极低功耗微处理器复位电路ZC803(ZC809,ZC810)
CAT809_810_cn
3脚微控制器电源监控电路－CAT809/810特性z对以下电源进行精密监控：+5.0V (+/- 5﹪, +/- 10﹪, +/- 20﹪)，+3.3V (+/- 5﹪, +/- 10﹪)，+3.0V (+/- 10﹪) 和+2.5V (+/- 5﹪)z提供2种输出配置：－CAT809：低有效复位－CAT810：高有效复位z在工业级温度范围的应用中可直接代替MAX809和MAX810z Vcc低至1.0V时复位有效z6uA的电源电流z抗电源的瞬态干扰z紧凑的3脚SOT23和SC70封装z工业级温度范围：－40℃～+85℃应用z计算机z服务器z手提电脑z线调制解调器（Cable modem）z无线通信z嵌入式控制系统z白色家电z功率计z智能仪器z PDA和手持式设备描述CAT809和CAT810是微控制器监控电路，用来监控数字系统的电源。
在工业级温度范围的应用中可直接代替MAX809和MAX810。
CAT809和CAT810产生一个复位信号，这个信号在电源电压低于预置的阈值时和电源电压上升到该阈值后的140ms内有效。
由于Catalyst半导体运用了底层浮动闸（floating gate）技术AE2TM，因此器件可以提供任何特定的复位阈值。
7个工业标准的阈值可支持+5.0V、+3.3V、+3.0V和+2.5V的系统。
CAT809的RESET是推挽输出（低有效），CAT810的RESET也是推挽输出（高有效）。
电源的快速瞬态变化可忽略，当Vcc低至1.0V时输出可保证仍处于正确状态。
CAT809/810可工作在整个工业级温度范围内（－40℃～+85℃），包含3脚SOT23和SC70两种封装形式。
阈值后缀选择器指定阈值电压阈值后缀名称4.63V L4.38V M4.00V J3.08V T2.93V S2.63V R2.32V Z管脚配置订购信息在器件型号的空白处插入后缀（L, M, J, T, S, R或Z）。
Z803说明书
Wireless Power Strip with Power Monitoring LCD&USB PortZ803说明书适用Firmware:V3.0适用Hardware:V1.0~V1.1目录一．声明 (3)二．简介 (3)三．外观图 (4)四．产品的安装及使用步骤 (5)1.接线 (5)2.加入网络 (5)3.绑定和解绑定 (5)4.受控制 (6)5.允许加网功能 (6)6.身份识别 (6)7.电能，电流，电压，电流切换显示 (7)8.report数据 (7)9.擦除网络信息 (7)10.擦除电能信息 (7)11.ZigBee描述 (7)12.产品属性及自定义指令说明 (9)五．负载特性 (11)六．相关产品 (11)七．安装方法 (111)八．维护和保养 (111)在未经大洋事先书面许可的情况下，严禁以任何形式复制、传递、分发和存储本文档中的任何内容。
大洋遵循持续发展的策略。
因此，大洋保留在不预先通知的情况下，对本文档中描述的任何产品进行修改和改进的权利。
在任何情况下，大洋均不对任何数据或收入方面的损失，或任何特殊、偶然、附带或间接损失承担责任，无论该损失由何种原因引起。
本文档的内容按“现状”提供。
除非适用的法律另有规定，否则不对本文档的准确性、可靠性和内容做出任何类型的、明确或默许的保证，其中包括但不限于对适销性和对具体用途的适用性的保证。
大洋保留在不预先通知的情况下随时修订或收回本文档的权利。
二．简介Z803（Wireless Power Strip with Power Monitoring LCD&USB Port）在网络中作为一个Simple Metering的角色类型。
Z803设备可以检测负载的电流,电压,功率,电能的功能，同时具有on/off control的功能。
Z803在网络中作为路由设备使用,允许其他设备做为其子设备。
Z803可与具有Match Key功能的设备绑定，通过已绑定设备来控制Z803开关，也可通过Z803设备本身自带的开关来控制。
MAX809
图 3 MAX809 的管脚配置
图 4 MAX810 的管脚配置 第2页共2页
广州周立功单片机发展有限公司 Tel 020 38730916 38730917 Fax 38730925
MAX809 的管脚说明
管脚
符号
1
GND
2
RESET
3
VCC
描述 器件的地 低电平有效复位信号 电源电压输入
广州周立功单片机发展有限公司 Tel 020 38730916 38730917 Fax 38730925
MAX809/MAX810 三管脚的微处理器复位芯片
综述
MAX809/MAX810 是一种单一功能的微处理器复位芯片 用于监控微控制器和其他逻辑系统的电源电 压 它可以在上电 掉电和节电情况下向微控制器提供复位信号 当电源电压低于预设的门槛电压时 器 件会发出复位信号 直到在一段时间内电源电压又恢复到高于门槛电压为止
VCC
VCC
RESET
MAX809
4.7 k Ω
GND
VCC RESET
MOTOROLA 68HCxx GND
图 7 通过双向复位 I/O 接口到微控制器
封装方式
MAX809 和 MAX810 都以卷盘封装 如图 8 所示
第6页共6页
广州周立功单片机发展有限公司 Tel 020 38730916 38730917 Fax 38730925
条件
最小值 -0.3 -0.3
-0.3 -40 -65 在 Tamb=70 以上 时下降 4mW/
最大值 6.0 VCC+0.3
单位 V V
VCC+0.3 20 20 100 +105 +150 320
ANALOG DEVICES ADM803 ADM809 ADM810 数据手册
REV.CInformation furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for itsuse, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies.One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 Fax: 781/326-8703© 2003 Analog Devices, Inc. All rights reserved.ADM803/ADM809/ADM810Microprocessor Supervisory Circuitsin 3-Lead SC70 and SOT-23FEATURESSpecified over TemperatureLow Power Consumption (17 A)Precision Voltage Monitor: 2.5 V, 3 V, 3.3 V, 5 V Options Reset Assertion Down to 1 V V CC140 ms Min Power-On ResetOpen-Drain RESET Output (ADM803)Push-Pull RESET Output (ADM809)Push-Pull RESET Output (ADM810)SC70 and SOT-23 PackagesAPPLICATIONSMicroprocessor SystemsComputersControllersIntelligent InstrumentsAutomotive SystemsFUNCTIONAL BLOCK DIAGRAMVVV CCFigure 1.Typical Operating CircuitGENERAL DESCRIPTIONThe ADM803/ADM809/ADM810 supervisory circuits monitor the power supply voltage in microprocessor systems. They pro-vide a reset output during power-up, power-down, and brownout conditions. On power-up, an internal timer holds reset asserted for 240 ms. This holds the microprocessor in a reset state until conditions have stabilized. The RESET output remains opera-tional with V CC as low as 1 V. The ADM803 and ADM809 provide an active low reset signal (RESET), while the ADM810 provides an active high signal (RESET) output. The ADM809 and ADM810 have push-pull outputs whereas the ADM803 has an open-drain output, which requires an external pull-up resistor. Seven reset threshold voltage options are available, suitable for monitoring a variety of supply voltages. Refer to Table I.The reset comparator features built-in glitch immunity, making it immune to fast transients on V CC.The ADM803/ADM809/ADM810 consume only 17 µA, making it suitable for low power portable equipment. The ADM803 is available in a 3-lead SC70; the ADM809/ADM810 is available in 3-lead SOT-23 and SC70 packages.查询ADM803LAKS-REEL供应商ADM803/ADM809/ADM810–SPECIFICATIONS(V CC = full operating range, T A = T MIN to T MAX,V CC Typ = 5 V for L/M/J models, 3.3 V for T/S models, 3 V for R models, 2.5 V for Z models, unless otherwise noted.)Parameter Min Typ Max Unit Test Conditions/CommentsV CC OPERATING VOLTAGE RANGE 1.0 5.5V T A = 0°C to 70°C1.2 5.5V T A = –40°C to +125°CSupply Current2435µA V CC < 5.5 V, ADM8_L/M/J,T A = –40°C to +85°C1730µA V CC < 3.6 V, ADM8_R/S/T/Z,T A = –40°C to +85°C60µA V CC < 5.5 V, ADM8_L/M/J,T A = 85°C to 125°C60µA V CC < 3.6 V, ADM8_R/S/T/Z,T A = 85°C to 125°CRESET THRESHOLDReset Voltage ThresholdADM8_L 4.56 4.63 4.70V T A = 25°CADM8_L 4.50 4.75V T A = –40°C to +85°CADM8_L 4.44 4.82V T A = –40°C to +125°CADM8_M 4.31 4.38 4.45V T A = 25°CADM8_M 4.25 4.50V T A = –40°C to +85°CADM8_M 4.20 4.56V T A = –40°C to +125°CADM8_J* 3.93 4.00 4.06V T A = 25°CADM8_J* 3.89 4.10V T A = –40°C to +85°CADM8_J* 3.80 4.20V T A = –40°C to +125°CADM8_T 3.04 3.08 3.11V T A = 25°CADM8_T 3.00 3.15V T A = –40°C to +85°CADM8_T 2.95 3.21V T A = –40°C to +125°CADM8_S 2.89 2.93 2.96V T A = 25°CADM8_S 2.85 3.00V T A = –40°C to +85°CADM8_S 2.81 3.05V T A = –40°C to +125°CADM8_R 2.59 2.63 2.66V T A = 25°CADM8_R 2.55 2.70V T A = –40°C to +85°CADM8_R 2.52 2.74V T A = –40°C to +125°CADM8_Z 2.28 2.32 2.35V T A = 25°CADM8_Z 2.25 2.38V T A = –40°C to +85°CADM8_Z 2.22 2.42V T A = –40°C to +125°CRESET THRESHOLD TEMPERATURECOEFFICIENT30ppm/°CV CC to Reset Delay20µs V CC = V TH to (V TH – 100 mV)RESET ACTIVE TIMEOUT PERIOD140240460ms T A = –40°C to +85°C100840ms T A = 85°C to 125°CRESET OUTPUT VOLTAGE LOW0.3V V CC = V TH min, I SINK = 1.2 mA, (ADM803/ADM809)ADM803R/S/T/Z, ADM809R/S/T/Z0.4V V CC = V TH min, I SINK = 3.2 mA,ADM803L/M/J, ADM809L/M/J0.3V V CC >1.0 V, I SINK = 50 µARESET OUTPUT VOLTAGE HIGH0.8 V CC V V CC > V TH max, I SOURCE = 500 µA, (ADM809)ADM809R/S/T/ZV CC – 1.5V V CC > V TH max, I SOURCE = 800 µA,ADM809L/M/JRESET OUTPUT VOLTAGE LOW(ADM810)0.3V V CC = V TH min, I SINK = 1.2 mA,ADM810R/S/T/Z0.4V V CC = V TH min, I SINK = 3.2 mA,ADM810L/M/JRESET OUTPUT VOLTAGE HIGH(ADM810)0.8 V CC V 1.8 V < V CC < V TH min,I SOURCE = 150 µARESET OPEN-DRAIN OUTPUTLeakage Current (ADM803)1µA V CC > V TH, reset de-asserted*ADM809/ADM810 only.Specifications subject to change without notice.–2–REV. CREV. C ADM803/ADM809/ADM810–3–ABSOLUTE MAXIMUM RATINGS *(T A = 25°C, unless otherwise noted.)V CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V RESET, RESET . . . . . . . . . . . . . . . . . . –0.3 V to V CC + 0.5 V Input CurrentV CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Output CurrentRESET, RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Rate of Rise, V CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V/µs JA Thermal Impedance, SC70 . . . . . . . . . . . . . . . . . 146°C/W JA Thermal Impedance, SOT-23 . . . . . . . . . . . . . . . 270°C/W Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300°C Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215°C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C*Stresses above those listed under Absolute Maximum Ratings may cause perma-nent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum ratings for extended periods of time may affect device reliability.PIN CONFIGURATIONRESET, RESET V CCVt 1 = RESET TIME = 240ms TYPV REF = RESET VOL T AGE THRESHOLDFigure 2.Power Fail Reset TimingTable I.Reset Threshold OptionsRESET Model Threshold (V)ADM8_L 4.63ADM8_M 4.38ADM8_J * 4.00ADM8_T 3.08ADM8_S 2.93ADM8_R 2.63ADM8_Z2.32*ADM809/ADM810 only.PIN FUNCTION DESCRIPTIONSPin No.Mnemonic Function1GND0 V. Ground reference for all signals.2RESET (ADM803/Active Low Logic Output.ADM809)RESET remains low while V CCis below the reset threshold and remains low for 240ms (typ)after V CC rises above the reset threshold.2RESET (ADM810)Active High Logic Output.RESET remains high while V CC is below the reset threshold and remains high for 240ms (typ)after V CC rises above the reset threshold.3V CCSupply Voltage Being Moni-tored.CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADM803/ADM809/ADM810 feature proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautionsare recommended to avoid performance degradation or loss of functionality.ADM803/ADM809/ADM810ORDERING GUIDE (ADM803 and ADM809)Model Reset Threshold (V)Temperature Range Branding Quantity Package Type ADM803LAKS-REEL 4.63–40°C to +125°C M0210 k3-Lead SC70 ADM803LAKS-REEL-7 4.63–40°C to +125°C M02 3 k3-Lead SC70 ADM803MAKS-REEL 4.38–40°C to +125°C M0310 k3-Lead SC70 ADM803MAKS-REEL-7 4.38–40°C to +125°C M03 3 k3-Lead SC70 ADM803TAKS-REEL 3.08–40°C to +125°C M0510 k3-Lead SC70 ADM803TAKS-REEL-7 3.08–40°C to +125°C M05 3 k3-Lead SC70 ADM803SAKS-REEL 2.93–40°C to +125°C M0610 k3-Lead SC70 ADM803SAKS-REEL-7 2.93–40°C to +125°C M06 3 k3-Lead SC70 ADM803RAKS-REEL 2.63–40°C to +125°C M0710 k3-Lead SC70 ADM803RAKS-REEL-7 2.63–40°C to +125°C M07 3 k3-Lead SC70 ADM803ZAKS-REEL 2.32–40°C to +125°C M0810 k3-Lead SC70 ADM803ZAKS-REEL-7 2.32–40°C to +125°C M08 3 k3-Lead SC70 ADM809LART-REEL 4.63–40°C to +125°C9LXX10 k3-Lead SOT-23 ADM809LART-REEL-7 4.63–40°C to +125°C9LXX 3 k3-Lead SOT-23 ADM809LAKS-REEL 4.63–40°C to +125°C M9A10 k3-Lead SC70 ADM809LAKS-REEL-7 4.63–40°C to +125°C M9A 3 k3-Lead SC70 ADM809MART-REEL 4.38–40°C to +125°C9MXX10 k3-Lead SOT-23 ADM809MART-REEL-7 4.38–40°C to +125°C9MXX 3 k3-Lead SOT-23 ADM809MAKS-REEL 4.38–40°C to +125°C M9B10 k3-Lead SC70 ADM809MAKS-REEL-7 4.38–40°C to +125°C M9B 3 k3-Lead SC70 ADM809JART-REEL 4.00–40°C to +125°C9JXX10 k3-Lead SOT-23 ADM809JART-REEL-7 4.00–40°C to +125°C9JXX 3 k3-Lead SOT-23 ADM809JAKS-REEL 4.00–40°C to +125°C M9C10 k3-Lead SC70 ADM809JAKS-REEL-7 4.00–40°C to +125°C M9C 3 k3-Lead SC70 ADM809TART-REEL 3.08–40°C to +125°C9TXX10 k3-Lead SOT-23 ADM809TART-REEL-7 3.08–40°C to +125°C9TXX 3 k3-Lead SOT-23 ADM809TAKS-REEL 3.08–40°C to +125°C M9D10 k3-Lead SC70 ADM809TAKS-REEL-7 3.08–40°C to +125°C M9D 3 k3-Lead SC70 ADM809SART-REEL 2.93–40°C to +125°C9SXX10 k3-Lead SOT-23 ADM809SART-REEL-7 2.93–40°C to +125°C9SXX 3 k3-Lead SOT-23 ADM809SAKS-REEL 2.93–40°C to +125°C M9E10 k3-Lead SC70 ADM809SAKS-REEL-7 2.93–40°C to +125°C M9E 3 k3-Lead SC70 ADM809RART-REEL 2.63–40°C to +125°C9RXX10 k3-Lead SOT-23 ADM809RART-REEL-7 2.63–40°C to +125°C9RXX 3 k3-Lead SOT-23 ADM809RAKS-REEL 2.63–40°C to +125°C M9F10 k3-Lead SC70 ADM809RAKS-REEL-7 2.63–40°C to +125°C M9F 3 k3-Lead SC70 ADM809ZART-REEL 2.32–40°C to +125°C9ZXX10 k3-Lead SOT-23 ADM809ZART-REEL-7 2.32–40°C to +125°C9ZXX 3 k3-Lead SOT-23 ADM809ZAKS-REEL 2.32–40°C to +125°C M9G10 k3-Lead SC70 ADM809ZAKS-REEL-7 2.32–40°C to +125°C M9G 3 k3-Lead SC70–4–REV. CREV. C ADM803/ADM809/ADM810–5–ORDERING GUIDE (ADM810)ModelReset Threshold (V)Temperature Range Branding Quantity Package Type ADM810LART-REEL 4.63–40°C to +125°C ALXX 10 k 3-Lead SOT-23ADM810LART-REEL-7 4.63–40°C to +125°C ALXX 3 k 3-Lead SOT-23ADM810LAKS-REEL 4.63–40°C to +125°C MAA 10 k 3-Lead SC70ADM810LAKS-REEL-7 4.63–40°C to +125°C MAA 3 k 3-Lead SC70ADM810MART-REEL 4.38–40°C to +125°C AMXX 10 k 3-Lead SOT-23ADM810MART-REEL-7 4.38–40°C to +125°C AMXX 3 k 3-Lead SOT-23ADM810MAKS-REEL 4.38–40°C to +125°C MAB 10 k 3-Lead SC70ADM810MAKS-REEL-7 4.38–40°C to +125°C MAB 3 k 3-Lead SC70ADM810JART-REEL 4.00–40°C to +125°C AJXX 10 k 3-Lead SOT-23ADM810JART-REEL-7 4.00–40°C to +125°C AJXX 3 k 3-Lead SOT-23ADM810JAKS-REEL 4.00–40°C to +125°C MAC 10 k 3-Lead SC70ADM810JAKS-REEL-7 4.00–40°C to +125°C MAC 3 k 3-Lead SC70ADM810TART-REEL 3.08–40°C to +125°C ATXX 10 k 3-Lead SOT-23ADM810TART-REEL-7 3.08–40°C to +125°C ATXX 3 k 3-Lead SOT-23ADM810TAKS-REEL 3.08–40°C to +125°C MAD 10 k 3-Lead SC70ADM810TAKS-REEL-7 3.08–40°C to +125°C MAD 3 k 3-Lead SC70ADM810SART-REEL 2.93–40°C to +125°C ASXX 10 k 3-Lead SOT-23ADM810SART-REEL-7 2.93–40°C to +125°C ASXX 3 k 3-Lead SOT-23ADM810SAKS-REEL 2.93–40°C to +125°C MAE 10 k 3-Lead SC70ADM810SAKS-REEL-7 2.93–40°C to +125°C MAE 3 k 3-Lead SC70ADM810RART-REEL 2.63–40°C to +125°C ARXX 10 k 3-Lead SOT-23ADM810RART-REEL-7 2.63–40°C to +125°C ARXX 3 k 3-Lead SOT-23ADM810RAKS-REEL 2.63–40°C to +125°C MAF 10 k 3-Lead SC70ADM810RAKS-REEL-7 2.63–40°C to +125°C MAF 3 k 3-Lead SC70ADM810ZART-REEL 2.32–40°C to +125°C AZXX 10 k 3-Lead SOT-23ADM810ZART-REEL-7 2.32–40°C to +125°C AZXX 3 k 3-Lead SOT-23ADM810ZAKS-REEL 2.32–40°C to +125°C MAG 10 k 3-Lead SC70ADM810ZAKS-REEL-72.32–40°C to +125°CMAG3 k3-Lead SC70REV. C–6–ADM803/ADM809/ADM810–Typical Performance CharacteristicsTEMPERA TURE (؇C)30252015105S U P P L Y C U R R E N T (A )TPC 1.Supply Current vs. Temperature (No Load)020406080100120140160180P O W E R -D O W N R E S E T (s )TEMPERA TURE (؇C)200TPC 2.Power-Down RESET Delay vs. Temperature ADM8_L/M/J020406080100120140160180P O W E R -D O W N R E S E T (s )TEMPERA TURE (؇C)TPC 3.Power-Down RESET Delay vs. Temperature ADM8_T/S/R/Z235.0235.5236.0236.5237.0237.5238.0238.5239.0239.5240.0P O W E R -D O W N R E S E T (s )TEMPERA TURE (؇C)–40–2002040608085TPC 4.Power-Down RESET Delay vs. Temperature ADM8_R0.99901.00201.00151.00101.00051.00000.9995NO R M A L I Z E D R E S E T T H R E S H O L DTEMPERA TURE (؇C)–40–2002040608085TPC 5.Normalized RESET Voltage Threshold vs.TemperatureTPC 6.RESET Output Voltage vs. Supply VoltageREV. C ADM803/ADM809/ADM810–7–4003500110100010030025050200150100RESET COMP ARA TOR OVERDRIVE, V TH – V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (s )TPC 7.Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator OverdriveINTERFACING TO OTHER DEVICES’ OUTPUTThe ADM803/ADM809/ADM810 series is designed to integrate with as many devices as possible and, therefore, has a standard output dependent on V CC . This enables the part to be used in both 3 V and 5 V or any nominal voltage within the minimum and maximum specifications for V CC . Because of this design approach, interfacing this device to other devices is simplified.Ensuring a Valid Reset Output Down to V CC = 0 VWhen V CC falls below 0.8 V, the ADM803/ADM809’s RESET no longer sinks current. A high impedance CMOS logic input connected to RESET may, therefore, drift to undetermined logic levels. To eliminate this problem, a 100k Ω resistor should be connected from RESETto ground.V Figure 3.Ensuring a Valid Reset Output Down to V CC = 0 VBenefits of a Very Accurate Reset ThresholdIn other microprocessor supervisory circuits, tolerances in supply voltages lead to an overall increase in reset tolerance levels due to the deterioration of the microprocessor reset circuit’s power supply. The possibility of a malfunction during a power failure is greatly reduced because the ADM803/ADM809/ADM810 series can operate effectively even when there are large degradations of the supply voltages. Another advantage of the ADM803/ADM809/ADM810 series is its very accurate internal voltage reference circuit. These benefits combine to produce an excep-tionally reliable voltage monitor circuit.Interfacing to Microprocessors with Multiple InterruptsIn a number of cases, it is necessary to interface many interrupts from different devices (e.g., thermal, altitude, and velocity sensors).The ADM803/ADM809/ADM810 can easily be integrated into existing interrupt-handling circuits (Figure 4) or be used as astandalone device.TOFigure 4.Interfacing to Microprocessors with Multiple InterruptsREV. C–8–ADM803/ADM809/ADM810OUTLINE DIMENSIONS3-Lead Small Outline Transistor Package [SOT-23](RT-3)Dimensions shown in millimetersCOMPLIANT TO JEDEC STANDARDS TO-236AB3-Lead Thin Shrink Small Outline Transistor Package [SC70](KS-3)Dimensions shown in millimeters0.10 COPLANARITYREV. C ADM803/ADM809/ADM810–9–Revision HistoryLocationPage6/03—Data Sheet changed from REV. B to REV. C.Added ADM803 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Universal Changes to FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Changes to GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Changes to Figure 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Changes to Table I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Updated ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41/03—Data Sheet changed from REV. A to REV. B.Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Changes to Table I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Changes to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Changes to TPCs 1–3, and TPC 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .710/02—Data Sheet changed from REV. 0 to REV. A.Addition of SC70 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Universal Change to GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Changes to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Change to Table I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Change to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Change to TPC 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7–10––11–)C(3/6––6373C –12–。
嵌入式低功耗上电复位与晶振电路设计
嵌入式低功耗上电复位与晶振电路设计嵌入式系统通常用于对资源有限的设备上，这些设备往往需要在功耗和成本等方面做出不少的牺牲，因此嵌入式系统的电源管理非常重要。
在嵌入式系统中，上电复位和晶振电路是非常基础并且重要的电路，本文将介绍如何设计嵌入式低功耗上电复位与晶振电路。
1. 上电复位电路设计上电复位电路是在MCU芯片在接收到电源供电后，自动将其所在的每个模块、寄存器等先设置为默认状态，并强制系统从开机时的起点开始运行，以保证系统具有可靠的运行性能。
也就是说当我们将嵌入式系统的电源接入时，每个模块都应该是按照“出厂时”的状态进行初始化操作。
而上电复位电路本身需要保证在模块处于不稳定状态时，能够使CPU被强制复位并进入到正常的执行流程中。
常规的上电复位电路设计保留了一个名为“复位端口”的引脚。
当此引脚被接通至电源时，MCU将被复位。
MCU内部的复位控制单元会确保系统重新回到开机状态。
当一个简单的氧化锌陶瓷电容被加至上电复位电路上，可提高复位电路的可靠性。
这个电容通过在上电时对复位线施加一个脉冲，确保了MCU的复位过程。
当电容充电时，CPU 的Vcc可能很快地达到满电压，但复位电路保持复位端口的输出低电平，确保MCU保持复位状态尽可能长的时间。
过去，为了能够确保复位电路在振荡器上电失效之前正常工作，电容必须由一个跨越 5 V 的 Zener 稳压二极管保护。
但是，该方法使用复位线上的氧化锌陶瓷电容会导致电流过大，且电容非常大，不适合于嵌入式系统(MCU)，其较小的、低功耗微控制器可能无法将其充电。
此外，这种复位电容不适用于电平转换电路，因为当我们使用多个阶段的开关电源时，MCU的电压可能低于复位电路的起始电压。
这意味着，这个时候MCU不可用就需要等到电容电荷被释放了一段时间，才能充上电。
常规上电复位电路优点在于设计简单，不需要任何特殊的器件，只需加入少量的电容和电阻即可。
但是它的主要问题仍然是带来的系统复位延迟，因为MCU的实际复位过程必须等待复位电路的充电时间。
电压延时功能的复位芯片
电压延时功能的复位芯片概述
电压延时功能的复位芯片可以通过检测电源电压的变化，并在电源电压达到某个阈值时，触发复位操作。
这种芯片通常用于微控制器、微处理器或其他数字逻辑电路中，以确保它们在电源电压不稳定或突然掉电时能够安全地复位。
电压延时功能的复位芯片有多种型号，以下是一些常见的品牌和型号：
1. Maxim MAX809/MAX810：这是一种常用的微控制器复位芯片，具有低功耗、高可靠性和低成本的优点。
它可以在电源电压下降到某个阈值时，自动触发复位操作。
2. STMicroelectronics ST1232：这是一种通用型的复位芯片，适用于多种微控制器和数字逻辑电路。
它具有低功耗、高速和低噪声的优点。
3. NXP K5031：这是一种适用于微控制器的复位芯片，具有低功耗、低成本和紧凑的封装尺寸。
它可以在电源电压上升或下降到某个阈值时，触发复位操作。
这些复位芯片都具有可调的电压阈值和延时时间，可以根据具体应用的需求进行配置。
同时，它们都具有低功耗和低噪声的优点，可以有效地延长微控制器的使用寿命和提高系统的稳定性。
IMP809_810 SOT23复位芯片
POWER MANAGEMENT- Improved Maxim MAX809/MAX810 replacement —Lower supply current…6µA —80% lower maximum supply current - Monitor 5V, 3.3V and 3V supplies - 140ms min. reset pulse width- Active-low reset valid with 1.1V supply (IMP809)- Small 3-pin SOT-23 package - No external components- Specified over full temperature range — -40°C to 105°C- Embedded controllers - Battery operated systems - Intelligent instruments- Wireless communication systems - PDAs and handheld equipmentThe IMP809/IMP810 are 3.0V, 3.3V and 5.0V power supply supervisor circuits optimized for low-power microprocessor (µP), microcontroller (µC) and digital systems. The IMP809/810 are improved drop-in re-placements for the Maxim MAX809/810 and feature 60% lower supply current.A reset signal is issued if the power supply voltage drops below a preset reset threshold and is asserted for at least 140ms after the supply has risen above the reset threshold. The IMP809 has an active-low RE-SET output that is guaranteed to be in the correct state for V CC down to 1.1V. The IMP810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on V CC .Low supply current makes the IMP809/IMP810 ideal for use in portable and battery operated equipment. The IMP809/IMP810 are available in a compact 3-pin SOT23 package. Six voltage thresholds are available to support 3V to 5V systems:Key FeaturesApplicationsGeneral DescriptionR eset ThresholdSuf f i x V olt ag e (V) L 4.63 M 4.38 J 4.00 T 3.08 S 2.93 R 2.63 Z 2.32¯¯¯¯¯¯Pin Assignments(RESET )RESET SOT23GNDV CCIMP809 (IMP810)POWER MANAGEMENTAbsolute Maximum RatingsPin DescriptionsPin N u mberN a me Function1 GNDGround 2 (IMP809)RESET RESET is asserted LOW if V CC falls below the reset threshold and remains LOW for the 240ms typical reset timeout period (140ms minimum) after V CC exceeds the threshold. 2 (IMP810)RESETRESET is asserted HIGH if V CC falls below the reset threshold and remains HIGH for the240ms typical reset timeout period (140ms minimum) after V CC exceeds the threshold.3V CC Power supply input voltage (3.0V , 3.3V , 5.0V) ¯¯¯¯¯¯ ¯¯¯¯¯¯ Pin Terminal Voltage with Respect to GroundV CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0VRESET, RESET . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to (V CC + 0.3V) Input Current at V CC . . . . . . . . . . . . . . . . . . . 20mA Output Current: RESET, RESET . . . . . . . . . 20mA Rate of Rise at V CC . . . . . . . . . . . . . . . . . . . . 100V/µs Power Dissipation (T A = 70°C) . . . . . . . . . . 320mW (Derate 4mW/°C above 70°C)Operating Temperature Range . . . . . . . . . . –40°C to 105°C Storage Temperature Range . . . . . . . . . . . . . –65°C to 160°C Lead Temperature (soldering, 10 sec) . . . . . 300°CThese are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability.Block DiagramV CCV CCIMP809 (IMP810)V CCGNDRESET ¯¯¯¯¯¯ InputGNDRESET ¯¯¯¯¯¯ RESETPOWER MANAGEMENTElectrical CharacteristicUnless otherwise noted V CC is over the full voltage range, T A = –40°C to 105°C.Typical values at T A = 25°C, V CC = 5V for L/M/J devices, V CC = 3.3V for T/S devices and V CC = 3V for R devices.V CC=2.5V for Z devicesPOWER MANAGEMENTTypical Performance CharacteristicsReset TimingThe reset signal is asserted–LOW for the IMP809 and HIGH for the IMP810–when the VCC signal falls below the threshold trip voltage and remains asserted for 140ms minimum after the VCC has risen above the threshold.V THActive Reset Timeout Period 140ms minimumIMP809IMP8105V 0V5V 0V 5V 0VRESET RESET¯¯¯¯¯¯ V CCFigure 1. Reset Timing DiagramNegative V CC TransientsThe IMP809/810 protect µPs from brownouts and low V CC . Short duration transients of 100mV amplitude and 20µs or less duration typically do not cause a false RESET. Valid Reset with V CC under 1.1V¯¯¯¯¯¯ ¯¯¯¯¯¯To ensure logic inputs connected to the IMP809 RESET pin are in a known state when VCC is under 1.1V, a 100k Ω pull -down resistor at RESET is needed. The value is not critical. A pull-up resistor to VCC is needed with the IMP810.POWER MANAGEMENTTypical Performance Characteristics(Continued)V CCPowerSupplyGNDIMP810100k ΩRESET V CC Power SupplyGNDIMP809100k ΩRESET ¯¯¯¯¯ Figure 2. RESET Valid with VCC Under 1.1V ¯¯¯¯¯¯¯ Figure 3. RESET Valid with V CC Under 1.1VBi-directional Reset Pin InterfacingThe IMP809/810 can interface with µP/µC bi-directional reset pins by connecting a 4.7k Ω resistor in series with the IMP809/810 reset output and the µP/µC bi-directional reset pin.Power SupplyV CCIMP809RESET ¯¯¯¯¯¯ GNDBUF4.7k ΩBuffered RESET ¯¯¯¯¯¯µC or µPRESET ¯¯¯¯¯¯ InputGNDBi-directional I/O Pin(Example: 68HC11)Figure 4. Bi-directional Reset Pin InterfacingPOWER MANAGEMENTOrdering InformationP a c k a g e Mar king2 P a r t N umber1R eset Threshold(V)T e mper ature R ang e Pin-Pac k a g e(XXX L o t Code) IMP809 Active LOW ResetIMP809LEUR-T 4.63 –40°C to+105°C3-SOT23AAXXX IMP809MEUR-T 4.38–40°C to+105°C3-SOT23ABXXX IMP809JEUR-T 4.00–40°C to+105°C3-SOT23CWXXX IMP809TEUR-T 3.08–40°C to+105°C3-SOT23ACXXX IMP809SEUR-T 2.93–40°C to+105°C3-SOT23ADXXX IMP809REUR-T 2.63–40°C to+105°C3-SOT23AFXXX IMP809ZEUR-T 2.32–40°C to+105°C3-SOT23ZAXXX IMP810 Active HIGH ResetIMP810LEUR-T 4.63 –40°C to+105°C3-SOT23AGXXX IMP810MEUR-T 4.38–40°C to+105°C3-SOT23AHXXX IMP810JEUR-T 4.00–40°C to+105°C3-SOT23AIXXX IMP810TEUR-T 3.08–40°C to+105°C3-SOT23AJXXX IMP810SEUR-T 2.93–40°C to+105°C3-SOT23AKXXX IMP810REUR-T 2.63–40°C to+105°C3-SOT23ALXXX IMP810ZEUR-T 2.32–40°C to+105°C3-SOT23ZBXXXNotes: 1. Tape and Reel packaging is indicated by the -T designation.2. Devices may also be marked with full part number: 809L, 810M etc. XXX refers to lot.Related ProductsIMP809IMP810IMP811IMP812 Max.Supply Current15µA15µA15µA15µA Package Pins3344Manual RESET input■■Package T ype SOT-23SOT-23SOT-143SOT-143 Active-HIGH RESET output■■Active-LOW RESET output■■POWER MANAGEMENTMechanical DimensionsPlastic SOT-23 (3-Pin)POWER MANAGEMENTISO 9001 RegisteredDaily Silver IMP Microelectronics Co.,Ltd7 keda Road ,Hi-Tech Park,NingBo,Zhejiang,P.R.CPost Code:315040Tel:(086)-574-87906358Fax:(086)-574-87908866Email:sales@ The IMP logo is a registered trademark of Daily Silver IMP. All other company and product names are trademarks of their respective owners @2009 Daily Silver IMP Printed in china Revision: FIssue Date: 14th.Jun.09 Type: Product。
SP809 SP810微处理器监控电源管理芯片说明书
S P 809 / S P 8103 P i n M i c r o p r o c e s s o r S u p e r v i s o r C i r c u i tGENERAL DESCRIPTIONThe SP809/SP810 are low power microprocessor (μP) supervisory circuits used to monitor power supp lies in μP and digital systems.They provide applications with benefits of circuit reliability and low cost by eliminating external components. If the VCC supply voltage falls below preset threshold then a reset signal is asserted for at least 140ms after V CC has risen above the reset threshold. Both the SP809 and SP810 were designed with a reset comparator to help identify invalid signals, which last less than 140ms. The onlydifference between them is that they have an active-low RESET output and active-high RESET output, respectively. Low supply current (1μA) makes SP809/SP810 ideal for portable equipment.The devices are available in 3 pin SOT-23 package.Part NumberOutput Type SP809N Open Drain Active LowSP809 Push-Pull Low SP810Push-Pull Active HighAPPLICATIONS• Portable Electronic Devices • Electrical Power Meters • Digital Still Cameras • µP Power MonitoringFEATURES• Ultra Low Supply Current 1µA (typ) • Guaranteed Reset valid to V CC = 0.9V • 140ms Power-On Reset Pulse Width • Internally Fixed Threshold2.3V, 2.6V, 2.9V,3.1V,4.4V, 4.6V • 1.5% Voltage Threshold Tolerance • 3 Pin SOT-23 PackageTYPICAL APPLICATION DIAGRAMFig. 1: SP809 / SP810 Application DiagramABSOLUTE MAXIMUM RATINGSThese are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.V CC .......................................................... -0.3V to 6.5V RESET, RESET...................................... -0.3V to V CC+0.3V Output Current (RESET, RESET) ............................... 20mA Power Dissipation (T A=70°C) .............................. 320mW Junction Temperature .......................................... 125°C Storage Temperature .............................. -65°C to 150°C OPERATING RATINGSInput Voltage Range V CC ................................ 0.9V to 6V Junction Temperature Range ..................... -40°C to 85°CELECTRICAL SPECIFICATIONSSpecifications with standard type are for an Operating Temperature of T A= 25°C only; limits applying over the full Operating Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T A = 25°C, and are provided for reference purposes only. Unless otherwise indicated, T A= 25°C.Note 1: RESET output is for SP809; RESET output is for SP810.BLOCK DIAGRAMFig. 2: SP809 / SP810 Block Diagram PIN ASSIGNMENTFig. 3: SP809 / SP810 Pin Assignment PIN DESCRIPTIONORDERING INFORMATION (1)Part NumberOperating Temperature Range Lead-Free Package Packing MethodSP809EK-L-2-3/TR -40°C≤T A ≤+85°C Yes (2) SOT23-3 Tape & ReelSP809EK-L-2-6/TR SP809EK-L-2-9/TR SP809EK-L-3-1/TR (3) SP809EK-L-4-6/TR (3) SP809NEK-L-2-3/TR (3)SP809NEK-L-2-9/TR (3) SP809NEK-L-3-1/TR SP809NEK-L-4-6/TR (3) SP810EK-L-4-4/TR (3) NOTES:1. Refer to /SP809 and /SP810 for most up-to-date Ordering Information.2. Visit for additional information on Environmental Rating.3. NRND – Not Recommended for New Designs.TYPICAL PERFORMANCE CHARACTERISTICSAll data taken at T A = 25°C, unless otherwise specified - Schematic and BOM from Application Information section of thisdatasheet.Fig. 4: Supply Current versus TemperatureFig. 5: Power-Down Reset Delay versus TemperatureFig. 6: Power-Down Reset Delay versus TemperatureFig. 7: Power-Down Reset Delay versus TemperatureFig. 8: Normalized Reset Threshold versus TemperatureFig. 9: Power-Up Reset Time-out versus TemperatureTHEORY OF OPERATIONμP will be activated at a valid reset state. These μP supervisory circuits assert reset to prevent code execution errors during power-up,power-down, or brownout conditions. Reset is guaranteed to be a logic low for V TH>V CC>0.9V. Once V CC exceeded the reset threshold, an internal timer keeps RESET low for the reset timeout period; after this interval, RESET goes high.If a brownout condition occurs (V CC drops below the reset threshold), RESET goes low. Any time V CC goes below the reset threshold, the internal timer resets to zero, and RESET goes low. The internal timer is activated after V CC returns above the reset threshold, and RESET remains low for the reset timeout period.B ENEFIT OF H IGHLY A CCURATE R ESETT HRESHOLDSP809/810 with specified voltage as 5V±10% or 3V±10% are ideal for systems using a 5V±5% or 3V±5% power supply. The reset is guaranteed to assert after the power supply falls below the minimum specified operating voltage range of the system ICs. The pre-trimmed thresholds are reducing the range over which an undesirable reset may occur.Fig. 10: Timing WaveformsAPPLICATION INFORMATIONN EGATIVE G OING V CC T RANSIENTSIn addition to issuing a reset to the µP during power-up, power-down, and brownout conditions, SP809 series are relatively resistant to short-duration negative-going V CC transient.E NSURING A V ALID R ESET O UTPUT D OWNTO V CC=0When V CC falls below 0.9V, SP809 RESET output no longer sinks current; it becomes an open circuit. In this case, high-impedance CMOS logic inputs connecting to RESET can drift to undetermined voltages. Therefore, SP809/810 with CMOS is perfect for most applications of V CC down to 0.9V.However in applications where RESET must be valid down to 0V, adding a pull-down resistor to RESET causes any leakage currents to flow to ground, holding RESET low. I NTERFACING TO µP WITH B IDIRECTIONALR ESET P INSThe RESET output on the SP809N is open drain, this device interfaces easily with μPs that have bidirectional reset pins. Connecting the μP supervisor's RESET output directly to the microcontroller's RESET pin with a single pull-up resistor allows either device to assert reset. T EST C IRCUITFig. 11: Test CircuitPACKAGE SPECIFICATION 3-P IN SOT23REVISION HISTORYRevision Date Description2.0.0 2011 Reformat of DatasheetCorrection of package drawing2.0.1 August 2017 Correct Reset Delay conditions. Updated to MaxLinear logo. Updated format and ordering information table.2.0.2November 2017Corrected typo from rev 2.0.1, added 2 missing overlines to RESET in ElectricalSpecifications.Corporate Headquarters: 5966 La Place Court Suite 100Carlsbad, CA 92008 Tel.:+1 (760) 692-0711 Fax: +1 (760) 444-8598 High Performance Analog: 1060 Rincon Circle San Jose, CA 95131 Tel.: +1 (669) 265-6100 Fax: +1 (669) 265-6101Email: ************************* The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc.. MaxLinear, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of MaxLinear, Inc.Maxlinear, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless MaxLinear, Inc. receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of MaxLinear, Inc. is adequately protected under the circumstances.MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. Company and product names may be registered trademarks or trademarks of the respective owners with which they are associated.。
stm809复位电路工作原理
stm809复位电路工作原理
STM809复位电路是一种微控制器系统中常见的供电监控和复位功能电路，其工作原理如下：
1. 电源检测：当外部电源开始供电时，STM809复位电路会监测电源电压是否达到工作电压范围。
如果电源电压低于工作电压范围，复位电路会保持复位状态，确保不会让微控制器运行在不恰当的电压下。
2. 复位信号生成：如果电源电压正常，STM809复位电路会延迟一定时间（通常为几毫秒），然后生成一个复位脉冲信号。
这个脉冲信号会使得连接到微控制器的复位引脚被拉低，以将微控制器复位到初始状态。
3. 复位持续时间：复位脉冲信号的持续时间取决于复位电路的设计。
通常情况下，复位脉冲信号持续几十毫秒，足够确保微控制器完全复位并完成初始化程序。
4. 复位解除：经过一段时间后，STM809复位电路会自动将复位引脚恢复高电平，解除复位状态，允许微控制器正常运行。
总结起来，STM809复位电路的工作原理就是通过检测外部电源的情况，生成适当的复位脉冲信号，确保微控制器在正确的电压和初始化状态下正常工作。
这种电路可以有效保护系统免受电源问题和错误初始化引起的异常运行。
MICROCHIP TCM809 TCM810 说明书
图中该曲线以上范围视为掉电或断电条件。 在 TCM809/ TCM810 的 VDD 引脚就近接入一个电容可进一步改善器 件的瞬态脉冲干扰抑制性能。
TCM809/TCM810 可进行准确的 VDD 监控， 并在上电、 断电、掉电以及电源电压下陷时提供准确的复位时序。 这两款器件还具备对电源线上的负向瞬态脉冲干扰进行 抑制的能力。图 2-1 显示了器件可抑制的最大瞬态脉冲 干扰持续时间与最大负向瞬态脉冲幅度的关系曲线。图 中该曲线以下范围的瞬态脉冲持续时间和幅度都不会产 生复位信号。
应用
• • • • • 计算机 嵌入式系统 电池供电设备 关键单片机电源电压监控 汽车
引脚配置
SOT-23B/SC-70 封装
GND 1 TCM809 或 TCM810 3 VDD
典型应用电路
VDD 3 VDD TCM809 RESET GND 1 2 VDD PIC 单片机 RESET 输入 ( 低电平有效 ) GND
电气特性
除非另外声明，否则 VDD = 满幅电压范围， TA = 工作温度范围。 典型值的测试条件： TA = +25°C, VDD = 5V （ L/M/J） , 3.3V （ T/S）,3.0V （ R） , 以及 2.5V （ Z） ( 注 1)。 参数 VDD 范围 供电电流 (SOT-23) 供电电流 (SC-70) 复位门限电压值 ( 注 2) ICC ICC VTH 符号 最小值 1.0 1.2 — — — — 4.56 4.50 4.31 4.25 3.93 3.89 3.04 3.00 2.89 2.85 2.59 2.55 2.28 2.25 复位门限温度系数 VDD 复位延迟， SOT-23 VDD 复位延迟， SC-70 复位有效超时周期， SOT-23 复位有效超时周期， SC-70 RESET 低电平输出电压 (TCM809) RESET 高电平输出电压 (TCM809) 注 1: 2: VOL — — — 140 140 — — — 0.8 VDD VDD – 1.5 典型值 — — 24 17 12 9 4.63 — 4.38 — 4.00 — 3.08 — 2.93 — 2.63 — 2.32 — 30 20 65 240 320 — — — — — 最大值 5.5 5.5 60 50 30 25 4.70 4.75 4.45 4.50 4.06 4.10 3.11 3.15 2.96 3.00 2.66 2.70 2.35 2.38 — — — 560 560 0.3 0.4 0.3 — — ppm/°C µs µs ms ms V TCM809R/S/T/Z: VDD = VTH min, ISINK = 1.2 mA TCM809L/M/J: VDD = VTH min, ISINK = 3.2 mA VDD > 1.0V, ISINK = 50 µA TCM809R/S/T/Z: VDD > VTH max, ISOURCE = 500 µA TCM809L/M/J: VDD > VTH max, ISOURCE = 800 µA VDD = VTH 至 (VTH – 100 mV) ( 注 2) VDD = VTH 至 (VTH – 100 mV) ( 注 2) 单位 V µA µA V TA = 0°C 至 +70°C TA = -40°C 至 +125°C TCM8xxL/M： VDD < 5.5V TCM8xxR/S/T/Z：VDD < 3.6V TCM8xxL/M/J： VDD < 5.5V TCM8xxR/S/T/Z： VDD < 3.6V TCM8xxL: TCM8xxM: TCM809J: TCM8xxT: TCM8xxS: TCM8xxR: TCM8xxZ: TA = +25°C TA = – 40°C 至 +125°C TA = +25°C TA = – 40°C 至 +125°C TA = +25°C TA = – 40°C 至 +125°C TA = +25°C TA = – 40°C 至 +125°C TA = +25°C TA = – 40°C 至 +125°C TA = +25°C TA = – 40°C 至 +125°C TA = +25°C TA = – 40°C 至 +125°C 测试条件
MAX809(复位芯片)
3
VCC
Description
Ground
RESET output remains low while VCC is below the reset voltage threshold, and for a reset timeout period after VCC rises above reset threshold
RESET output remains high while VCC is below the reset voltage threshold, and for a reset timeout period after VCC rises above reset threshold
Supply Voltage (Typ)
Typical Applications
• Computers • Embedded Systems • Battery Powered Equipment • Critical Microprocessor Power Supply Monitoring
VCC
VCC MAX809/810
RESET RESET
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet.
DEVICE MARKING INFORMATION
VCC PROCESSOR
RESET INPUT
GND
GND
3
1 2
SOT−23 (TO−236) CASE 318
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极低功耗微处理器复位电路ZC803/ZC809/ZC810概述ZC803/809/810系列电路是用来监测电源电压或电池电压的微处理器复位电路。
本系列电路不需要外围器件，从而提高了系统的可靠性，降低了系统的成本。
本系列电路在被监测的电源电压低于预先设置的复位阈值时，输出有效的复位信号；当电源电压上升到复位阈值以上时，在至少140毫秒的时间内复位信号还将维持有效。
ZC803提供漏极开路复位输出，ZC809/810提供CMOS复位输出。
ZC803的漏极开路输出需要一个上拉电阻，此电阻可以被连接到V CC 或VCC以外的其它电源。
ZC803/809的复位输出为低有效，ZC810的复位输出为高有效。
在设计上保证短时间的电源突降不会影响复位输出。
在整个温度范围内，当电源电压低至1.15V时仍能保证可靠输出。
本系列器件采用3个管脚和5个管脚的SOT23封装。
应用● 计算机● 微控制器● 智能仪表● 便携式或电池供电的设备● 数码相框特点● 精确的复位阈值：±2.5%● 复位阈值从2.1V到5.0V，每0.1V一档● 提供两种复位输出-漏极开路输出 (ZC803)-CMOS输出 (ZC809/810)● 最小140ms的复位脉冲宽度● 低工作电流：3.3V时典型值1.6μA● 复位信号在电源电压低至1.15V时仍能维持可靠输出● 对短时间电源突降的过滤功能● 工作温度范围：－40°C to +85°C● 采用SOT23-3和SOT23-5封装管脚排列图括号里的内容只针对ZC810器件功能一览表器件型号复位阈值复位电平高有效或低有效输出类型顶部标识ZC803L 4.63V 低OD AODL ZC809L 4.63V 低CMOS AAAA ZC810L 4.63V 高CMOS AGAA ZC803M 4.38V 低OD AODM ZC809M 4.38V 低CMOS ABAA ZC810M 4.38V 高CMOS AHAA ZC803J 4.00V 低OD AODJ ZC809J 4.00V 低CMOS CWAA ZC810J 4.00V 高CMOS CXAA ZC803T 3.08V 低OD AODT ZC809T 3.08V 低CMOS ACAA ZC810T 3.08V 高CMOS AJAA ZC803S 2.93V 低OD AODS ZC809S 2.93V 低CMOS ADAA ZC810S 2.93V 高CMOS AKAA ZC803R 2.63V 低OD AODR ZC809R 2.63V 低CMOS AFAA ZC810R 2.63V 高CMOS ALAA ZC803Z 2.32V 低OD AODZ ZC809Z 2.32V 低CMOS AEAA ZC810Z 2.32V 高CMOS AMAA 注一：OD表示漏极开路输出注二：如需要其它的复位阈值，请与本公司销售人员联系。
订购信息订购代码=器件型号+封装代码器件型号：参考器件功能一览表封装代码：A：表示SOT23-3封装B：表示SOT23-5封装功能框图图一 功能框图（漏极开路输出）图二 功能框图（CMOS输出）管脚描述管脚序号SOT23-3 SOT23-5符号 功能描述1 1 GND 地(ZC803/809)漏极开路复位输出（ZC803）或CMOS 复位输出（ZC809）。
如果V CC 的电压低于复位阈值，则此管脚为低电平，为复位有效状态；在V CC电压上升到高于V RES + V HYST 后，此管脚将维持至少140毫秒的低电平，然后转为高电平。
2 3RESET（ZC810）CMOS复位输出。
如果V CC 的电压低于复位阈值，则此管脚为高电平，为复位有效状态；在V CC 电压上升到高于V RES + V HYST 后，此管脚将维持至少140毫秒的高电平，然后转为低电平。
3 2V CC 电源正输入端。
此管脚的电压既是内部电路的工作电源，也是被监测的电压。
4 NC 没有连接5 NC 没有连接极限参数管脚电压（相对于地） V CC ………………… -0.3V to +6.0V , RESET ….... -0.3V to +6.0V管脚电流V CC ......................................... 20mA , RESET ..…….…..... 20mA热阻……………..………………….. 300°C/W工作环境温度……….…..…….. -40 to +85°C存储温度.....……..…………..... -65 to +150°C 焊接温度（10秒）…………….......... +300°C 静电放电电压(HBM) …………………… 2KV（特别说明：超出以上所列的极限参数可能造成器件的永久损坏。
以上给出的仅仅是极限范围，在这样的极限条件下工作，器件的技术指标将得不到保证，长期在这种条件下还会影响器件的可靠性）Copyright @ 2006, Ztech TechnologyZTech4电气参数（除非另外注明，V CC =3V ，T A = －40℃ 到 85℃, 典型值在T A =25℃时测得）参数符号 测试条件 最小 典型 最大 单位 最大电源电压 V CCMAX 5.5 伏特最小电源电压 V CCMIN1.15 伏特V CC =2.0V1.4 4.4V CC =3.0V1.6 5 I VCC 工作电流V CC =5.0V 1.85 6微安 ZC8__L 4.51 4.63 4.75 ZC8__M 4.25 4.38 4.5 ZC8__J3.94.00 4.1ZC8__T3.0 3.08 3.15 ZC8__S 2.86 2.93 3.0 V RES 复位阈值ZC8__R 2.56 2.63 2.7 ZC8__Z 2.26 2.32 2.38伏特 复位阈值的温度系数TC±100 ppm复位阈值迟滞 V HYST 0.01V RES 伏特 V CC 到延时(ZC803/809)V CC 从V RES +0.1V 转变到V RES －0.1V 20微秒V CC 到RESET 延时(ZC810) V CC 从V RES +0.1V 转变到V RES －0.1V 20微秒V CC =2V , V RES >2V I SINK =1.5mA0.3V CC =3V , V RES >3V I SINK =3.2mA0.3输出低电压(ZC803/809)V OLV CC =4V , V RES >4V I SINK =5mA0.3伏特 V CC =3V , V RES <3V I SOURCE =1.2mA V CC -0.4 V CC =4V , V RES <4V I SOURCE =2mA V CC -0.4输出高电压 (ZC809) V OH伏特V CC =5V , V RES <5V V CC -0.4I SOURCE =2.5mACopyright @ 2006, Ztech TechnologyZTech5参数符号测试条件最小典型 最大 单位V CC =3V, V RES <3VI SINK =3.2mA0.3 V CC =4V, V RES <4V I SINK =5mA0.3 RESET 输出低电压(ZC 810)V OLV CC =5V, V RES <5V I SINK =6mA0.3伏特 V CC =2V, V RES >2V I SOURCE =600uA V CC -0.4 V CC =3V, V RES >3V I SOURCE =1.2mA V CC -0.4 RESET 输出高电压(ZC810) V OHV CC =4V, V RES >4V I SOURCE =2mA V CC -0.4伏特复位输出脉冲宽度T RES140 240 500 毫秒漏电流ZC803，V CC >V RES ,1 微安注：每个器件在生产时都通过室温下的成品测试；整个温度范围的技术指标通过6-sigma 的质量控制方法和设计得到保证。
典型工作曲线Copyright @ 2006, Ztech TechnologyZTech6详细描述ZC803/809/810系列电路主要用于监测微处理器、微控制器、存储器等数字电路的电源，并在上电，掉电或者电源电压低于复位阈值时提供复位信号，确保它们运行在可知的状态，避免错误代码的执行。
该电路内部包含电压比较器、低功耗电压基准源、分压器、输出延时电路和输出驱动电路。
ZC803/809/810系列电路在电源电压低于复位阈值时将输出有效的复位信号，在电源电压上升到高于复位阈值与复位阈值迟滞之和以后，复位输出将至少维持140毫秒的有效状态。
ZC803提供漏极开路输出，在实际应用中需通过上拉电阻将复位输出连接到电源端，此电源的电压可为0V到6V之间的任意值。
ZC809/810提供CMOS输出。
ZC803/809提供低有效的复位输出，而ZC810提供高有效的复位输出。
在设计上保证短时间的电源突降不会影响复位输出。
在整个温度范围内，当电源电压低至1.15V时仍能保证可靠输出。
图3清楚地说明了本系列电路的工作原理：图3 时序图应用信息电压短时间突降VCC除了在电源上电，掉电或者电源电压低于复位阈值时提供有效的复位信号外，ZC803/809/810系列电路对电源电压的短时间突降有过滤功能，即电源电压在很短时间内低于复位阈值不会产生复位信号。
随着电源电压突降的幅度增加（变得比复位阈值更低），不产生有效复位信号的脉冲宽度将减小。
通常情况下，当电源电压比复位阈值低100毫伏的时间小于10微秒时，将不会产生有效的复位输出。
在靠近V管脚的地方加一个0.1uF的旁路电容将增强对电源电压短CC时间突降的过滤能力。
在V CC=0V时，保证有效的复位信号输出在V降到1.15V以下时，ZC809的低有效复位输出信号不再下拉电流，复位输出信号处于不CC确定状态。
在大多数应用中，这不会引起任何问题，因为单片机等电路在电源电压低至 1.15V小于1.15V时有一个确定的状态，可以在复位输时已经不能工作。
为了使复位输出信号在VCC出端和地之间接一个下拉电阻，如图4所示。
此下拉电阻的值在100千欧姆左右，通常不能太7Copyright @ 2006, Ztech Technology ZTech大，否则起不到下拉作用；也不能太小，否则正常工作时会影响复位输出状态。
之间接一个100千欧姆的电阻，使得在电对于ZC810系列电路，也可以通过在复位输出端和VCC源电压低于1.15V时，仍能输出有效的复位信号。