20VB中文资料
VB336中文资料
RF Products Divisions:Select A DivisionSearch The Vitelec Electronics Parts Database:Viewing BNC Series PartDescriptionTOBNC10-58Twist-On BNC Plug For RG58 RG142>> more info TOBNC10-59/62Twist-On BNC Plug For RG59 RG62>> more info TOBNC10-62T Twist-On BNC Plug For RG223 RG302>> more info TOBNC10-6B Twist-On BNC Plug For Belden 9114>> more info TOBNC10-6M Twist-On BNC Plug For RG304 PSF1/8>> more info TOBNC10-8281Twist-On BNC Plug For RG6 URM115>> more info TOBNC20-58Twist-On BNC R/A Plug For RG58 RG142>> more info TOBNC20-59/62Twist-On BNC R/A Plug For RG59 RG62>> more info TOBNC20-59M Twist-On BNC R/A Plug For Catv59>> more info TOBNC20-62T Twist-On BNC R/A Plug For RG223>> more info TOBNC20-6M Twist-On R/A BNC Plug For RG304>> more info TOBNC30-58Twist-On BNC Jack For RG58 RG142>> more info TOBNC30-59/62Twist-On BNC Jack For RG59 RG62>> more info TOBNC30-62T Twist-On BNC Jack For RG223 RG302>> more info TOBNC30-6M Twist-On BNC Jack For RG304 PSF1/8>> more info TOBNC30-8281Twist-On BNC Jack For RG6 URM115>> more info TOBNC40-58Twist-On BNC B/H Jack For RG58>> more info TOBNC40-59/62Twist-On BNC B/H Jack For RG59 62>> more info TOBNC40-62T Twist-On BNC B/H Jack For RG223>> more info TOBNC40-6M Twist-On BNC B/H Jack For RG304>> more info TOBNC40-8281Twist-On BNC B/H Jack For RG6>> more info VB-DC BNC Dust Cap With Chain >> more info VB10-2019BNC Crimp Plug RG214>> more info VB10-2020BNC Crimp Plug RG11>> more info VB10-2021BNC Crimp Plug RG6 Belden 8281>> more info VB10-2022BNC Crimp Plug Bicc 3627 Cable >> more info VB10-2023BNC Crimp Plug RG213>> more info VB10-2025BNC Crimp Plug CT125 H47 75Ohm >> more info VB10-2026BNC Crimp Plug For Belden 8281>> more info VB10-2027BNC Crimp Plug 75 Ohms PSF1/2>> more info VB10-2029BNC Crimp Plug For CT100 H109F >> more info VB10-2031BNC Crimp Plug RG59>> more info VB10-2032BNC Crimp Plug Belden 9275>> more info VB10-2033BNC Crimp Plug BT2003>> more info VB10-2034BNC Crimp Plug For CT100 Lsoh>> more info connectorsVB335-75BNC PCB Mount Jack 23.2Mm 75 Ohm>> more info VB336BNC PCB Mount Jack 18.2Mm>> more info VB336-75BNC PCB Mount Jack 18.2Mm>> more info VB40-2021BNC B/Head Jack RG6>> more info VB40-2031BNC B/Head Jack RG59>> more info VB40-2037BNC B/Head Jack PSF1/3>> more info VB40-2050BNC B/Head Jack RG142 223 400>> more info VB40-2051BNC B/Head Jack RG58>> more info VB40-2061BNC B/Head Jack RG179/187>> more info VB40-2062BNC B/Head Jack RG179/BT3002 Straight>> more info VB40-2071BNC B/Head Jack RG174 Tapered>> more info VB40-2072BNC B/Head Jack RG174 Straight>> more info VB40-2075BNC B/Head Jack BT2002>> more info VB40-2077BNC B/Head Jack Mini RG59 Nek W0407>> more info VB40-2079BNC B/Head Jack L910-34 L910-39>> more info VB40-2087BNC B/Head Jack Triple Coax>> more info VB50-2031BNC Crimp Flange Mount Jack RG59>> more info VB50-2050BNC Crimp Flange Mount Jack RG223>> more info VB50-2051BNC Crimp Flange Mount Jack RG58>> more info VB50-2061BNC Crimp Flange Mount Jack RG179>> more info VB50-2071BNC Crimp Flange Mount Jack RG174>> more info VB511BNC Flange Mount Jack Rec>> more info VB512BNC Flange Mount Jack Rec Thr Holes>> more info VB519BNC Chassis Mount Plug Recepticle>> more info VB60-2051BNC B/Head Jack RG58 Front Entry>> more info VB60-2061BNC B/Head Jack RG179-Front Entry>> more info VB60-2062BNC B/Head Jack BT3002 Front Entry>> more info VB60-2071BNC B/Head Jack RG174-Front Entry>> more info VB60-2072BNC B/Head Jack RG174-Front Entry>> more info VB60-2081BNC B/Head Jack RG178-Front Entry>> more info VBA100-1BNC B/Head Jack-Jack Adaptor>> more info VBA100-1-75BNC B/Head Jack-Jack Adaptor 75 Ohm>> more info VBA100-2BNC Flange Mount Jack/Jack Adaptor>> more info VBA107BNC Plug-Jack R/A Adaptor>> more info VBA108BNC Plug-Plug Adaptor>> more info VBA109BNC Plug-Jack-Jack T Adaptor>> more info VBA110BNC Jack-Jack-Jack T Adaptor>> more info VBA111BNC Plug-Jack-Jack Goalpost>> more info VBA112BNC Plug-Jack-Jack F Style>> more info VBA122BNC Plug-Jack-Jack R/A Adaptor>> more info VBA90-1BNC Jack-Jack Adaptor>> more info VBA90-1-75BNC Jack-Jack Adaptor 75 Ohm>> more info VBF201BNC Filter Right Angle With Posts>> more info VBF201-75BNC Filter Right Angle With Posts>> more info VBF202BNC Filter Right Angle With Screws>> more info VBF211BNC Filter Right Angle Low Pro>> more info VBF211-75BNC Filter Right Angle Low Pro>> more infoVBF301BNC Filter Vertical With Posts>> more info VBF301-75BNC Filter Vertical With Posts>> more info VBF302BNC Filter Vertical With Screws>> more info VBF402BNC Filter PCB Surface Mount Jack>> more info VBF402-75BNC Filter PCB Surface Mount Jack>> more info VBF404BNC Filter PCB Surface Mount Jack>> more info VBF404-75BNC Filter PCB Surface Mount Jack>> more info VBI10-2031BNC Isolated Crimp Plug RG59>> more info VBI10-2051BNC Isolated Crimp Plug RG58>> more info VBI100-1BNC Isolated Jack - Jack B/H>> more info VBI100-1-75BNC Isolated Jack - Jack B/H>> more info VBI107BNC Isolated Plug - Jack R/A>> more info VBI109BNC Isolated Plug - Jack - Jack>> more info VBI109-2BNC Isolated Plug - Jack - Jack>> more info VBI1094A BNC Isolated Panel Mount Jack>> more info VBI1094A-75BNC Isolated Panel Mount Jack 75Ohm>> more info VBI18-2031BNC Isolated Crimp Plug RG59 Grey>> more info VBI18-2051BNC Isolated Crimp Plug RG58 Biege>> more info VBI20-2031BNC Isolated R/A Crimp Plug RG59>> more info VBI20-2051BNC Isolated R/A Crimp Plug RG58>> more info VBI201BNC Isolated R/A PCB Mount Jack W/P>> more info VBI201-75BNC Isolated R/A PCB Mount Jack W/P>> more info VBI202BNC Isolated R/A PCB Mount Jack W/S>> more info VBI211BNC Isolated R/A PCB Mount Jack W/P>> more info VBI211-75BNC Isolated R/A PCB Mount Jack W/P>> more info VBI212BNC Isolated R/A PCB Mount Jack W/S>> more info VBI28-2051M BNC Isol R/A Crimp Plug Grey RG58>> more info VBI30-2031BNC Isolated Crimp Jack RG59>> more info VBI30-2051BNC Isolated Crimp Jack RG58>> more info VBI301BNC Isolated Vert PCB Mount Jack Wp>> more info VBI301-75BNC Isolated Vert PCB Mount Jack Wp>> more info VBI302BNC Isolated Vert PCB Mount Jack Ws>> more info VBI40-2031BNC Isolated Crimp B/H Jack RG 59>> more info VBI40-2051BNC Isolated Crimp B/H Jack RG 58>> more info VBI402BNC PCB Surface Mount Jack Straddle>> more info VBI402-75BNC PCB Surface Mount Jack Straddle>> more info VBI404BNC PCB Surface Mount Jack Straddle>> more info VBI404-75BNC PCB Surface Mount Jack Straddle>> more info VBI501BNC Dual R/A PCB Jack Captive Posts>> more info VBI90-1BNC Isolated Jack - Jack Adaptor>> more info VBM201BNC Shielded R/A PCB Mount Jack Emc>> more info VBM201-75BNC Shielded R/A PCB Mount Jack Emc>> more info VBM201C BNC Shielded R/A PCB Mount Jack Emc>> more info VBM201C-75BNC Shielded R/A PCB Mount Jack Emc>> more info VBM211BNC Shielded R/A PCB Mount Jack Emc>> more info VBM211-1502BNC Shielded R/A PCB Mount Jack Emc>> more info VBM211-75BNC Shielded R/A PCB Mount Jack Emc>> more infoVBM211C-75Low Profile BNC Shielded R/A PCB>> more infoVBM221BNC Shielded R/A PCB Mount Jack Emc>> more infoVBM221-75BNC Shielded R/A PCB Mount Jack Emc>> more infoVBM221-75-1502BNC Shielded R/A PCB Mount Jack Emc>> more infoVBM301BNC Shielded Ver PCB Mount Jack Emc>> more infoVBM301-75BNC Shielded Vert PCB Mount Jack>> more infoVBM501BNC Dual R/A PCB Jack Captive Posts>> more infoVBM511R/A P.C.B. Flush Mount Shielded BNC>> more infoVBM511-1502R/A P.C.B. Flush Mount Shielded BNC>> more infoVBM511-75R/A P.C.B. Flush Mount Shielded BNC>> more infoVBM511-75-1502R/A P.C.B. Flush Mount Shielded BNC>> more infoVBS10-2020BNC Clamp Plug RG213>> more infoVBS10-2021BNC Clamp Plug R/A519>> more infoVBS10-2031BNC Clamp Plug RG59>> more infoVBS10-2031/1BNC Clamp Plug RG59>> more infoVBS10-2051BNC Clamp Plug RG58>> more infoVBS10-2051/1BNC Clamp Plug RG58>> more infoVBS10-2061BNC Clamp Plug RG179/187>> more infoVBS10-2071BNC Clamp Plug RG174/188/316>> more infoVBS20-2031BNC R/A Clamp Plug For RG59>> more infoVBS20-2051BNC R/A Clamp Plug For RG58>> more infoVBS40-2031Clamp BNC B/Head Jack RG59>> more infoVBS40-2051Clamp BNC B/Head Jack RG58>> more infoVBS50-2031Clamp BNC Flange Jack RG59>> more infoVBS50-2051Clamp BNC Flange Jack RG58>> more infoVBS50-2061Clamp BNC Flange Jack RG179>> more infoVBS50-2071Clamp BNC Flange Jack RG174>> more info Home | © 2002 Vitelec Electronics Website。
PI90LV01中文资料
1. All voltage values, except differential I/O bus voltages, are with respect to ground terminal.
Dissipation Rating Table
Package T
@
TA ≤ 2 5 ° C Powe r Rating 385mW
• • • • • • • •
Applications
Applications include point-to-point (single termination) and multipoint (double termination) baseband data transmissions over controlled impedance media . The transmission media can be printed circuit board traces, backplanes, or cables. The PI90LV01 and companion line receivers (PI90LV02 and PI90LVT02) provide new alternatives to RS-232, PECL and ECL-to-point interface applications.
Notes: † Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to AbsoluteMaximum-Rated conditions for extended periods may affect device reliability.
2EB资料
6.35 4.78
Slot: .07 x .16
1.8 x 4.1
3VB3, 3EB3 5VB3, 5EB3 10VB1, 10EB1 10VB3, 10EB3 10VB6 20VB1, 20EB1 20VB6
Mounting holes: .188 Dia.(2)
B3
Typical dimensions Wire leads: 4.0 Min.
15 30 38 50 50 50 7 20 25 40 45 48 15 29 35 45 45 48 7 19 23 34 37 42
B 14
EB Models 1A, 3A 2A, 5A, 10A, 20A
VB6.0中文技巧
VB6.0中文技巧在Visual Basic中，文本框（TextBox）是最常用的控件，熟练运用文本框是开发出高质量的应用程序的基础。
笔者在从事应用程序开发中，摸索出有关文本框的应用技巧，写出来与VB爱好者共享。
1、设置只读文本框。
有些时候在窗口显示一段信息，但又不希望用户去改变它，怎样实现文本的只读呢？首先，我们可以利用标签框（label ）的只读属性，以标签来代替文本框以实现只读属性，但也可以用小程序实现真正的文本框的只读。
Sub Text1_KeyPress (keyascii As Integer)keyascii = 0End Sub或者也可以用sendkey方法使文本框失去焦点，如以下程序：Sub Text1_KeyDown (KeyCode As Integer, Shift As Integer)SendKeys "{tab}"End Sub2、限定文本框的输入内容和格式。
以下程序可以实现限定文本框只能输入数字：Sub Text1_KeyPress (keyascii As Integer)If keyascii <48 Or keyascii> 57 ThenBeepBeepjohny@keyascii = 0End IfEnd Sub若想限定文本框输入格式，可以使用VB的FORMA T函数，也可以使用专业版的屏蔽控件(Masked Edit)，通过设定屏蔽控件的Mask属性可以对文本框的输入格式作精确控制。
3、为TextBox 创建快捷键。
VB规定，添加在窗体上的控件均在其Tabindex 属性中记载其加载顺序，程序运行时焦点按Tabindex 属性规定的顺序在控件间跳转。
而为了简化操作，可VB中为任何具有caption的属性的控制创建快捷键，这通过caption 属性中在想作为快捷键的字母前加&号实现。
但有一个问题值得注意，而类似文本框这样的控件无caption 这样的属性，这时可将标签与文本框同时使用。
ECJZEB1H102K中文资料
K E
M
元器件交易网
Multilayer Ceramic Capacitors (For General )
Standard Products for Type “11” (EIA “0603”) , Taped Version
Class 1
ECJ1VC1H0R5C ECJ1VC1H010 ECJ1VC1H1R5 ECJ1VC1H020 ECJ1VC1H030 ECJ1VC1H040 ECJ1VC1H050 ECJ1VC1H060D ECJ1VC1H070D ECJ1VC1H080D ECJ1VC1H090D ECJ1VC1H100 ECJ1VC1H120 ECJ1VC1H150 ECJ1VC1H180 ECJ1VC1H220 ECJ1VC1H270 ECJ1VC1H330 ECJ1VC1H390 ECJ1VC1H470 ECJ1VC1H560 ECJ1VC1H680 ECJ1VC1H820 ECJ1VC1H101 ECJ1VC1H121 ECJ1VC1H151 ECJ1VC1H181 ECJ1VC1H221 ECJ1VC1H271 ECJ1VC1H331 ECJ1VC1H391 ECJ1VC1H471 ECJ1VC1H561 ECJ1VC1H681 ECJ1VC1H821 ECJ1VC1H102
元器件交易网
Multilayer Ceramic Capacitors (For General )
Features
Recommended Applications
Class 1 (T.C. Type)
Class 2 (Hi-K Type)
Precautions for Handling
Class 2
ECJZEB1H151 ECJZEB1H221 ECJZEB1H331 ECJZEB1H471 ECJZEB1H681 ECJZEB1H102
VF20150SG中文资料
V20150SG, VF20150SG, VB20150SG & VI20150SGVishay General SemiconductorDocument Number: 89060For technical questions within your region, please contact one of the following:High-Voltage Trench MOS Barrier Schottky RectifierUltra Low V F = 0.57 V at I F = 5 AFEATURES•Trench MOS Schottky technology •Low forward voltage drop, low power losses •High efficiency operation•peak of 245 °C (for TO-263AB package) •Solder dip 260 °C, 40 s (for TO-220AB, ITO-220AB and TO-262AA package) •Component in accordance to RoHS 2002/95/EC and WEEE 2002/96/EC TYPICAL APPLICATIONSFor use in high frequency inverters, switching power supplies, freewheeling diodes, OR-ing diode, dc-to-dc converters and reverse battery protection.MECHANICAL DATACase: TO-220AB, ITO-220AB, TO-263AB and TO-262AAEpoxy meets UL 94V-0 flammability ratingTerminals: Matte tin plated leads, solderable per J-STD-002 and JESD22-B102E3 suffix for consumer grade, meets JESD 201 class 1A whisker test Polarity: As markedMounting Torque: 10 in-lbs maximumPRIMARY CHARACTERISTICSI F(AV)20 A V RRM 150 V I FSM 140 A V F at I F = 20 A 0.77 V T J max.150 °C123NCA KMAXIMUM RATINGS (T A = 25°C unless otherwise noted)PA AMETESYMBOL V20150SG VF20150SGVB20150SGVI20150SGUNIT Maximum repetitive peak reverse voltage V RRM 150VMaximum average forward rectified current (Fig. 1)I F(AV)20APeak forward surge current 8.3 ms single half sine-wave superimposed on rated load I FSM 140 A Isolation voltage (ITO-220AB only)from terminal to heatsink t = 1 minV AC 1500V Operating junction and storage temperature rangeT J , T STG- 55 to + 150°CV20150SG, VF20150SG, VB20150SG & VI20150SGVishay General Semiconductor For technical questions within your region, please contact one of the following:Document Number: 89060Notes:(1) Pulse test: 300 µs pulse width, 1 % duty cycle (2) Pulse test: Pulse width ≤ 40 msRATINGS AND CHARACTERISTICS CURVES (T A = 25 °C unless otherwise noted)ELECTRICAL CHARACTERISTICS (T A = 25°C unless otherwise noted)PA AMETE TEST CONDITIONS SYMBOL TYP.MAX.UNITBreakdown voltageI R = 1.0 mA T A = 25 °C V BR150 (minimum)-VInstantaneous forward voltage (1)I F = 5 AI F = 10 A I F = 20 A T A = 25 °CV F0.720.871.24--1.60VI F = 5 A I F = 10 A I F = 20 A T A = 125 °C 0.570.650.77--0.84Reverse current (2)V R = 100 VT A = 25 °C T A = 125 °C I R1.52--µA mA V R = 150 VT A = 25 °C T A = 125 °C-420020µA mATHERMAL CHARACTERISTICS (T A = 25°C unless otherwise noted)PA AMETE SYMBOL V20150SG VF20150SG VB20150SGVI20150SGUNITTypical thermal resistanceR θJC2.04.02.02.0°C/WORDERING INFORMATION (Example)PACKAGE PREFERRED P/N UNIT WEIGHT (g)PACKAGE CODEBASE QUANTITYDELIVERY MODETO-220AB V20150SG-E3/4W 1.884W 50/tube T ube ITO-220AB VF20150SG-E3/4W 1.754W 50/tube T ube TO-263AB VB20150SG-E3/4W 1.384W 50/tube T ube TO-263AB VB20150SG-E3/8W 1.388W 800/reel T ape and reelTO-262AAVI20150SG-E3/4W1.454W50/tubeT ubeFigure 1. Maximum Forward Current Derating CurveFigure 2. Forward Power Loss CharacteristicsV20150SG, VF20150SG, VB20150SG & VI20150SGVishay General SemiconductorDocument Number: 89060For technical questions within your region, please contact one of the following:Figure 3. Typical Instantaneous Forward Characteristics Figure 4. Typical Reverse Characteristics Figure 5. Typical Junction CapacitanceFigure 6. Typical Transient Thermal ImpedanceFigure7. Typical Transient Thermal ImpedanceV20150SG, VF20150SG, VB20150SG & VI20150SGVishay General Semiconductor For technical questions within your region, please contact one of the following:Document Number: 89060PACKAGE OUTLINE DIMENSIONS in inches (millimeters)Disclaimer Legal Disclaimer NoticeVishayAll product specifications and data are subject to change without notice.Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product.Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products.No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay.The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.Product names and markings noted herein may be trademarks of their respective owners.元器件交易网Document Number: 。
ATC20中文资料
Voltage Levels
The IO18lib library is made up exclusively of low-voltage chip interface circuits powered by a voltage in the range of 1.65V to 1.95V. The library is compatible with the SClib 1.8-volt standard cells library.
•
DEPRQx • DENRQx
DENRBx
DECRQx
•
Enabled D Input
• • • •
1x Drive
• • • • • • • • • • •
2x Drive
• • • • • • • • • • •
Single Output
•
• • • •
Table 5. Scan Flip-flops
NOR Gate OR-AND-Invert Gate OR-AND-OR-Invert Gates OR Gate OR-AND Gate
Multiplexed Scan D Flip-Flop Multiplexed Scan Enable D Flip-Flop Set/Reset Latches with NAND input Subtractor Exclusive NOR Gate Exclusive OR Gate
Cell-based ASIC ATC20 Summary
Rev. 1361AS–04/00
1
元器件交易网
Standard Cell Library SClib
The Atmel Standard Cell Library, SClib, contains a comprehensive set of combinational logic and storage cells. The SClib library includes cells which belong to the following categories: • Buffers and Gates • Multiplexers • Flip-flops • Scan Flip-flops • Latches • Adders and Subtractors
纸币器BV20中文技术手册
BV20-1 Operations Manual
Innovative Technology Limited ® 智能化纸币识别
技术支持：上海威佛微电子有限公司
Operations Manual
BV20-1
使用手册
BV20-1
Page 1 of 22
®
© Copyright Innovative Technology Limited 2007
电流，电压
供电电压 MDB IF5 供电电压 输入纹波电压 供电电流: 休眠电流 (低电压模式) 待机 工作 峰值
最小 +11V +18V
0
表格 Байду номын сангаас – 电源要求
最大 +15V +48V DC or 34V AC 0.25V @100 Hz
1.2mA 150mA 540mA 1700mA
接口电平 输入
带 2K2 上拉电阻的输出 最大下沉电流
低电平 0V To +0.5V
0.6V 50mA
表格 3 – 接口电平
高电平 +3.7 V +12V 主控板的上拉电平
Page 4 of 22
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© Copyright Innovative Technology Limited 2007
BV20-1 使用手册
DB3中文资料_数据手册_参数
万联芯城-电子元器件采购网，提供一站式 配套，解决物料烦恼，万联芯城销售IC电子元器件，芯片，电 阻，电容，二极管，三极管等多种类别，现货型号能够满足各 种物料需求，只需提交BOM物料清单，我们将为您报出一个 满意的价格，万联芯城完善的供应链体系能够满足多种报价需 求，为客户节省成本，点击进入万联芯城。
A4988_中文资料
责任声明：1.该文章为在校研究生借助于谷歌翻译等工具自行翻译为中文资料，不代表官方意愿。
2.该文章只能用于学习交流之用，不可用于一切商业用途，否则后果自负，本作者不承担任何责任。
3.由于作者水平有限，难免有错误之处，此文章只做参考，以英文官方文献为准。
由于参考本文内容所造成的损失，后果自行承担。
4.如有侵权，请及时联系我删除。
QQ：7820202555.最后修改时间：2018.08.02A4988一、特色和优点1.低输出阻抗R DS（ON）2.自动检测/选择电流衰减模式3.混合和慢电流衰减模式4.同步整流，实现低功耗5.内部UVLO6.交叉电流保护7. 3.3和5V兼容逻辑电源8.热关断电路9.短路保护10.负载短路保护11.五种可选步进模式：全步，1/2,1/4,1/8和1/16二、封装28触点QFN封装，外部导热垫5mm×5mm×0.90mm（ET封装）。
三、描述A4988是一款完整的微步电机驱动器，内置转换器，操作简便。
它设计用于以全步，半步，四分之一，八分之一和十六分之一步模式操作双极步进电机，输出驱动能力高达35V 和±2A电流。
A4988包括一个固定的关断时间电流调节器，能够在慢速或混合衰减模式下工作。
翻译是轻松实现A4988的关键。
只需在STEP引脚上输入一个脉冲就可以驱动电机一个微步。
不需要相序表，高频控制线或复杂的编程接口。
A4988非常适合复杂微处理器不可用或负担过重的应用。
在步进操作期间，A4988中的斩波控制器自动选择当前衰减模式，慢速或混合。
在混合衰减模式中，设备最初设置为固定关闭时间的一部分的快速衰减，然后设置为关闭时间的剩余部分的缓慢衰减。
混合衰减电流控制可降低可听到的电机噪声，提高步进精度并降低功耗。
四、典型应用图微控制器或控制器逻辑五、说明（续）提供内部同步整流控制电路以改善PWM操作期间的功率耗散。
内部电路保护包括：具有迟滞的热关断，欠压锁定（UVLO）和交叉电流保护。
Z201T250R00VB中文资料(vishay)中文数据手册「EasyDatasheet - 矽搜」
没有执照,明示或暗示,禁止反言或其他方式,向任何知识产权授予本文件任何行为 .
本文所示产品不用于医疗,生命救护或生命维持应用程序,除非 另有明确指示.使用或销售Vishay产品客户没有明确指出在这种使用 应用这样做完全按照自己风险 ,并同意全额赔偿为引起或造成任何损坏 从上述使用或销售.请Vishay授权人员触点,以获得有关书面条款及条件 产品设计用于这样应用.
序都可以和所有预期压力,必须考虑到安定在一个特定测试程序之前.我们应用工程部门可以讨论和推荐合适 力和稳定性要求全方位.
文件编号：63113
修订：19-APR-07
3
芯片中文手册,看全文,戳
Z201（Z箔）
Vishay箔电阻
超高精度Z箔电阻与TCR ±0.05 PPM /℃,5 ppmPCR,在额定功率,容差
例如：上述全球ORDER Y1453 250R000 V 9 L：
类型：Z201 价值：250.0 绝对公差：±0.005％ 终止：铅（Pb） - 免费
包装：散装
历史部分号码： Z201T 250R00 VB（将继续被使用）
Z201
T
模型
Z201 Z201L
终止
T = Pb 无= /
电阻容差
V = ± 0.005 % T = ± 0.01 % Q = ± 0.02 % A = ± 0.05 % B = ± 0.1 % C = ± 0.25 % D = ± 0.5 % F = ± 1.0 %
74LS248中文资料
存储温度 ………………………………………….
功能表：
5.5V 7V 1mA
-55~125℃ 0~70℃ -65~150℃
推荐工作条件：
电源电压 Vcc
54 74
输入高电平电压ViH
输入低电平电压
54
ViL
74
输出高电平电流 IOH
a~g /BI(/RBO)
54248/74248 最小 额定 最大
4.5
VOH输出高电平电压
Vcc＝最小，VIL＝最大， VIH=2V，IOH＝最大
Io 输出电流 a~g
Vcc=最小，VIL＝最大， VIH=2V,Vo=0.58V
VOL输出低电平电压
Vcc=最小，VIL＝最 大，VIH=2V,IOL=最大
54 74
II最大输入电压时输 入电流
除 BI/RBO
Vcc＝最大
平，脉冲消隐输出(/RBO)为低电平。 当 BI 为高电平开路时，/L T 的低电平可使 a～g 为高电平。 248 与 48 的引出端排列，功能和电特性分别相同，差别仅在显示的字形 6 和 9，
248 的为 和 ，48 为 和 。
引出段符号： A,B,C,D /BI，/RBO
/LT /RBI a~g 外引线排列:
译码地址输入端 消隐输入（低电平有效） 脉冲消隐输出（低电平有效） 灯测试输入端（低电平有效） 脉冲消隐输入端（低电平有效） 段输出（低电平有效）
ｈｔｔｐ：／／ｗｗｗ．ｅｌｅｃｆａｎｓ．ｃｏｍ
ＩＣ资料查询网站：
电子工程技术论坛：
逻辑图:
极限值: 电源电压 输入电压
…………………………………………. 7V
IOL 6.4mA 2mA 6mA
VB 6.0 中文版教程
再加入一个标签Label2，修改Caption为“姓名：”，同样修改颜色、字体属性，在ToolsTipText中输入“这儿显示姓名”。
本节主要讲述了VB的基本窗口和窗体属性，以后会经常用到。
二、工具箱里的控件
一个程序的窗口是由许多对象组成的，在VB中这些对象被称作控件，控件都放在工作区左侧的工具箱内，我们用这些控件可以组合出不同的程序来。
首先箭头工具是用来选择、移动、缩放对象的，默认的就是选择工具。
找到工具箱中的文本框控件，在工作区中画一个文本框对象，默认的名称是Text1，修改Font字体属性，Text属性先不改，修改ToolTipText属性为“这是第一个文本框”。
将窗体中的各个对象调整得大方美观。以“文本框”（或者英文的MyText）为文件名，保存文件到自己的文件夹
单击工具栏上的“启动”按钮运行程序，看一下文本框，里面有Text1和一个闪烁的插入光标，把鼠标移过去会有一行提示“这是第一个文本框”。
（1）“文件”菜单，要求记住“保存”命令，VB要保存两次，注意保存文件到自己的文件夹中。（本书中双引号当中均是指操作命令）
（2）“视图”菜单，显示各个窗口，如果一个窗口找不着了，就到这个菜单中找出来。
（3）“运行”菜单，第一个“启动”命令要记住，可以运行我们的程序。
3、工具栏：第三行是工具栏，工具栏是一些最常用的命令，而且是用图标表示的，因而便于形象记忆和操作，要求记住“启动”按钮。（在视窗操作系统中，我们不仅要会认识文字说明，还要特别留意图标含义。）
关闭程序回到属性窗口，找到Picture属性，在右边的格子里单击一下鼠标左键，打开“加载图片”对话框，找一幅较大的背景图片打开，观察一下工作区窗体的变化。单击“启动”按钮运行一下程序，很漂亮的一个窗口是吧？
3972中文资料
DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER
Designed for pulse-width modulated (PWM) current control of bipolar microstepping stepper motors, the A3972SB is capable of continuous output currents to ±1.5 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes.
—
10
Idle mode (D0 = 1, D18 = 0)
—
—
1.5
Sleep mode
—
— 100
Output Drivers
Output Leakage Current Output On Resistance Body Diode Forward Voltage Control Logic
IDSS rDS(on)
VIN ................ -0.3 V to VDD + 0.3 V Reference Voltage, VREF ..................... 3 V Sense Voltage (dc), VS ................ 500 mV Package Power Dissipation,
VB基本语法
VB基本语法培训⽬标：掌握各种基本数据类型以及流程控制语句的语法，感受VB编程。
培训内容：1. VB中的数据类型；2. VB中的常量与变量；3. VB中的运算符；4. VB中的流程控制语句。
课后练习：改进第⼀次培训布置的“计算器”，要求实现四则运算，并充分利⽤流程控制语句来实现语句的改进及对数据长度、数据类型以及除零等异常的防范。
1、VB中的数据类型基本数据类型⽐较特别的有对象类型和变体类型。
Object 对象类型可以简单的理解成为对控件对象的引⽤；Variant 变体类型可以算是VB中的特殊类型，由于它的存在常常让⼈对VB的数据类型检查产⽣误解。
VB在变量声明时，如果不指定变量类型则VB就将为该变量指定为 Variant 类型。
在最常⽤的数据类型中，特别要注意的就是 Integer 整型，之所以要特点注意就是因为它的值域很⼩，在使⽤中可能会产⽣数值溢出，通常的做法是在VB中直接使⽤Long 来替换全部的 Integer 。
表中可以看到有个“类型符”列，它是声明变量类型的简化形式。
⾃定义数据类型 / 枚举类型PPT中只简述了类型的声明语法，实际上这两种类型的⽤处极⼤，通过对它们的使⽤可以让你的程序更加具有有读性和⾯向对象的特点，呵呵。
来看看俺的⽰例代点效果也没有，哎...。
2、VB中的常量与变量常量，在VB中最为常见的就是VB常量；常量的最⼤⽤处就是助记(VB⽀持中⽂，但是中⽂编程也不能滥⽤，因此在常量中使⽤是⽐较好的选择)Public Const单位资料表As String = " DAD6CPP "变量，变量的声明需要注意。
因为VB⽀持隐式声明(就是不声明)和声明时省略数据类型，这两种情况下变量并不是没有类型，⽽是 Variant 类型。
Public Sub doSomthing()x = 1Dim yDim i1, i2, i3 As LongEnd Sub这是三个例⼦，其中的变量 X 和 Y 都是 Variant 类型，这个⽐较看出，注意的是第3⾏声明，这是极易出错的地⽅，只有 i3 是Long，i1、i2 都是 Variant。
FSBB20CH60中文资料
FSBB20CH60 Smart Power Module44mm26.8mmFigure 1.FSBB20CH60 Smart Power ModuleFSBB20CH60 Smart Power Module Pin DescriptionsPin Number Pin Name Pin Description1V CC(L)Low-side Common Bias Voltage for IC and IGBTs Driving2COM Common Supply Ground3IN(UL)Signal Input for Low-side U Phase4IN(VL)Signal Input for Low-side V Phase5IN(WL)Signal Input for Low-side W Phase6V FO Fault Output7C FOD Capacitor for Fault Output Duration Time Selection8C SC Capacitor (Low-pass Filter) for Short-Current Detection Input9IN(UH)Signal Input for High-side U Phase10V CC(UH)High-side Bias Voltage for U Phase IC11V B(U)High-side Bias Voltage for U Phase IGBT Driving12V S(U)High-side Bias Voltage Ground for U Phase IGBT Driving13IN(VH)Signal Input for High-side V Phase14V CC(VH)High-side Bias Voltage for V Phase IC15V B(V)High-side Bias Voltage for V Phase IGBT Driving16V S(V)High-side Bias Voltage Ground for V Phase IGBT Driving17IN(WH)Signal Input for High-side W Phase18V CC(WH)High-side Bias Voltage for W Phase IC19V B(W)High-side Bias Voltage for W Phase IGBT Driving20V S(W)High-side Bias Voltage Ground for W Phase IGBT Driving21N U Negative DC–Link Input for U Phase22N V Negative DC–Link Input for V Phase23N W Negative DC–Link Input for W Phase24U Output for U Phase25V Output for V Phase26W Output for W Phase27P Positive DC–Link InputFSBB20CH60 Smart Power ModuleControl Part Total System Thermal ResistanceNote:2. For the measurement point of case temperature(T C ), please refer to Figure 2.SymbolParameterConditionsRatingUnitsV CC Control Supply Voltage Applied between V CC(UH), V CC(VH), V CC(WH), V CC(L) -COM20V V BS High-side Control Bias VoltageApplied between V B(U) - V S(U), V B(V) - V S(V), V B(W) -V S(W)20V V IN Input Signal Voltage Applied between IN (UH), IN (VH), IN (WH), IN (UL), IN (VL),IN (WL) - COM-0.3~17V V FO Fault Output Supply Voltage Applied between V FO - COM -0.3~V CC +0.3V I FO Fault Output CurrentSink Current at V FO Pin5mA V SCCurrent Sensing Input Voltage Applied between C SC - COM-0.3~V CC +0.3VSymbolParameterConditionsRatingUnitsV PN(PROT)Self Protection Supply Voltage Limit (Short Circuit Protection Capability)V CC = V BS = 13.5 ~ 16.5VT J = 125°C, Non-repetitive, less than 2µs 400V T C Module Case Operation Temperature -20°C ≤ T J ≤ 125°C, See Figure 2-20 ~ 100°C T STG Storage Temperature -40 ~ 125°C V ISOIsolation Voltage60Hz, Sinusoidal, AC 1 minute, Connection Pins to ceramic substrate2500V rmsSymbolParameterCondition Min.Typ.Max.UnitsR th(j-c)Q Junction to Case Thermal ResistanceInverter IGBT part (per 1/6 module) -- 1.63°C/W R th(j-c)FInverter FWD part (per 1/6 module)-- 2.55°C/WNote:4. Short-circuit current protection is functioning only at the low-sides.5. The fault-out pulse width t FOD depends on the capacitance value of C FOD according to the following approximate equation : C FOD = 18.3 x 10-6 x t FOD [F]Recommended Operating ConditionsUV CCR Reset Level 11.212.413.2V UV BSD Detection Level 10.111.312.5V UV BSR Reset Level10.511.712.9V t FOD Fault-out Pulse Width C FOD = 33nF (Note 5)1.0 1.8-ms V IN(ON)ON Threshold Voltage Applied between IN (UH), IN (VH), IN (WH), IN (UL),IN (VL), IN (WL) - COM3.0--V V IN(OFF)OFF Threshold Voltage--0.8VSymbolParameterConditionsValueUnitsMin.Typ.Max.V PN Supply Voltage Applied between P - N U , N V , N W-300400V V CC Control Supply Voltage Applied between V CC(UH), V CC(VH), V CC(WH),V CC(L) - COM13.51516.5V V BSHigh-side Bias VoltageApplied between V B(U) - V S(U), V B(V) - V S(V),V B(W) - V S(W)13.01518.5V DV CC /Dt, DV BS /Dt Control supply variation -1-1V/µst dead Blanking Time for Preventing Arm-short For Each Input Signal 2.5--µsf PWM PWM Input Signal-20°C ≤ T C ≤ 100°C, -20°C ≤ T J ≤ 125°C --20kHz V SENVoltage for Current SensingApplied between N U , N V , N W - COM (Including surge voltage)-44VFSBB20CH60 Smart Power ModuleFSBB20CH60 Smart Power ModuleFSBB20CH60 Smart Power ModuleTRADEMARKSThe following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.FSBB20CH60 Smart Power ModuleDISCLAIMERFAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.LIFE SUPPORT POLICYFAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.As used herein:1. Life support devices or systems are devices or systems which,(a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling,can be reasonably expected to result in significant injury to the user.2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.PRODUCT STATUS DEFINITIONS Definition of TermsDatasheet IdentificationProduct StatusDefinitionAdvance InformationFormative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice.PreliminaryFirst ProductionThis datasheet contains preliminary data, andsupplementary data will be published at a later date.Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.No Identification Needed Full ProductionThis datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.Obsolete Not In ProductionThis datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor.The datasheet is printed for reference information only.FAST ®FASTr™FPS™FRFET™GlobalOptoisolator™GTO™HiSeC™I 2C™i-Lo ™ImpliedDisconnect™IntelliMAX™ISOPLANAR™LittleFET™MICROCOUPLER™MicroFET™MicroPak™MICROWIRE™MSX™MSXPro™OCX™OCXPro™OPTOLOGIC ®OPTOPLANAR™PACMAN™POP™Power247™PowerEdge™PowerSaver™PowerTrench ®QFET ®QS™QT Optoelectronics™Quiet Series™RapidConfigure™RapidConnect™µSerDes™SILENT SWITCHER ®SMART START™SPM™Stealth™SuperFET™SuperSOT™-3SuperSOT™-6SuperSOT™-8SyncFET™TinyLogic ®TINYOPTO™TruTranslation™UHC™UltraFET ®UniFET™VCX™A CEx™ActiveArray™Bottomless™CoolFET™CROSSVOLT ™DOME™EcoSPARK™E 2CMOS™EnSigna™FACT™FACT Quiet Series™Across the board. Around the world.™The Power Franchise ®Programmable Active Droop™Rev. I15。
VB025资料
®
VB025SP
HIGH VOLTAGE IGNITION COIL DRIVER POWER IC
TYPE VB 025 S P
Vc l 380 V
Icl
Id
9A
100 mA
s PRIMARY COIL VOLTAGE INTERNALLY SET s COIL CURRENT LIMIT INTERNALLY SET s LOGIC LEVEL COMPATIBLE INPUT s DRIVING CURRENT QUASI
Coil Current Level T hr es h o ld
REXT = 22 KΩ (see note 3)
Tj = 25oC
CEXT = 1 nF (see figure 1)
4.25
IdiagTD Coil Current Level Threshold Drift
(see figure 3)
(*) Pin 6 must be connected to pins 1-5 externally
ELECTRICAL CHARACTERISTICS (5.3V < Vb < 24V; VCC = 5 V ± 10%; -40oC < Tj < 125oC; Rcoil = 580 mΩ; Lcoil = 3.75 mH; unless otherwise specified; see note 1)
4
VinL Low Level Input Voltage VCC = 5.5V
-0.3
Vin(h ys ) Input Threshold
0.4
Hysteresis
IinH High Level Input Current Vin = 4 V
vb 中文文本加密解密函数
vb 中文文本加密解密函数VB中文文本加密解密函数在VB中，我们经常需要对中文文本进行加密和解密操作，以确保敏感信息的安全性。
本文将介绍如何使用VB编写中文文本加密解密函数，并提供一些常用的加密解密算法供参考。
一、中文文本加密函数加密是将明文转换为密文的过程，使得密文无法直接被读取和理解。
在VB中，我们可以使用一些常见的加密算法来实现中文文本的加密。
下面是一个示例代码：```vbFunction EncryptText(ByVal plainText As String) As StringDim encryptedT ext As String = ""'加密算法的实现代码Return encryptedTextEnd Function```在这个示例代码中，我们创建了一个名为EncryptText的函数，用于对传入的中文明文进行加密，并返回加密后的密文。
具体的加密算法实现代码需要根据实际需求来编写。
常用的中文文本加密算法有：1. 替换加密：将中文文本中的每个字符替换为另一个字符或字符串，从而达到加密的效果。
例如，将中文文本中的每个字母替换为其后第n个字母，n为一个固定的数值。
2. 异或加密：将中文文本中的每个字符与一个密钥进行异或运算，从而得到加密后的字符。
解密时再将密文与密钥进行异或运算，即可得到明文。
3. 移位加密：将中文文本中的每个字符按照一定规则进行移位操作，从而得到加密后的字符。
解密时再按照相同的规则进行逆向移位操作，即可得到明文。
二、中文文本解密函数解密是将密文转换回明文的过程，使得原始信息可以被读取和理解。
在VB中，我们可以使用与加密算法对应的解密算法来实现中文文本的解密。
下面是一个示例代码：```vbFunction DecryptT ext(ByVal encryptedText As String) As String Dim plainText As String = ""'解密算法的实现代码Return plainTextEnd Function```在这个示例代码中，我们创建了一个名为DecryptText的函数，用于对传入的中文密文进行解密，并返回解密后的明文。
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Slot: .07 x .16
1.8 x 4.1
3VB3, 3EB3 5VB3, 5EB3 10VB1, 10EB1 10VB3, 10EB3 10VB6 20VB1, 20EB1 20VB6
Mounting holesions Wire leads: 4.0 Min.
EB Models
.4 mA .7 mA
.21 mA .36 mA 2250 VDC 1450 VDC 50/60 Hz 120/250 VAC
Electrical Schematic
@ 120 VAC
1A 2A 3A 5A 10A 10A 20A 30A
@ 250 VAC
1A 2A 3A 5A 8A 8A 16A 25A
VB3/EB3
10VB6/20VB6
Specifications
VB Models
Maximum leakage current, each line-to-ground @ 120 VAC 60 Hz: @ 250 VAC 50 Hz: Hipot rating (one minute): line-to-ground line-to-line Operating frequency: Rated voltage: Rated current: 1VB/1EB 2VB/2EB 3VB/3EB 5VB/5EB 10VB/10EB 10VB6 20VB/20EB 30VB6
The B series RFI power line filters are general purpose common-mode filters effectively providing RFI control of line-to-ground noise in a small size at low cost. These filters are designed to meet a wide variety of electronic and electrical applications and are available in a broad selection of current ratings and termination styles. The EB models meet the very low leakage current requirements of SEV, VDE portable equipment, and (120 Volt) UL544 nonpatient medical equipment.
Typical dimensions Mounting holes: .188 Dia. (2)
4.78
Torque 18± 2 in.lb.
30VB6
B 15
Libertyville, IL (847) 680-7400
Case Dimensions
Metric shown in italics.
B1
Part No. 1VB1, 1EB1 2VB1, 2EB1 1VB3, 1EB3 2VB3, 2EB3 3VB1, 3EB1 5VB1, 5EB1
Holes: .07 Dia.(4)
1.8
A (max) 2.25 57.2 0.96 24.4 2.61 66.3 1.32 33.5 2.61 66.3 1.32 33.5 2.72 69.1 3.36 85.3 3.46 87.9 5.34 135.6
D ± .015 ± .38 2.125 53.98 2.125 53.98 2.125 53.98 2.125 53.98 2.125 53.98 2.125 53.98 2.125 53.98 2.375 60.33 2.375 60.33 3.750 95.3
Typical dimensions Terminals: .250 (5)
101.6
Mounting holes: .188 Dia. (2)
4.78
30VB6
10VB6 & 20VB6
Pricing
Consult your local Corcom sales representative for pricing. Part No. 1VB1 1VB3 2VB1 2VB3 3VB1 3VB3 5VB1 5VB3 10VB1 10VB3 10VB6 20VB1 20VB6 30VB6 Part No. 1EB1 1EB3 2EB1 2EB3 3EB1 3EB3 5EB1 5EB3 10EB1 10EB3 20EB1
B (max) 1.82 46.2 1.82 46.2 1.82 46.2 1.82 46.2 1.82 46.2 1.82 46.2 1.82 46.2 2.07 52.6 2.07 52.6 3.38 85.9
C (max) 0.66 16.8 0.66 16.8 0.78 19.8 0.78 19.8 1.16 29.5 1.16 29.5 1.16 29.5 1.16 29.5 1.16 29.5 1.53 38.9
元器件交易网
Series
Case Styles
Metric shown in italics.
B
E (max) 2.53 64.3 2.53 64.3 2.53 64.3 2.53 64.3 2.53 64.3 2.53 64.3 2.53 64.3 2.81 71.4 2.81 71.4 4.2 106.7
15 30 38 50 50 50 7 20 25 40 45 48 15 29 35 45 45 48 7 19 23 34 37 42
B 14
EB Models 1A, 3A 2A, 5A, 10A, 20A
*EB models only.
Libertyville, IL (847) 680-7400
Resistor location for reference only.
Minimum insertion loss in dB: Line-to-ground in 50 ohm circuit Current Rating VB Models 1A, 3A 2A, 5A, 10A, 20A, 30A Frequency–MHz .15 .5 1 5 10 30
元器件交易网
B Series
General Purpose RFI Power Line Filters General Purpose for High Impedance Loads at Low Cost
VB1/EB1
UL Recognized CSA Certified VDE Approved SEV Approved* B Series