电平转换芯片

over operating free-air temperature range (unless otherwise noted)
VCCA VCCB VI VO VO IIK IOK IO
qJA
Tstg
Supply voltage range
Supply voltage range Input voltage range(2) Voltage range applied to any output in the high-impedance or power-off state(2)
2
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Product Folder Link(s): TXB0108
Copyright © 2006–2010, Texas Instruments Incorporated
www.ti.com
TXB0108
SCES643B – NOVEMBER 2006 – REVISED FEBRUARY 2010
To ensure the high-impedance state during power up or power down, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.
– 1000-V Charged-Device Model (C101)
DQS PACKAGE (TOP VIEW)
A1 1 A2 2 A3 3 A4 4 V5
CCA
OE 6 A5 7 A6 8 A7 9 A8 10
20 B1 19 B2 18 B3 17 B4 16 V
CCB
15 GND 14 B5 13 B6 12 B7 11 B8
TXB0108
www.ti.com
SCES643B – NOVEMBER 2006 – REVISED FEBRUARY 2010
8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION
Reel of 2000
TXB0108PWR
VFBGA – GXY
Reel of 2500
TXB0108GXYR
VFBGA – ZXY (Pb-free) Reel of 2500
TXB0108ZXYR
TOP-SIDE MARKING YE08 5MR YE08 YE08 YE08
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com.
When the output-enable (OE) input is low, all outputs are placed in the high-impedance state.
The TXB0101 is designed so that the OE input circuit is supplied by VCCA.
Copyright © 2006–2010, Texas Instruments Incorporated
TXB0108
SCES643B – NOVEMBER 2006 – REVISED FEBRUARY 2010
www.ti.com
DESCRIPTION/ORDERING INFORMATION
Input/output 8. Referenced to VCCB. Input/output 7. Referenced to VCCB. Input/output 6. Referenced to VCCB. Input/output 5. Referenced to VCCB. Input/output 4. Referenced to VCCB. Input/output 3. Referenced to VCCB. Input/output 2. Referenced to VCCB. B-port supply voltage. 1.65 V ≤ VCCB ≤ 5.5 V. Input/output 1. Referenced to VCCB.
• ESD Protection Exceeds JESD 22
– A Port
D
– 2000-V Human-Body Model (A114-B)
C
– 1000-V Charged-Device Model (C101)
B
– B Port
A
– ±15-kV Human-Body Model (A114-B)
TYPICAL OPERATING CIRCUIT
1.8 V
3.3 V
1.8 -V System Controller
Data
VCCA OE
VCCB
TXB0108
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
A8
B8
3.3-V System
Data
Absolute Maximum Ratings(1)
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
D C B A
TERMINAL ASSIGNMENTS (20-Ball GXY/ZXY Package)
1
2
3
4
VCCB
B2
B4
B6
B1
B3
B5
B7
A1
A3
A5
A7
VCCA
A2
A4
A6
5 B8 GND OE A8
RGY PACKAGE (TOP VIEW)
B1
A1
1 V2
CCA
A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9
This 8-bit noninverting translator uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes. VCCA should not exceed VCCB.
10
20 19 V
CCB
18 B2 17 B3 16 B4 15 B5 14 B6 13 B7 12 B8
11
GND
OE
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NAME
PIN DESCRIPTION
FUNCTION
A1 VCCA
A2 A3 A4 A5 A6 A7 A8
OE
GND B8 B7 B6 B5 B4 B3 B2 VCCB B1
Input/output 1. Referenced to VCCA. A-port supply voltage. 1.1 V ≤ VCCA ≤ 3.6 V, VCCA ≤ VCCB. Input/output 2. Referenced to VCCA. Input/output 3. Referenced to VCCA. Input/output 4. Referenced to VCCA. Input/output 5. Referenced to VCCA. Input/output 6. Referenced to VCCA. Input/output 7. Referenced to VCCA. Input/output 8. Referenced to VCCA. Output enable. Pull OE low to place all outputs in 3-state mode. Referenced to VCCA. Ground
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warrantywk.baidu.com Production processing does not necessarily include testing of all parameters.
Check for Samples: TXB0108
FEATURES
1
• 1.2 V to 3.6 V on A Port and 1.65 to 5.5 V on B Port (VCCA ≤ VCCB)
• VCC Isolation Feature – If Either VCC Input Is at GND, All Outputs Are in the High-Impedance State
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
NO. (DQS, PW,
RGY) 1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16 17 18 19 20
Voltage range applied to any output in the high or low state(2) (3)
• OE Input Circuit Referenced to VCCA
• Low Power Consumption, 4-mA Max ICC
• Ioff Supports Partial-Power-Down Mode Operation
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
TA –40°C to 85°C
Table 1. ORDERING INFORMATION(1)
PACKAGE (2)
ORDERABLE PART NUMBER
QFN – RGY
Reel of 1000
TXB0108RGYR
SON – DQS
Reel of 2000
TXB0108DQSR
TSSOP – PW
PW PACKAGE (TOP VIEW)
A1 1 V2
CCA
A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 OE 10
20 B1 19 V
CCB
18 B2 17 B3 16 B4 15 B5 14 B6 13 B7 12 B8 11 GND
GXY OR ZXY PACKAGE (BOTTOM VIEW) 1 2 3 45