TXB0302 Translator Datasheet

TXB0302 Datasheet, PDF, Equivalent


Part Number

TXB0302

Description

2-Bit Bidirectional Voltage-Level Translator

Manufacture

etcTI

Total Page 19 Pages
Datasheet
Download TXB0302 Datasheet


TXB0302
www.ti.com
TXB0302
SCES837B – MARCH 2012 – REVISED OCTOBER 2012
2-Bit Bidirectional Voltage-Level Translator with Automatic Direction Sensing
Check for Samples: TXB0302
FEATURES
1
• Fully Symmetric Supply Voltages.
0.9 V to 3.6 V on A Port and 0.9 V to 3.6 V
• VCC Isolation Feature — If Either VCC Input Is at
GND, All Outputs Are in the High-Impedance
State
• OE Input Circuit Referenced to VCCA
• Low Power Consumption, 5-µA Max ICC
• Ioff Supports Partial-Power-Down Mode
Operation
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 4000-V Human-Body Model (A114-B)
– 1000-V Charged-Device Model (C101)
DESCRIPTION
This 2-bit noninverting translator uses two separate
configurable power-supply rails. The A port is
designed to track VCCA. VCCA accepts any supply
voltage from 0.9 V to 3.6 V. The B port is designed to
track VCCB. VCCB accepts any supply voltage from
0.9 V to 3.6 V. This allows for low-voltage
bidirectional translation between 1-V, 1.2-V, 1.5-V,
1.8-V, 2.5-V and 3.3-V voltage nodes. For the
TXB0302, when the output-enable (OE) input is low,
all outputs are placed in the high-impedance state. 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. The TXB0302 is designed so that the OE input
circuit is supplied by VCCA. 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.
DQM PACKAGE
(TOP VIEW)
VCCA 1
A1 2
A2 3
GND 4
8 VCCB
7 B1
6 B2
5 OE
A. Pull up resistors are not required on both sides for Logic I/O.
B. If pull up or pull down resistors are needed, the resistor value must be over 20 kΩ.
C. 20 kΩ is a safe recommended value, if the customer can accept higher Vol or lower Voh, smaller pull up or pull down
resistor is allowed, the draft estimation is Vol = Vccout × 1.5k/(1.5k + Rpu) and Voh = Vccout × Rdw/(1.5k + Rdw).
D. If pull up resistors are needed, please refer to the TXS0102 or contact TI.
E. For detailed information, please refer to application note SCEA043.
TA
–40°C to 85°C
ORDERING INFORMATION(1)
PACKAGE (2)
ORDERABLE PART NUMBER
DQM – MicroQFN
TXB0302DQMR
TOP-SIDE MARKING
77A
(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.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated

TXB0302
TXB0302
SCES837B – MARCH 2012 – REVISED OCTOBER 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
PIN NO.
DQM
1
2
3
4
5
6
7
8
NAME
TXB0302
VCCA
A1
A2
GND
OE
B2
B1
VCCB
PIN DESCRIPTION
FUNCTION
A-port supply voltage 0.9 V VCCA 3.6 V
Input/output 1. Referenced to VCCA.
Input/output 2. Referenced to VCCA.
Ground
3-state output-mode enable. Pull OE (TXB0302) low to place all outputs in 3-state mode.
Input/output 2. Referenced to VCCB.
Input/output 1. Referenced to VCCB.
B-port supply voltage 0.9 V VCCB 3.6 V.
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
VCCA
VCCB
VI
Supply voltage range
Input voltage range
A port
B port
–0.5 4.6 V
–0.5 4.6
–0.5 4.6 V
–0.5 6.5
VO
Voltage range applied to any output in the high-impedance or A port
power-off state
B port
–0.5 4.6 V
-0.5 6.5
A port
VO
Voltage range applied to any output in the high or low state(2)
B port
–0.5 VCCA + 0.5
–0.5 VCCB + 0.5
V
IIK Input clamp current
IOK Output clamp current
IO Continuous output current
Continuous current through VCCA, VCCB, or GND
VI < 0
VO < 0
–50
–50
±50
±100
mA
mA
mA
mA
Tstg Storage temperature range
–65 150 °C
(1) 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 absolute-maximum-rated conditions for extended periods may affect device reliability.
THERMAL IMPEDANCE RATINGS(1)(2)
THERMAL METRIC
θJA Package thermal impedance
(1) The package thermal impedance is calculated in accordance with JESD 51-7.
(2) The package thermal impedance is calculated in accordance with JESD 51-5.
TXB0302
DQM
8 PINS
259
UNIT
°C/W
2 Submit Documentation Feedback
Product Folder Links :TXB0302
Copyright © 2012, Texas Instruments Incorporated


Features www.ti.com TXB0302 SCES837B – MARCH 2 012 – REVISED OCTOBER 2012 2-Bit Bid irectional Voltage-Level Translator wit h Automatic Direction Sensing Check for Samples: TXB0302 FEATURES 1 • Fully Symmetric Supply Voltages. 0.9 V to 3. 6 V on A Port and 0.9 V to 3.6 V • VC C Isolation Feature — If Either VCC I nput Is at GND, All Outputs Are in the High-Impedance State • OE Input Circu it Referenced to VCCA • Low Power Con sumption, 5-µA Max ICC • Ioff Suppor ts Partial-Power-Down Mode Operation Latch-Up Performance Exceeds 100 mA P er JESD 78, Class II • ESD Protection Exceeds JESD 22 – 4000-V Human-Body Model (A114-B) – 1000-V Charged-Devic e Model (C101) DESCRIPTION This 2-bit noninverting translator uses two separa te configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 0.9 V to 3.6 V. The B port is designed to tra ck VCCB. VCCB accepts any supply voltag e from 0.9 V to 3.6 V. This allows for low-voltage bidirectional translation between 1-V.
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