TXS0302 Datasheet, PDF (1/7 Pages) Texas Instruments – 2-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTOMATIC DIRECTION SENSING

TXS0302
www.ti.com
SCES835 – NOVEMBER 2011
2-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTOMATIC DIRECTION
SENSING
Check for Samples: TXS0302
FEATURES
1
• Fully Symmetric Supply Voltages. 0.9-V to
3.6-V on A Port and B Port
• Max Open Drain Data Rate: 8Mbps
• Internal Pull-up Resistors: 4.7-kΩ
• V_CC Isolation Feature – If Either V_CC Input Is at
GND, All Outputs Are in the High-Impedance
State
• OE Input Circuit Referenced to V_CCA
• Low Power Consumption, 4-µA Max I_CCA + I_CCB
• I_off Supports Partial-Power-Down Mode
Operation
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114)
– 500-V Machine Model (C101)
DQE OR DQM PACKAGE
(TOP VIEW)
V_CCA 1
A1 2
A2 3
GND 4
8 V_CCB
7 B1
6 B2
5 OE
DESCRIPTION/ORDERING INFORMATION
This 2-bit non-inverting translator uses two separate configurable power-supply rails. The A port is designed to
track V_CCA. V_CCA accepts any supply voltage from 0.9 V to 3.6 V. The B port is designed to track V_CCB. V_CCB
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 TXS0302, 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 pull-down resistor; the minimum value of the resistor is
determined by the current-sourcing capability of the driver. The TXS0302 is designed so that the OE input circuit
is supplied by V_CCA. This device is fully specified for partial-power-down applications using I_off. The I_off circuitry
disables the outputs, preventing damaging current backflow through the device when it is powered down. For
typical application circuitry, refer to Figure 1.
Functional Table
Inputs
OE
V_CCA/V_CCB
An/Bn
H
H
L
H
H
H
H
L
X
L
X
X
Output
Bn/An
L
H
3-State
3-State
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2011, Texas Instruments Incorporated