TXB0304 Datasheet, PDF (1/14 Pages) Texas Instruments – 4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTOMATIC DIRECTION SENSING

TXB0304
www.ti.com
SCES831C – SEPTEMBER 2011 – REVISED MAY 2012
4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTOMATIC DIRECTION
SENSING
Check for Samples: TXB0304
FEATURES
1
• Fully Symmetric Supply Voltages. 0.9 V to 3.6
V on A Port and 0.9 V to 3.6 V
• 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, 5-μA Max (I_CCA or
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
– 8000-V Human-Body Model (A114-B)
– 1000-V Charged-Device Model (C101)
DESCRIPTION
This 4-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 TXB0304, 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
TXB0304 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.
RSV PACKAGE
(TOP VIEW)
RUT PACKAGE
(TOP VIEW)
TXB0304
TXBN0304
TXB0304
TXBN0304
A1
B1
A1
B1
A2
B2
A2
B2
A3
B3
A3
B3
A4
B4
A4
B4
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 TXS0104 or contact TI.
E. For detailed information, please refer to application note SCEA043.
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 © 2011–2012, Texas Instruments Incorporated