RSV PACKAGE

(TOP VIEW)

TXB0304

TXBN0304

A1

A2

A3

A4

B1

B2

B3

B4

A1

A2

A3

A4

B1

B2

B3

B4

A1

A2

A3

A4

B1

B2

B3

B4

A1

A2

A3

A4

B1

B2

B3

B4

RUT PACKAGE

(TOP VIEW)

TXB0304

TXBN0304

TXB0304

www.ti.com

SCES831C – SEPTEMBER 2011 – REVISED MAY 2012

4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTOMATIC DIRECTION

SENSING

Check for Samples: TXB0304

1

FEATURES

DESCRIPTION

•

Fully Symmetric Supply Voltages. 0.9 V to 3.6

This 4-bit non-inverting translator uses two separate

V on A Port and 0.9 V to 3.6 V

configurable

power-supply

rails.

The

A

port

is

•

GND, All Outputs Are in the High-Impedance

voltage from 0.9 V to 3.6 V. The B port is designed to

State

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

•

Low Power Consumption, 5-

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-

Operation

impedance state during power up or power down, OE

should be tied to GND through a pulldown resistor;

•

Latch-Up Performance Exceeds 100 mA Per

the minimum value of the resistor is determined by

JESD 78, Class II

the current-sourcing capability of the driver. The

•

ESD Protection Exceeds JESD 22

TXB0304 is designed so that the OE input circuit is

–

8000-V Human-Body Model (A114-B)

–

1000-V Charged-Device Model (C101)

circuitry disables the outputs, preventing damaging

current backflow through the device when it is

powered down.

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 k

Ω.

C.

20 k

Ω 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.

Copyright © 2011–2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.