1 Features

? Fully configurable dual-rail design allows each port

to operate from 1.1V to 5.5V

? Up to 200Mbps support for 3.3V to 5.0V

? Schmitt-trigger inputs allows for slow and noisy

inputs

? Inputs with integrated static pull-down resistors

prevent channels from floating

? High drive strength (up to 12mA at 5V)

? Low power consumption

– 2.5μA maximum (25°C)

– 6μA maximum (–40°C to 125°C)

? VCC isolation and VCC disconnect (Ioff-float) feature

– If either VCC input is <100 mV or disconnected,

all outputs are disabled and become highimpedance

? Ioff supports partial-power-down mode operation

? Control logic (OE) with VCC(MIN) circuitry allows for

control from either A or B port

? TXU0104 supports active high OE, TXUN0104

supports active low OE

? Pinout compatible with TXB family level shifters

? Available in other variants that support common

applications: TXU0204, TXU0304

? Operating temperature from –40°C to +125°C

? Latch-up performance exceeds 100mA per JESD

78, class II

? ESD protection exceeds JESD 22

– 2500V human-body model

– 1500V charged-device model

2 Applications

? Eliminate slow or noisy input signals

? Driving indicator LEDs or buzzers

? Debouncing a mechanical switch

? General purpose I/O level shifting

? Push-pull level shifting (UART, SPI, JTAG, and so

forth)

3 Description

TXU0104 / TXUN0104 is a 4-bit, dual-supply

noninverting fixed direction voltage level translation

device. Ax pins are referenced to VCCA logic level,

OE pin can be referenced to either VCCA or VCCB

logic levels, and Bx pins are referenced to VCCB logic

levels. The A port is able to accept input voltages

ranging from 1.1V to 5.5V, while the B port can

also accept input voltages from 1.1V to 5.5V. Fixed

direction data transmission can occur from A to B

or B to A when OE is set to high in reference to

either supply. When OE is set to low, all output pins

are in the high-impedance state. The only difference

between TXU0104 and TXUN0104 is the OE / OE

signal being active high and active low respectively.

See Section 7.4 for a summary of the operation of the

control logic.