4-BIT DUAL SUPPLY LEVEL TRANSLATING BUFFER; 3-STATE

DESCRIPTION

The U74LVC4T3144 is a 4-bit, dual-supply level translating

buffer with 3-state outputs. It features four data inputs (An and B4),

four data outputs (YBn and YA4), and an output enable input (OE(___) ).

The device is configured to translate three inputs from VCCA to VCCB

and one input from VCCB to VCCA. OE(___), An and YA4 are referenced

to VCCA and YBn and B4 are referenced to VCCB. A HIGH on OE(___)

causes the outputs to assume a high-impedance OFF-state.

The device is fully specified for partial power-down applications

using IOFF. The IOFF circuitry disables outputs, preventing any

damaging backflow current through the device when it is powered

down. In suspend mode when either VCCA or VCCB are at GND

level, all outputs are in the high-impedance OFF-state.

FEATURES

* Wide supply voltage range:

VCCA: 1.2V to 5.5V and VCCB: 1.2V to 5.5V

* Inputs accept voltages up to 5.5V

* Low power consumption: 30μA maximum ICC

* ±24mA Output Drive at 3V

* IOFF Supports Partial-Power-Down Mode Operation