1.

General description

The 74AVCH1T45 is a single bit, dual supply transceiver that enables bidirectional level

translation. It features two 1-bit input-output ports (A and B), a direction control input (DIR)

voltage between 0.8 V and 3.6 V making the device suitable for translating between any of

the low voltage nodes (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V and 3.3 V). Pins A and DIR are

transmission from A to B and a LOW on DIR allows transmission from B to A.

circuitry disables the output, preventing any damaging backflow current through the

GND level, both A and B are in the high-impedance OFF-state.

The 74AVCH1T45 has active bus hold circuitry which is provided to hold unused or

floating data inputs at a valid logic level. This feature eliminates the need for external

pull-up or pull-down resistors.

2.

Features and benefits

74AVCH1T45

Dual-supply voltage level translator/transceiver; 3-state

Rev. 4 — 3 August 2012

Product data sheet