Texas Instruments SN74AVC4T774RSVR Bus Transceiver, 4-Bit, 3.1ns, UQFN-16

The Texas Instruments SN74AVC4T774RSVR is a sophisticated 4-bit dual-supply bus transceiver engineered for robust asynchronous communication between data buses with different voltage levels. It features configurable voltage translation and 3-state outputs, making it an essential component for mixed-voltage system designs. Logic levels on the direction-control (DIR) and output-enable (OE) inputs determine data flow, activating either the B-port or A-port outputs, or placing both ports into a high-impedance state for bus isolation.

This device transmits data from the A bus to the B bus when the B outputs are active, and vice versa. The input circuitry on both A and B ports is always active, requiring a defined logic high or low level to be applied to prevent excess supply current. A key design feature is that the control pins (DIR1-4 and OE) are supplied by VCCA, simplifying power management.

Fully specified for partial-power-down applications, it incorporates Ioff circuitry. This safety feature disables the outputs to prevent damaging current backflow through the device when it is powered down, protecting the wider system. Each of the four channels benefits from an independent direction control input for flexible data routing.

Built for reliability, the transceiver's I/O ports are tolerant up to 4.6V, enhancing interface robustness. Its latch-up performance exceeds 100mA per JESD 78, Class II standards, ensuring stability in demanding electrical environments. As a green product, it contains no antimony or bromine (no Sb/Br).

With a fast propagation delay of just 3.1ns and an output current capability of 50mA, this component delivers the speed and drive strength required for modern digital communication links. Its compact UQFN-16 package is ideal for space-constrained applications.