RS4T774XTSS16

This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 0.9 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 0.9 to 3.6 V. This allows for universal low-voltage bi-directional translation between any of the 0.9V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes. The RS4T774 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE(overline)) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ. This device is fully specified for partial-power-down applications using IOFF. The IOFF circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

Applications

• Desktop PC
• Personal electronics
• Industrial
• Enterprise

Key features

• Each Channel Has an Independent DIR Control Input
• Control Inputs VH/VL Levels are Referenced to VCCA Voltage
• Power-Supply Range: VCCA and VCCB: 0.9V to 3.6V
• VCC Isolation Feature: If Either VCC Input is Below 100 mV, all I/Os Outputs are Disabled and Become High Impedance
• IOFF: Supports Partial-Power-Down Mode Operation
• Extended Temperature: -40°C to ±125°C