SN74LVC157APWG4

Overview

The SN74LVC157APWG4 is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. It operates from a supply voltage of 1.65V to 3.6V and features inputs that accept voltages up to 5.5V, enabling translation in mixed 3.3V/5V systems. The device provides true (non-inverted) outputs controlled by a common strobe input. It is housed in a 16-pin TSSOP package with a maximum propagation delay of 5.2ns at 3.3V.

Feature Summary

• Operates within a wide supply voltage range of 1.65V to 3.6V
• Features 5.5V tolerant inputs for interfacing with higher voltage logic
• Provides low output ground bounce performance
• Includes high electrostatic discharge protection capabilities

Applications

• Translating data between mixed 3.3V and 5V system environments
• Routing data from two sources to four common output buses
• Implementing function generators using two-variable logic functions

Procurement Notes

Verify the specific ordering suffix 'G4' corresponds to lead-free and RoHS-compliant specifications as defined in the manufacturer's documentation. Confirm the package type matches the required PCB footprint and thermal management needs. Ensure the operating temperature range aligns with the intended application environment before finalizing procurement decisions.

Selection Notes

Select this component when a quadruple multiplexer with 5.5V tolerant inputs is required for low-voltage digital applications. Consider the TSSOP package dimensions and thermal resistance values if space or heat dissipation are critical constraints. Verify compatibility with the system's supply voltage levels and signal integrity requirements regarding propagation delay and ground bounce.

Part Context

This part belongs to the SNx4LVC157A family of quadruple 2-line to 1-line data selectors/multiplexers. The family includes variants such as SN74LVC157AD and SN74LVC157APWR, which share identical logical functionality but differ in packaging options like SOIC or tape-and-reel configurations. The 'G4' suffix indicates environmental compliance attributes.

Replacement Considerations

SN74LVC157AD

FAQ

How does the device handle unused inputs?

All unused inputs must be connected to either VCC or GND to prevent undefined operational states caused by floating voltages.

What is the function of the G pin?

The G pin is an active-low output strobe. When G is high, all outputs are forced low; when G is low, the selected data is routed to the outputs.