SN74LVC157APWR

Overview

The SN74LVC157APWR 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 four independent multiplexers with a common strobe input (G) and address select input (A/B). When G is high, all outputs are low; when G is low, the A/B input selects between two sources for the 4-bit word routed to the outputs. It is housed in a 16-pin TSSOP package.

Feature Summary

• Operates within a wide supply voltage range of 1.65V to 3.6V
• Provides 5.5V tolerant inputs for interfacing with 5V logic devices
• Includes a common active-low output strobe (G) input

Applications

• Translating signals in mixed 3.3V and 5V system environments
• Routing 4-bit words from one of two sources to common output buses
• Implementing highly irregular logic functions using two variables

Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-16 package and tape-and-reel carrier format. Confirm the operating temperature range matches the application requirements, as the SN74LVC157A series supports -40°C to 85°C and -40°C to 125°C variants. Ensure the datasheet revision aligns with current design specifications.

Selection Notes

Select this component for applications requiring quadruple 2-to-1 multiplexing with low-voltage operation down to 1.65V. The 5.5V tolerant inputs make it suitable for bridging different logic voltage domains without additional level shifters. Consider the TSSOP package dimensions and thermal characteristics if space or heat dissipation is a constraint.

Part Context

This part belongs to the SNx4LVC157A family of quadruple 2-line to 1-line data selectors/multiplexers. The family includes various package options such as SOIC, SSOP, SOP, WQFN, and VQFN. The 'SN74' prefix indicates commercial grade availability, while 'LVC' denotes the low-voltage CMOS technology optimized for 1.65V to 3.6V operation.

Replacement Considerations

Other parts in the SN74LVC157A family, such as SN74LVC157AD (SOIC) or SN74LVC157ANSR (SOP), offer identical electrical functionality but differ in package type. Verify pinout compatibility and physical footprint before substituting.