SN74HC157PWT

Overview

The SN74HC157PWT is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature from -40°C to 85°C. The device features four independent multiplexers controlled by a common address select input and an active-low strobe input. It provides TTL-compatible CMOS inputs, low power consumption with a maximum ICC of 80µA, and outputs capable of driving up to 15 LSTTL loads. The typical propagation delay is 11ns at 5V.

Feature Summary

• Contains four independent 2-to-1 multiplexers sharing a common address select input
• Features TTL-compatible CMOS inputs for direct interface with logic devices
• Includes an active-low strobe input that forces all outputs low when asserted
• Provides standard CMOS output drive capabilities suitable for multiple loads

Applications

• Multiplexing and routing 4-bit data buses between source devices
• Data selection in system controllers
• General-purpose digital signal switching

Procurement Notes

Verify the obsolete status of this specific part number before procurement planning. Confirm if the tape-and-reel suffix 'T' is available or if the standard tube version 'SN74HC157PW' is required. Ensure design reviews account for end-of-life transitions and validate alternative package options against current inventory availability.

Selection Notes

Select this component for applications requiring quadruple 2-to-1 data selection with shared control lines. Verify compatibility with the target supply voltage range and ensure the load capacitance does not exceed recommended limits to maintain specified switching characteristics. Consider the operating temperature range requirements for the specific environment.

Part Context

This device belongs to the SNx4HC157 family of high-speed silicon gate CMOS multiplexers. It is designed for asynchronous operation where outputs reflect the selected input based on the address line. The PW package denotes a TSSOP form factor, providing a compact solution for surface-mount assembly compared to through-hole alternatives.

Replacement Considerations

The SN74HC157PWR is listed as an active production alternative in the same TSSOP package. Other variants include SN74HC157DR (SOIC) and SN74HC157DBR (SSOP). Verify pinout compatibility and electrical specifications when substituting.