SN74HC157PWTG4

Overview

The SN74HC157PWTG4 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 a strobe input. Key electrical parameters include a typical propagation delay of 11ns at 5V, maximum low-level output current of 7.8mA, and maximum high-level output current of 7.8mA. It utilizes a 16-pin TSSOP package.

Feature Summary

• Contains four independent 2-to-1 multiplexers with a common address select input for synchronized channel selection.
• Features TTL-compatible CMOS inputs designed to interface directly with TTL logic devices.
• Includes an active-low strobe input that forces all outputs to a low state regardless of other input conditions.

Applications

• Switching a 4-bit data bus between two source devices
• Data routing applications requiring asynchronous multiplexing
• Function signal generation

Procurement Notes

Verify the specific ordering suffix 'TG4' against the manufacturer's official documentation to confirm lead-free status and RoHS compliance details. Confirm the package type matches the required PCB footprint. Check the latest datasheet revision history for any updates to recommended operating conditions or thermal characteristics before finalizing procurement specifications.

Selection Notes

Select this component when a quadruple 2-to-1 multiplexer with standard CMOS inputs is required. Ensure the application voltage falls within the 2V to 6V range. Consider the 11ns typical propagation delay for timing constraints. Verify that the load capacitance does not exceed 50pF to maintain specified performance levels without additional buffering.

Part Context

This part belongs to the SNx4HC157 family of high-speed silicon gate CMOS multiplexers. It is functionally compatible with other HC series logic devices but offers improved speed and lower power consumption compared to older standards. The device is designed for general-purpose digital logic applications requiring reliable data selection and routing capabilities.

Replacement Considerations

SN74HC157PWR is a direct functional replacement in the same TSSOP-16 package. SN74HC157N serves as a through-hole alternative in PDIP-16. SN74HC157DR provides a SOIC-16 option. Verify pinout compatibility and operating temperature ranges when substituting.