SN74HC257PWT

Overview

The SN74HC257PWT is a high-speed CMOS logic device featuring four independent 2-line to 1-line data selectors or multiplexers with non-inverting three-state outputs. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to +85°C. The device utilizes a 16-pin TSSOP package with dimensions of 5.00 mm by 4.40 mm. Typical propagation delay is 9 ns at 5 V, with maximum delays reaching 25 ns at 6 V. Output drive capability reaches ±6 mA at 5 V, allowing it to drive up to 15 LSTTL loads.

Feature Summary

• Provides bus interface capabilities from multiple sources in high-performance systems
• Features active-low strobe input that forces all outputs into a high-impedance state when asserted
• Designed for multiplexing signals from 4-bit data sources to 4-output data lines

Applications

• Bus interface routing in high-performance systems
• Multiplexing signals from multiple data sources
• Data selection in digital logic circuits

Procurement Notes

Verify the specific ordering suffix 'PW' corresponds to the TSSOP-16 package configuration required for your design. Confirm RoHS compliance status and moisture sensitivity level ratings prior to procurement. Ensure the selected variant matches the intended production volume and packaging requirements specified in the manufacturer's orderable addendum.

Selection Notes

Select this component when a quad 2-to-1 multiplexer with three-state outputs is required for bus-oriented architectures. The HC series offers a wide voltage range suitable for various logic families. Consider the SN74HC258 if inverted outputs are needed instead of the non-inverting outputs provided by the '257.

Part Context

This part belongs to the SNx4HC257/258 family of quadruple 2-line to 1-line data selectors/multiplexers. It is manufactured by Texas Instruments as part of their standard catalog logic line. The device is designed for general-purpose digital applications requiring signal routing and selection functionality within CMOS logic systems.

Replacement Considerations

SN74HC258PWR: Identical pinout and package but provides inverted outputs instead of non-inverting outputs.