SN74F157AN

Overview

The SN74F157AN is a quadruple 2-input data selector/multiplexer from the Texas Instruments 74F logic family. It features four independent multiplexers with a common strobe (G) input. When the strobe is high, all outputs are disabled. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a propagation delay of 14 ns. It is housed in a 16-pin PDIP package and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Contains four independent 2-to-1 line data selectors
• Features a common strobe input for output control
• Compatible with standard TTL logic levels

Applications

• Data routing in digital systems
• Signal selection in microprocessor interfaces
• Address decoding circuits

Procurement Notes

Verify the specific suffix 'AN' confirms the 16-pin PDIP package and commercial temperature grade. Confirm RoHS compliance status as required by project specifications. Ensure the supplier provides valid traceability documentation for the Texas Instruments manufacturer part number. Check for any obsolescence notices or lifecycle changes before finalizing procurement plans.

Selection Notes

Select this component when four independent signal paths require switching with a single control signal. The 74F series offers faster switching speeds compared to standard 74LS devices but consumes more power. Ensure the system voltage aligns with the 5V requirement and that the through-hole packaging fits the PCB layout constraints.

Part Context

This part belongs to the 74F (Fast) logic family, known for high-speed performance relative to earlier generations. It serves as a direct functional replacement for older 74157 variants where speed is prioritized over power consumption. The 'A' suffix typically denotes improved noise immunity or manufacturing revisions within the same form factor.

Replacement Considerations

SN74ALS157N offers lower power consumption with slightly slower speed. SN74HC157N provides CMOS compatibility with wider voltage ranges. Verify pinout compatibility and electrical characteristics before substituting.