74AHC157D,118

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHC157D,118 is a quad 2-input multiplexer in the AHC logic series. It selects 4 bits of data from two sources under a common select input (S). The enable input (E) is active LOW; when HIGH, outputs are forced LOW. It operates with CMOS input levels at VCC ranging from 2.0 V to 5.5 V. Propagation delay is 13.2 ns at 3.3 V and 8.4 ns at 5 V. It is housed in an SOIC-16 package (SOT109) and functions as a 4-pole, 2-position switch.

Signal Switches, Multiplexers, Decoders Feature Summary

• Balanced propagation delays across all channels
• All inputs feature Schmitt-trigger action for noise immunity
• Inputs accept voltages higher than VCC
• Multiple input enable capability facilitates easy expansion

Signal Switches, Multiplexers, Decoders Applications

• Moving data between two groups of registers to four common output buses
• Memory chip select decoding
• Function generation implementing irregular logic
• Logic implementation of a 4-pole, 2-position switch

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm the package type and temperature range. Ensure the selected variant matches the required voltage levels and interface standards for the target application design.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for high-speed applications requiring balanced delays and CMOS compatibility. Verify that the operating voltage falls within the 2.0 V to 5.5 V range and that the SOIC-16 package fits the PCB layout constraints. Confirm ESD protection requirements meet system specifications.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74AHC/AHCT157 family of quad 2-input multiplexers. It is pin-compatible with Low Power Schottky TTL (LSTTL) devices. The product specification complies with JEDEC standard no. 7A, ensuring interoperability with standard logic families.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74AHCT157D,118 serves as a direct pin-compatible alternative if TTL input levels are required instead of CMOS levels. Other variants within the same datasheet may offer different package options such as TSSOP or DHVQFN.