74AHC157D,112

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHC157D,112 is a high-speed Si-gate CMOS quad 2-input multiplexer housed in an SO16 (SOT109-1) package. It selects four bits of data from two sources under the control of a common data select input (S). The enable input (E) is active LOW; when HIGH, all outputs are forced LOW. Operating with CMOS input levels, it supports a supply voltage range of 2.0 V to 5.5 V. Propagation delays reach 8.4 ns at 5 V and 13.2 ns at 3.3 V with a 50 pF load. It operates from -40 °C to +125 °C.

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 groups of registers to common output buses
• Memory chip select decoding
• Function generator implementation
• Logic implementation of a 4-pole, 2-position switch

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the ordering suffix matches the required package type, as the 74AHC157 series is available in multiple configurations including TSSOP and DHVQFN. Confirm that the specific part number corresponds to the AHC logic family rather than AHCT, which requires TTL input levels. Ensure the selected component meets the necessary temperature range specifications for the intended operating environment before finalizing procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this device when high-speed switching and balanced propagation delays are required within a standard SO16 footprint. It is suitable for applications needing CMOS-compatible inputs and operation across a wide supply voltage range. Consider alternative packages like TSSOP or DHVQFN if board space constraints require smaller form factors. Verify that the application does not require automotive qualification, as this specific part lacks AEC-Q100 certification.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the 74AHC/AHCT157 family of quad 2-input multiplexers manufactured by Nexperia. These devices are pin-compatible with Low Power Schottky TTL (LSTTL) standards. The AHC variant specifically utilizes CMOS input levels, distinguishing it from the AHCT version which is designed for TTL compatibility. The family is specified in compliance with JEDEC standard no. 7A.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct replacements include other 74AHC157 variants from Nexperia such as the 74AHC157PW (TSSOP16) or 74AHC157BQ (DHVQFN16), provided the package change is acceptable. Cross-brand equivalents must match the quad 2-input multiplexer function, SO16 package, and AHC logic speed characteristics.