74AHCT157BQ,115

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHCT157BQ,115 is a quad 2-input multiplexer from the AHCT logic family, housed in a DHVQFN16 package (SOT763-1). It selects 4 bits of data from two sources under the control of a common data select input (S), with an active LOW enable input (E). The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range of -40 °C to +125 °C. Propagation delays vary based on load capacitance and voltage, ranging from 8 ns to 16.5 ns for data inputs and up to 13.5 ns for the select line at 50 pF load.

Signal Switches, Multiplexers, Decoders Feature Summary

• Operates with TTL input levels while maintaining CMOS performance characteristics
• All inputs feature Schmitt-trigger action for improved noise immunity
• Inputs are overvoltage tolerant, accepting voltages higher than VCC
• Provides balanced propagation delays across all channels

Signal Switches, Multiplexers, Decoders Applications

• Moving data between two groups of registers to four common output buses
• Memory chip select decoding
• Function generation for irregular logic implementations
• Implementation of 4-pole, 2-position switching functions

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when TTL-compatible inputs are required alongside high-speed CMOS performance. The AHCT series ensures direct interface with TTL logic levels while offering faster switching speeds compared to standard LS TTL. Ensure the design accommodates the 4.5 V to 5.5 V supply requirement and utilizes the DHVQFN16 package constraints for thermal management and PCB layout.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AHC/AHCT157 family of quad 2-input multiplexers. It is pin-compatible with Low Power Schottky TTL (LSTTL) devices. The BQ suffix denotes the DHVQFN16 plastic dual in-line compatible thermal enhanced very thin quad flat package, which is leadless and measures 2.5 x 3.5 x 0.85 mm.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct pin-compatible replacements include other variants of the 74AHCT157 family such as the SO16 (74AHCT157D) or TSSOP16 (74AHCT157PW) packages. Cross-family replacements like 74LVC157A may require voltage level translation considerations due to different supply ranges.