74AC157PC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC157PC is a quad 2-input multiplexer housed in a 16-lead Plastic Dual-In-Line Package (PDIP). It operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature range of -40°C to +85°C. The device features outputs capable of sourcing and sinking 24 mA. Propagation delays from Select to Output are 9.0 ns maximum at 5.0V, while delays from Input to Output reach 6.5 ns maximum at 5.0V.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-input multiplexer architecture with common Select and Enable inputs
• Outputs present selected data in true noninverted form
• Reduced ICC and IOZ by 50% compared to standard AC logic
• Capable of functioning as a function generator for gating applications

Signal Switches, Multiplexers, Decoders Applications

• Moving data between two groups of registers to common output busses
• Implementing gating functions via function generation
• Selecting four bits of data from two sources under control logic

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package type matches the required PCB footprint, as the PC suffix denotes a 16-lead PDIP configuration. Confirm that the design environment falls within the specified AC voltage limits of 2.0V to 6.0V. Ensure thermal management accounts for the recommended operating temperature range of -40°C to +85°C during system integration.

Signal Switches, Multiplexers, Decoders Selection Notes

Choose this component when a high-speed quad multiplexer with reduced power consumption is required. The AC series offers faster performance than legacy counterparts while maintaining compatibility with standard logic families. Verify that the 24 mA output drive current meets the load requirements of the destination circuitry without exceeding absolute maximum ratings.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC157 family of quad 2-input multiplexers originally developed by Fairchild Semiconductor. The AC logic family provides higher speed and lower power dissipation compared to earlier 74LS or 74S technologies. The device implements a 4-pole, 2-position switch functionality controlled by a single Select input line.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT157PC serves as a direct functional substitute, offering TTL-compatible input thresholds while retaining the same pinout and package style. Other variants such as the SC (SOIC) or MTC (TSSOP) versions provide identical logical functionality but require different physical mounting considerations.