74HCT157DR2G

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74HCT157DR2G is a high-performance silicon-gate CMOS quad 2-input data selector/multiplexer. It routes two nibbles (A or B) to a single port (Y) based on the Select input, presenting data in noninverted form. The device operates within a DC supply voltage range of 4.5 V to 5.5 V and supports an operating temperature from -55°C to +125°C. It features low input current of 1.0 µA and output drive capability for 10 LSTTL loads. Propagation delays are specified at 21 ns (A/B to Y), 22 ns (Select to Y), and 20 ns (Output Enable to Y) at 4.5 V with a 50 pF load.

Signal Switches, Multiplexers, Decoders Feature Summary

• Outputs directly interface to CMOS, NMOS, and TTL logic families
• Inputs compatible with standard CMOS outputs and LSTTL outputs when pullup resistors are used
• High noise immunity characteristic of CMOS devices
• ESD protection rated at 2000 V per Human Body Model and 200 V per Machine Model

Signal Switches, Multiplexers, Decoders Applications

• Data routing between multiple sources to a single destination
• System configuration and address decoding
• Signal selection in digital control circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the ordering suffix DR2G corresponds specifically to the SOIC-16 package and tape-and-reel shipping format. Confirm the component meets Pb-Free requirements as indicated by the G suffix. Ensure the selected variant matches the required pinout and electrical specifications for the target application environment.

Signal Switches, Multiplexers, Decoders Selection Notes

This part is functionally identical in pinout to the LS157 but utilizes HCT logic levels. Select this component when TTL-compatible inputs are required alongside CMOS performance characteristics. Verify that the 4.5 V to 5.5 V supply voltage range aligns with the system power rails and that the -55°C to +125°C temperature range covers the operational environment.

Signal Switches, Multiplexers, Decoders Part Context

The 74HCT157 series belongs to the High-Speed CMOS Logic family designed for compatibility with TTL standards. Manufactured by onsemi, these devices offer improved speed and lower power consumption compared to older logic families while maintaining pin compatibility with legacy designs. The DR2G suffix denotes the specific surface-mount packaging and manufacturing lot details.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include other manufacturers' 74HCT157 variants in SOIC-16 packages. Cross-reference pinouts and electrical characteristics to ensure compatibility with existing circuit designs.