74AC257SCX

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74AC257SCX is a quad 2-input multiplexer belonging to the 74AC logic family. It features four independent multiplexers, each with two data inputs and a common output enable. The device operates within a supply voltage range of 2 V to 6 V. Propagation delay is specified at 8.5 ns at 3.3 V and 6 ns at 5 V. It is housed in a 16-lead SOIC package and supports surface mount installation. The component functions across an operating temperature range from -40 °C to +85 °C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides four independent 2-to-1 multiplexing channels for signal routing
• Features buffered address inputs for improved switching performance
• Includes a common output enable control for bus-oriented applications

Signal Switches, Multiplexers, Decoders Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based designs
• Address decoding circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific manufacturer origin as the 74AC257SCX designation may be associated with multiple vendors including onsemi. Confirm RoHS compliance status and lead-free specifications directly with the supplier or original datasheet before procurement. Ensure the package type matches the required PCB footprint.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad 2-input multiplexer is required with AC series speed characteristics. Verify that the 2 V to 6 V supply voltage range aligns with the system power rails. Consider the 16-lead SOIC package dimensions for layout compatibility. Check if the propagation delay meets the timing requirements of the target application.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC logic family, known for high-speed CMOS operation. It serves as a functional equivalent to other quad multiplexers in the industry standard logic lineup. The SCX suffix typically denotes a specific tape and reel packaging configuration for automated assembly processes.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for direct pin-compatible substitutes such as the 74ACT257 variants if TTL-compatible inputs are needed. Verify electrical parameters against alternatives like the 74HC257 for different speed or voltage requirements.