CD74HCT257M

Signal Switches, Multiplexers, Decoders Overview

The CD74HCT257M is a quad 2-input multiplexer from the HCT series, manufactured by Harris Corporation. It features buffered inputs and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes CMOS technology and is housed in a 16-pin SOIC package. It supports synchronous operation with a typical propagation delay of 12ns at VCC = 5V and CL = 50 pF. The component is designed for high-speed digital signal routing applications.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad configuration providing four independent 2-to-1 data selection channels
• Buffered inputs ensure signal integrity and noise immunity
• Synchronous positive edge-triggered operation for precise timing control
• Compatible with standard TTL logic levels via HCT input structure

Signal Switches, Multiplexers, Decoders Applications

• Digital signal routing in microprocessor systems
• Data selection for analog-to-digital converter inputs
• Address decoding and bus switching circuits
• Logic function generation using data inputs as control signals

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify RoHS compliance status as documentation indicates non-compliance. Confirm package variant matches project requirements (SOIC-16). Check lifecycle status for obsolescence risks. Ensure supply voltage aligns with system 5V rails. Validate operating temperature range against environmental specifications.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when multiple independent 2:1 multiplexing functions are required in a single package. The HCT series ensures compatibility with 5V TTL logic families. Consider the 12ns propagation delay for timing-critical paths. Verify that the 16-pin SOIC footprint fits the PCB layout constraints.

Signal Switches, Multiplexers, Decoders Part Context

Part of the Harris 74HCT logic family, designed for high-speed CMOS applications with TTL-compatible inputs. The CD74HCT257M specifically addresses multi-channel data selection needs in digital systems. Harris Semiconductor was a key provider of logic ICs before industry consolidation.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for direct pin-compatible equivalents from other manufacturers such as SN74HCT257. Verify electrical parameters match, especially propagation delay and supply voltage range. Ensure package dimensions are identical for board replacement.