CD74HC253M

Overview

The CD74HC253M is a high-speed CMOS logic device manufactured by Harris Corporation, classified as a dual 4-input multiplexer with 3-state outputs. It belongs to the HC/UH series and utilizes a PDSO16 (Small Outline) package. The component operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -40°C to +85°C. Key electrical characteristics include a propagation delay of 350 ns and a load capacitance specification of 50 pF. The device features common select inputs and separate output enable inputs, allowing for direct interface with system buses.

Feature Summary

• Dual independent 4-to-1 data selection capability
• Three-state outputs for bus interfacing
• Common address select lines for both multiplexers
• Separate output enable controls

Applications

• Data selector circuits
• Data multiplexing systems
• Bus-oriented switching applications

Procurement Notes

Verify the manufacturer origin carefully, as Harris Corporation's logic assets were acquired by Texas Instruments. Ensure the specific suffix 'M' corresponds to the SOIC package variant required for your PCB layout. Confirm RoHS compliance status, as older Harris-branded components may not meet current environmental regulations compared to modern TI equivalents.

Selection Notes

Select this component when a dual 4-channel multiplexer with 3-state buffering is required in a surface-mount form factor. The HC series offers CMOS compatibility with standard TTL input levels at higher voltages. Consider the 350 ns propagation delay against system timing requirements. Verify that the 2V to 6V operating range aligns with the target power supply rails.

Part Context

This part is part of the 74HC253 family of dual 4-input multiplexers. While originally produced by Harris Corporation, these devices are functionally equivalent to those produced by other major semiconductor manufacturers following industry standardization. The CD74HC253M specifically denotes the plastic small-outline package version.

Replacement Considerations

Texas Instruments CD74HC253M is the primary verified successor due to the acquisition of Harris logic assets. Other pin-compatible alternatives include NXP 74HC253D or onsemi MC74HC253ADR2G, provided voltage and speed specifications match the design requirements.