CD74HC253E

Overview

The CD74HC253E is a high-speed CMOS multiplexer manufactured by Harris Corporation. It features two independent 4-line to 1 data selectors with common select inputs and active-low enable inputs. The device operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -40°C to 85°C. It utilizes a 16-pin Plastic Dual In-Line Package (PDIP) with 16 terminals. Key electrical characteristics include a maximum low-level output current of 0.006 A, a load capacitance of 50 pF, and 3-state output capability.

Feature Summary

• Provides dual independent 4-to-1 multiplexing functionality with shared selection control
• Features active-low enable inputs for precise signal gating and power management
• Delivers 3-state outputs to facilitate bus-oriented communication architectures

Applications

• Data routing in digital logic systems
• Signal selection in measurement equipment
• Address decoding applications

Procurement Notes

Verify the manufacturer designation as Harris Corporation on the component marking. Confirm the PDIP-16 package style matches system requirements. Check RoHS compliance status, as documentation indicates non-compliance. Ensure the operating temperature range meets environmental specifications. Validate pinout compatibility with existing PCB layouts.

Selection Notes

Select this component when dual independent 4-to-1 multiplexing is required in a single package. Consider the 2V to 6V supply range for compatibility with various logic families. Verify that the 3-state output aligns with bus design requirements. Assess the PDIP-16 package for through-hole mounting constraints. Evaluate the -40°C to 85°C temperature range against operational environments.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It functions as a multiplexer, distinct from other logic types like gates or flip-flops. The device integrates two separate multiplexing channels, offering a compact solution for signal routing compared to using discrete components. Its CMOS technology ensures low power consumption relative to older logic families.