SN74HC253N

Overview

The SN74HC253N is a dual 4-input multiplexer manufactured by Texas Instruments, belonging to the HC logic family. It features through-hole PDIP-14 packaging and operates within a supply voltage range of 2V to 6V. The device supports an operating temperature range from -40°C to +85°C. Key electrical characteristics include a maximum propagation delay of 20ns at CL=50pF and output current capabilities of ±5.2mA. It contains two independent 4-to-1 data selectors with common select inputs.

Feature Summary

• Dual independent 4-to-1 multiplexing functionality
• High-speed CMOS technology for low power consumption
• Compatible with standard CMOS logic outputs

Applications

• Data routing in digital systems
• Signal selection circuits
• Address decoding applications

Procurement Notes

Verify the specific package type matches the required PCB footprint, as the 'N' suffix indicates a PDIP package. Confirm that the HC series input levels are compatible with the driving logic voltages, as they differ from HCT or LVC families. Ensure the operating environment stays within the specified temperature range. Check for any recent product change notices regarding manufacturing updates.

Selection Notes

Select this component when dual independent multiplexing is required with through-hole mounting. The HC series offers high speed and low power compared to older logic families. Verify that the 2V to 6V supply range suits the system design. Consider the PDIP-14 package constraints for board space. Compare against SN74HCT253N if TTL-compatible inputs are needed instead of CMOS inputs.

Part Context

This part belongs to the Texas Instruments 74HC series of high-speed CMOS logic devices. The 74HC253 specifically provides dual 4-input multiplexers. It is part of a broader ecosystem of compatible logic gates and flip-flops designed for general-purpose digital applications. The HC series is widely used in consumer electronics and industrial control systems due to its balance of speed and power efficiency.

Replacement Considerations

SN74HCT253N: Compatible alternative with TTL-compatible input thresholds but requires a 5V supply. SN74HC253DR: Surface-mount equivalent in SOIC-16 package. SN74AHCT253: Faster performance with TTL-compatible inputs.