CD74HCT257MT

Overview

The CD74HCT257MT is a high-speed CMOS logic device manufactured by Texas Instruments, belonging to the 74HCT series. It functions as a quad 2-input multiplexer with three-state non-inverting outputs. The component is housed in a 16-lead Small Outline Package (SOIC) designed for surface-mount technology applications. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an extended industrial temperature range from -55°C to +125°C. The package configuration utilizes a tube format.

Feature Summary

• Integrates four independent 2-to-1 data selectors within a single integrated circuit
• Provides three-state output capability for effective bus line driving and isolation
• Features non-inverting logic operation for direct signal path transmission
• Utilizes high-speed CMOS technology compatible with standard TTL logic levels

Applications

• Data routing in digital communication systems
• Address decoding circuits
• Signal selection in microprocessor-based systems
• Multiplexing sensor inputs for analog-to-digital conversion

Procurement Notes

Verify the specific suffix 'MT' confirms the surface-mount SOIC-16 packaging and tape-and-reel or tube availability status. Confirm RoHS compliance and lead-free material declarations against current manufacturer documentation. Ensure the operating temperature range meets the specific environmental requirements of the target application before finalizing procurement.

Selection Notes

Select this component when a quad multiplexer with three-state outputs is required in a surface-mount design. The HCT logic family ensures compatibility with 5V TTL inputs while offering CMOS noise immunity. Verify that the 16-pin SOIC footprint aligns with the PCB layout constraints and that the 4.5V to 5.5V supply voltage matches the system power rails.

Part Context

This part belongs to the Texas Instruments 74HCT logic family, which bridges the performance gap between standard 74LS and 74HC series. The 74HCT257 variant specifically provides high-speed switching characteristics suitable for complex digital logic applications requiring multiple data paths.

Replacement Considerations

Compatible substitutes include SN74HCT257DR for surface-mount variants and CD74HCT257E for through-hole DIP packages. Cross-reference with other manufacturers' 74HCT257 equivalents ensuring identical pinout and electrical specifications.