SN74LS166MEL

Shift Registers Overview

The SN74LS166MEL is an 8-bit parallel-in serial-out shift register manufactured by Motorola. It belongs to the LS (Low-power Schottky) logic series and utilizes a 16-SOEIAJ package. The device features buffered inputs, reducing drive requirements to one standard LS load. It operates with a true output and supports right-direction shifting. Key electrical parameters include a maximum operating frequency of 25 MHz, a propagation delay of 25 ns, and a supply voltage range of 4.75 V to 5.25 V. The component is designed for TTL applications.

Shift Registers Feature Summary

• Parallel-in serial-out data conversion capability
• Buffered inputs for reduced drive requirements
• Right-direction shifting functionality
• True output polarity

Shift Registers Applications

• Serial data transmission systems
• Parallel-to-serial data conversion interfaces
• Digital signal processing circuits requiring shift register functions

Shift Registers Procurement Notes

Verify the manufacturer origin, as this part number has been produced by multiple entities including Motorola and NXP. Confirm the specific package type matches the design requirement, as variations such as PDIP or SOEIAJ exist within the broader SN74LS166 family. Ensure the revision level aligns with your system's compatibility needs. Cross-reference the datasheet provided by the specific supplier to confirm pinout and electrical characteristics match your application constraints before finalizing procurement.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel loading and serial output is required in Low-power Schottky logic families. It is suitable for designs needing buffered inputs to minimize load on preceding stages. Consider the 16-pin package availability and ensure the operating temperature range meets environmental specifications. Verify that the 25 MHz maximum frequency suffices for the target clock speed.

Shift Registers Part Context

The SN74LS166 is part of the widely used 74LS series of digital logic ICs. This specific variant is an 8-bit shift register often employed in communication and data handling circuits. While originally associated with Motorola, production rights have transferred to other manufacturers like NXP and ON Semiconductor over time. The 'MEL' suffix typically denotes a specific package or tape-and-reel configuration depending on the era of manufacture.

Shift Registers Replacement Considerations

Compatible substitutes include SN74LS166AN from Texas Instruments and SN74LS166ND from NXP/Motorola. These parts share the same logical function and pinout but may differ in package style or minor electrical tolerances. Verify compatibility with the specific manufacturing source.