74ALVC16500MTDX

Overview

The DM74LS164MX is an 8-bit serial-in parallel-out shift register from the LS TTL series. It features gated serial inputs and an asynchronous clear function. The device operates with a maximum frequency of 25 MHz at nominal supply voltage. It utilizes a 14-pin SOIC package (MS-120) with a length of 8.65 mm. The logic type is serial in parallel out, offering true output polarity. It supports right-direction counting and functions within a temperature range up to 70 °C.

Feature Summary

• Features gated serial inputs that inhibit new data entry when low, resetting the first flip-flop at the next clock pulse for complete control over incoming data.

Applications

• Serial-to-parallel data conversion
• Parallel load applications

Procurement Notes

Verify the specific manufacturer and date code against current availability, as component sourcing can vary. Confirm RoHS compliance status if required by your design specifications, noting that some listings indicate non-compliance. Ensure the SOIC-14 package matches your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component for designs requiring basic 8-bit serial shifting capabilities using standard TTL logic levels. Consider the 25 MHz maximum operating frequency for timing constraints. Verify that the 14-pin SOIC package dimensions fit the available board space and that the asynchronous clear feature meets the system reset requirements.

Part Context

This part belongs to the Fairchild Semiconductor DM74LS series, which are compatible with standard 74LS logic families. It serves as a fundamental building block for digital systems needing serial data input expansion. The LS series offers a balance of speed and power consumption suitable for general-purpose logic applications.

Replacement Considerations

Check for direct pin-compatible equivalents from other manufacturers such as Texas Instruments or ON Semiconductor. Verify that any substitute maintains the same 8-bit capacity, serial-in parallel-out functionality, and SOIC-14 packaging to ensure seamless integration without redesigning the circuit board.