DM74LS175SJ

Overview

The DM74LS175SJ is a quad D-type flip-flop manufactured by Fairchild Semiconductor, utilizing positive-edge-triggered TTL circuitry. It features four independent data inputs and complementary Q and /Q outputs per flip-flop. The device includes buffered clock and direct clear inputs for reliable operation. It operates within a standard voltage range of 4.75V to 5.25V and supports a typical clock frequency of 40 MHz. Packaged in a 16-lead Small Outline Integrated Circuit (SOIC), it provides double-rail outputs suitable for various digital logic applications.

Feature Summary

• Positive-edge-triggered D-type flip-flop logic with complementary outputs
• Buffered clock and direct clear inputs for signal integrity
• Quad configuration providing four independent storage elements

Applications

• Buffer and storage registers
• Shift registers
• Pattern generators

Procurement Notes

Verify the specific suffix 'SJ' against official Fairchild documentation to confirm package dimensions and lead finish specifications. Ensure the component matches the SOIC-16 form factor required for your PCB layout. Cross-reference the manufacturer part number to distinguish between original Fairchild production and potential equivalents from other vendors.

Selection Notes

Select this component when a compact quad D-type flip-flop with complementary outputs is required. The SOIC-16 package offers space efficiency compared to traditional DIP options. Consider the 40 MHz typical clock frequency and TTL input levels to ensure compatibility with the driving logic signals in the target system design.

Part Context

This device belongs to the DM74LS series, representing Low-power Schottky TTL logic. The LS family is known for improved speed-to-power ratio compared to standard 74S devices. As a quad variant, it consolidates four flip-flops into a single package, reducing board space while maintaining the functional characteristics of the broader LS logic family.

Replacement Considerations

Compatible substitutes include SN74LS175N and DM74LS175N. Verify that replacement parts maintain the same SOIC-16 package and electrical specifications to ensure pin-out and performance compatibility.