74LS175DC

Overview

The National Semiconductor SN74LS175DC is a low-power Schottky (LSTTL) quad D flip-flop integrated circuit. It contains four independent D-type flip-flops sharing common clock and master reset inputs. Data on the D inputs is stored during the low-to-high clock transition. The device provides both true and complemented outputs for each flip-flop. An asynchronous common reset input clears all flip-flops when LOW, independent of clock or data states. The component utilizes the Schottky barrier diode process for high-speed operation and is compatible with standard TTL families.

Feature Summary

• Edge-triggered D-type inputs with buffered positive-edge-triggered clock
• Asynchronous common reset that clears all flip-flops independently of clock or data
• Provides both true and complemented outputs for each individual flip-flop

Applications

• General-purpose flip-flop requirements in digital logic circuits
• Construction of parallel-in parallel-out registers
• Data storage and synchronization in timing sequences

Procurement Notes

Verify the manufacturer marking matches National Semiconductor or authorized successors such as ON Semiconductor or Texas Instruments. Confirm the package type corresponds to the DC suffix specifications. Check datasheet revisions for pinout consistency across different production eras. Ensure compatibility with system voltage levels before integration.

Selection Notes

Select this component when four independent D flip-flops with shared control signals are required. It is suitable for applications needing both true and inverted outputs without additional inverters. Consider LSTTL speed and power characteristics relative to other logic families. Verify that the asynchronous reset behavior aligns with the system timing requirements.

Part Context

The SN74LS175 belongs to the 74LS series of high-speed low-power Schottky logic devices. It is part of a family of quadruple D flip-flops designed for general digital systems. The device complements other logic components by providing reliable data storage with fast switching speeds. Its design supports complex sequential logic implementations in standard TTL environments.

Replacement Considerations

Compatible substitutes include SN74LS175N from Motorola and SN74LS175 from Fairchild Semiconductor. These parts share identical logical functions and pinouts. Verify package compatibility and electrical specifications before substitution.