74LS74 IC Dual D-Type Positive Edge-Triggered Flip-Flop with Preset and Clear HLF DIP-14 74LS74

Product Overview

The 74LS74A (specifically the DM74LS74A) is a dual positive-edge-triggered D-type flip-flop. It features independent preset and clear inputs, allowing for asynchronous control of the outputs. Each flip-flop is "D-type," meaning it captures the state of the data ($D$) input on the rising edge of the clock pulse. The device provides both true and complementary outputs ($Q$ and $\bar{Q}$), making it highly versatile for digital state machines, shift registers, and frequency dividers.

Core Specifications

• Manufacturer: Fairchild Semiconductor

• Function: Dual Positive-Edge-Triggered D Flip-Flop

• Inputs: Independent D input, Clock, Preset, and Clear for each flip-flop.

• Triggering: Positive-edge-triggered (data is accepted on the rising edge of the clock).

• Asynchronous Control: A low logic level on the Preset or Clear inputs overrides the clock and data inputs, immediately setting or resetting the output.

• Logic Family: Low-power Schottky (LS) TTL.