74LS74 Dual D type Positive Edge triggered Flip Flops IC (7474) DIP 14 Package

74LS74 Dual D type Positive Edge triggered Flip Flops IC (7474) DIP 14 Package

The 74LS74 is a Dual D-Type Positive Edge Triggered Flip-Flop with Preset and Clear inputs, belonging to the 74LS (Low Power Schottky TTL) logic family.

Each flip-flop stores one bit of data and changes output on the rising edge (positive transition) of the clock signal. The Preset (PRE) and Clear (CLR) inputs are asynchronous (active LOW) and override the clock and data inputs, allowing direct setting or resetting of the flip-flop.

This IC is widely used in data storage, frequency division, registers, counters, and digital timing applications.

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Features:-

• • Two Independent Negative Edge Triggered JK Flip-Flops
• • Standard Pin Arrangement
• • Fast Switching Times
• • Operating Temperature up to 70°C
• • Standard TTL Switching Voltages

Specifications:-

Functional Description

Each flip-flop in the 74LS74 operates independently and follows these rules:

• Preset (PRE?) forces output Q = HIGH (independent of clock or D input).
• Clear (CLR?) forces output Q = LOW (independent of clock or D input).
• When both PRE? and CLR? are HIGH, data on the D input is transferred to the Q output on the rising edge of the clock.
• The Q? output is always the complement of Q.
• This makes it an excellent choice for edge-triggered data latching and state memory in synchronous systems.

Applications

• Data storage and registers
• Frequency dividers / counters
• Toggle flip-flop circuits
• Digital control and timing systems
• Clocked logic synchronization
• Edge-triggered memory elements

74ls74-ic-datasheet