IC 7474 Dual D-Type Flip-Flop

The IC 7474 Dual D-Type Flip-Flop contains two positive-edge-triggered D flip-flops with preset and clear inputs. It is fundamental for sequential logic, data storage, counters, and state machine circuits.

Key Features

• 2 independent D-type flip-flops
• Positive edge-triggered
• Preset and clear inputs
• Complementary outputs (Q and Q̄)
• 14-pin DIP package
• Standard TTL/CMOS compatible
• Reliable data storage

Technical Specifications

Applications

• Data storage
• Shift registers
• Frequency dividers (/2)
• State machines
• Debouncing circuits
• Clocked logic systems

Important Notes

• Preset and Clear are active-LOW (usually pulled HIGH)
• Data at D input is transferred to Q on clock rising edge
• Setup time: D must be stable before clock edge
• Can create toggle flip-flop by connecting Q̄ to D
• Unused flip-flop should have clock tied to valid level