IC 7408 Quad 2-Input AND Gate

The IC 7408 Quad 2-Input AND Gate contains four independent AND gates in a 14-pin DIP package. Each gate outputs HIGH only when both inputs are HIGH, making it fundamental for combinational logic circuits.

Key Features

• 4 independent 2-input AND gates
• Standard TTL logic levels
• 14-pin DIP package
• propagation delay
• Wide availability and low cost
• Compatible with 74HC08 (CMOS version)
• Schmitt trigger inputs (74HCT08)

Technical Specifications

Applications

• Combinational logic
• Digital systems
• Boolean algebra implementations
• Gating signals
• Address decoding
• Logic level detection

Important Notes

• All inputs must be connected – floating inputs cause erratic behavior
• Unused gates should have inputs tied to GND or VCC
• For 3.3V systems, use 74HC08 or 74LVC08
• Decouple VCC with 0.1μF near IC
• Output cannot source much current – use buffer for driving loads