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)
Good to know
- 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