74LS21 Dual 4 input AND Gate IC (7421) DIP 14 Package

74LS21 Dual 4 input AND Gate IC (7421) DIP 14 Package

The 74LS21 is a Dual 4-Input AND Gate integrated circuit from the 74LS TTL (Low Power Schottky) logic family.
It contains two independent 4-input AND gates, each performing a logical AND operation on four input signals.

The output of each gate goes HIGH only when all four inputs are HIGH, making it useful for logic combinations, control signals, and digital decision-making applications.
The 74LS21 features high speed, low power consumption, and excellent noise immunity, typical of TTL LS devices.

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Specifications:-

Features Summary

• Dual 4-input AND gates
• TTL compatible inputs and outputs
• Fast switching time (~10 ns)
• Low power consumption
• Ideal for combining multiple logic signals
• Reliable operation and standard 5V TTL performance

Applications

• Logic signal combination circuits
• Control signal generation
• Enable and gating functions
• Timing and synchronization logic
• Digital control systems
• Data selection and address decoding
• Microprocessor logic interfacing

74ls21-ic-datasheet