74HC21 (7421) Dual 4-input AND Gate IC SMD Package

74HC21 (7421) Dual 4-input AND Gate IC SMD Package.

The 74HC21 (also known as 7421) is a High-Speed CMOS Dual 4-Input AND Gate IC. It contains two independent 4-input AND gates in a single package. Each gate outputs HIGH only when all four inputs are HIGH.

Key Features

• Two (x2) 4-input AND gates
• CMOS high-speed logic
• Low power consumption
• Wide operating voltage: 2V to 6V
• Typical propagation delay: ~9ns at 5V
• Output drive capability: ±6mA
• High noise immunity

Applications

• Digital logic circuits
• Control systems
• Signal gating and combining
• Sensor fusion logic (requiring 4 conditions to be true)
• Address decoding in microcontroller/microprocessor systems
• Timing and synchronization circuits
• Data routing and switching
• Industrial automation and PLC logic
• Embedded system logic control
• Security systems (all triggers must be active)

*product image for illustration purposes only. actual product may vary.