The SN54HC21J is an integrated circuit (IC) component that belongs to the 54HC family of devices. It is a dual 4-input positive-AND gate, which means that it can take up to four logic inputs and provide an output only when all four inputs are high.
Key features of the SN54HC21J include:
1. Quad 2-Input Configuration: The IC has two independent AND gates, each capable of accepting four input signals and providing a single output.
2. High-Speed Operation: The 54HC series is known for its high-speed operation, making it suitable for applications where fast response times are crucial.
3. Compatibility: The SN54HC21J is compatible with both CMOS and TTL logic families, allowing for seamless integration into existing circuits.
4. Schmitt-Trigger Inputs: The IC incorporates Schmitt-trigger inputs, enabling it to provide a hysteresis effect, which enhances noise immunity and reduces the possibility of erratic outputs due to input noise.
5. Wide Operating Voltage Range: The SN54HC21J has a wide operating voltage range, typically from 2V to 6V, making it versatile and capable of functioning in various power supply configurations.
6. Balanced Propagation Delay: The propagation delay of the IC is carefully balanced between inputs and outputs, ensuring reliable and synchronized operation across the device
