74HC21D,653

Overview

The Nexperia 74HC21D,653 is a dual 4-input AND gate in the 74HC logic family. It operates on a supply voltage (VCC) ranging from 2.0 V to 6.0 V and supports an ambient temperature range of -40 °C to +125 °C. The device features clamp diodes on inputs for high-voltage interfacing. Static characteristics include a maximum input leakage current of ±1 µA at 6.0 V and a typical power dissipation capacitance of 15 pF. Dynamic performance specifies propagation delays up to 165 ns at 2.0 V and 28 ns at 6.0 V. It is housed in a 14-lead SO14 plastic small outline package (SOT108-1).

Feature Summary

• Dual 4-input AND gate configuration with CMOS low power dissipation.
• Wide supply voltage range supporting operation from 2.0 V to 6.0 V.
• High noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
• Input clamp diodes enable interface to voltages exceeding VCC using current limiting resistors.

Applications

• Digital logic circuits requiring dual 4-input AND functionality.
• Systems utilizing CMOS technology for low power consumption.
• Applications requiring high noise immunity in digital signal processing.

Procurement Notes

Verify that the specific ordering suffix

Selection Notes

Select this component when a dual 4-input AND gate is required within the 74HC series. Ensure the design accommodates the specified supply voltage range of 2.0 V to 6.0 V. Consider the propagation delay variations across the voltage and temperature ranges if timing constraints are critical. Confirm that the SO14 package dimensions fit the PCB layout requirements.

Part Context

The 74HC21 belongs to the Nexperia 74HC (High-speed CMOS) logic family, which offers performance comparable to TTL but with lower power consumption. The 'D' suffix indicates the SO14 package variant, while ',653' denotes the standard tape and reel packaging format used for surface-mount assembly. This part is distinct from the 74HCT21, which is designed for 5 V CMOS-to-TTL compatibility.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent 74HC21 devices in SO14 packages. Verify pinout compatibility and electrical specifications such as propagation delay and supply voltage ranges before substitution.