Dual 4-input AND gate in 14-SOIC
The CD74HC21M96 is a dual 4-input AND gate from TI's 74HC family, packaged in a 14-SOIC (3.90 mm width) for surface-mount assembly. It operates across a 2V to 6V supply range and delivers 5.2 mA output drive per channel — enough to fan out to a handful of standard CMOS or TTL loads on the same board. The -55°C to 125°C temperature grade covers military and industrial environments, so it fits avionics, satellite, downhole instrumentation, or outdoor telecom gear where the ambient swings hard.
19 ns propagation delay — timing margin for the bus
Max propagation delay is 19 ns at 6 V supply with a 50 pF load. That is the same speed as the through-hole SN74HC21N (also 19 ns at 6 V, 50 pF), but in a smaller surface-mount footprint. If your design needs a Schmitt-trigger input for noisy lines, the CD74HCT132M96 is a 4-input NAND with hysteresis, though its delay stretches to 33 ns at 4.5 V. The CD74HC21M96 is the cleaner choice for glueless AND gating where you want the full 2V–6V swing and the wide temperature range.
Active lifecycle, ROHS3, and sourcing posture
TI lists the CD74HC21M96 as Active and ROHS3 compliant.