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Texas Instruments CD74HCT21E — Logic ICs

CD74HCT21E 74HCT AND Gate, 27ns, -55 to 125°C, PDIP-14

MPNCD74HCT21E
End of Life

Texas Instruments CD74HCT21E, 74HCT series, dual 4-input AND gate, 4.5V–5.5V supply, 27ns max propagation delay at 4.5V/50pF, -55°C to 125°C, 14-pin PDIP through-hole package.

$0.43Ref. price · indicative, final on quote
Texas Instruments CD74HCT21E datasheet (PDF)
Packaging14-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74HCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CD74HCT21E specifications
ParameterValue
Series74HCT
Logic typeAND Gate
MountingThrough Hole
Supply voltage4.5V ~ 5.5V
Current - quiescent2 µA
Current - output high, low4mA, 4mA
I/O channels4
Operating temperature-55°C ~ 125°C
PackageTube
Case14-DIP (0.300\", 7.62mm)
Number of circuits2
Input logic level - low0.8V
Input logic level - high2V
Max propagation delay @ v, max CL27ns @ 4.5V, 50pF

Product details

Military temperature range – avionics and industrial use

Rated for -55°C to 125°C operating temperature, this gate can be specified for avionics, satellite, downhole drilling, and outdoor industrial control where the ambient swings beyond commercial or even extended industrial limits. The through-hole PDIP package (14-DIP, 0.300" wide) is socket-friendly and easy to hand-rework, which matters in low-volume or high-reliability builds where reflow isn't an option.

Active lifecycle – no LTB risk

It is RoHS3 compliant (lead-free). For production BOMs that need a through-hole AND gate, this part is a straightforward fit without obsolescence planning overhead.

Frequently asked questions

What is the propagation delay of CD74HCT21E?

Maximum propagation delay is 27ns at 4.5V supply with a 50pF load. This sets the timing margin for 5V bus and control logic.

What are the alternatives to CD74HCT21E?

The SN74HC21N is a functional alternative in the 74HC family, but note its 2V to 6V supply range and narrower -40°C to 85°C temperature grade. The CD74HCT21E's -55°C to 125°C range and TTL-compatible inputs are the deciding factors for military-temp or mixed 5V-TTL designs.

Is CD74HCT21E RoHS compliant?

Yes, CD74HCT21E is RoHS3 compliant.