CD54HC21F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
Texas Instruments CD54HC21F3A is a dual 4-input AND gate from the HC/UH CMOS logic family, featuring a 50 pF load capacitance rating and 5.2 mA output sink current. Housed in a 14-pin ceramic DIP package, it is qualified for extended temperature and high-reliability applications. Available in tube packaging for military, aerospace, and industrial control designs.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- CD54HC21F3A Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Non-compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD54HC21F3A?
- Dual 4-input AND gate in HC/UH CMOS family with 50 pF load capacitance for reliable high-speed logic operation
- 14-pin ceramic DIP (CDIP) package provides superior hermeticity and temperature stability for military and aerospace environments
- 5.2 mA output sink current (I(ol)) enables direct drive of standard CMOS and TTL loads without external buffers
What is CD54HC21F3A used for?
The CD54HC21F3A is suited for high-reliability logic designs in military avionics, space electronics, and industrial control systems requiring hermetic ceramic DIP packaging. Its dual 4-input AND gate configuration supports complex combinational logic in safety-critical systems where ceramic packaging ensures long-term hermeticity. The HC/UH CMOS family compatibility enables use in mixed-logic environments alongside other 74HC series devices across extended temperature ranges.
What are the specifications of CD54HC21F3A?
| Pbfree Code | Yes |
| Reach Compliance Code | Not Compliant |
| YTEOL | 15 |
| Family | HC/UH |
| JESD-30 Code | R-GDIP-T14 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | AND GATE |
| Max I(ol) | 0.0052A |
| Number of Functions | 2 |
| Number of Inputs | 4 |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 33ns |
| Propagation Delay (tpd) | 165ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Non-compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the CD54HC21F3A datasheet?
CD54HC21F3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD54HC21F3A?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the logic function and input count of the CD54HC21F3A?
The CD54HC21F3A contains 2 independent 4-input AND gates in a single 14-pin ceramic DIP package, rated with a 50 pF load capacitance per output. Each gate requires all 4 inputs to be high before the output goes high, making it useful for multi-condition enable or address decode logic in high-reliability circuits.
Why choose the ceramic DIP package of the CD54HC21F3A over plastic DIP alternatives for avionics?
The CD54HC21F3A's 14-pin ceramic DIP (CDIP) package provides hermetic sealing that prevents moisture ingress, giving a YTEOL of 15 years and far greater long-term reliability than plastic PDIP packages. This is mandatory for military avionics and aerospace programs that specify MIL-STD-883 or equivalent qualification for logic components.
How does the CD54HC21F3A output current specification affect its ability to drive downstream logic?
With a maximum output low current (I(ol)) of 5.2 mA, the CD54HC21F3A can sink enough current to directly drive standard 74HC and TTL-compatible inputs without additional buffers in most designs. This current capability, combined with 50 pF load capacitance tolerance, ensures adequate fanout for typical gate-to-gate connections in industrial control and instrumentation logic boards.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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