CD74HCT21EG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The CD74HCT21EG4 is a dual 4-input AND gate logic IC from Texas Instruments in the HCT CMOS family, compatible with TTL input levels and operating on a 5 V supply in a 14-pin DIP package. It provides two independent 4-input AND functions for combinational logic design. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- CD74HCT21EG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- HCT-family TTL-compatible input thresholds enable direct interfacing with 5 V TTL logic without level-shifting circuits
- Dual independent 4-input AND gate configuration provides flexible combinational logic in a single 14-pin DIP package
- High-speed CMOS technology delivers low quiescent current with TTL drive capability for mixed-logic system designs
Applications
The CD74HCT21EG4 is ideal for combinational logic design in digital systems where TTL-to-CMOS interfacing is required, such as address decoding, enable gating, and multi-input control logic in microprocessor-based boards. Its dual 4-input AND gate topology suits PLC control logic, FPGA glue logic, and industrial automation signal conditioning. The 14-pin DIP package also makes it suitable for prototyping, educational lab experiments, and legacy board repair applications.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What logic family does the CD74HCT21EG4 belong to and what supply voltage does it use?
The CD74HCT21EG4 belongs to the HCT (High-speed CMOS TTL-compatible) logic family and operates on a standard 5 V supply, making it directly compatible with 5 V TTL logic systems without requiring additional level translation.
How many AND gate inputs does the CD74HCT21EG4 have?
The CD74HCT21EG4 contains two independent 4-input AND gates, each requiring all four inputs to be logic high to produce a logic high output, enabling multi-condition gating in control and decoding circuits.
What package does the CD74HCT21EG4 use?
The CD74HCT21EG4 is housed in a 14-pin Dual-In-Line (DIP) package, a through-hole format widely used in prototyping, breadboarding, and legacy system repair, with 2.54 mm pin pitch for standard IC socket compatibility.
What are typical applications for the CD74HCT21EG4?
Typical applications include address and chip-select decoding, multi-input enable gating, combinational logic for PLC and microprocessor boards, FPGA ancillary logic, and industrial control signal conditioning where TTL-compatible 4-input AND logic is needed.
Related Guides
AD1836AASZ Multichannel Audio Codec Design Guide for AVR/DSP Integration
Complete application note for the AD1836AASZ 24-bit multichannel audio codec: I2S/TDM serial mode selection, MCLK jitter budget, power supply layout, and AVR/DSP integration.
May 25, 2026
CDCE913PWR vs CDCE925PWR vs CDCE906: Which TI Clock Synthesizer Is Right for Your Design?
Compare the TI CDCE913PWR, CDCE925PWR, and CDCE906 programmable clock synthesizers across PLL count, output channels, EMI spread-spectrum, power, and cost.
May 25, 2026
TPS613222ADBVR Boost Converter Design Guide: Battery-Powered 3.3 V Rail
Design a stable 3.3 V or 5 V boost rail with the TPS613222ADBVR: input/output capacitor sizing, inductor selection, and low-EMI PCB layout for portable battery-powered devices.
May 24, 2026
OPA4277MDTEP Precision Instrumentation Amp Design Guide
Circuit techniques for OPA4277MDTEP precision op-amp: instrumentation amp front-ends, low-side current sensing, photodiode TIA, and thermocouple amplifiers.
May 24, 2026
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.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”