SN74F21NG4 Texas Instruments Inductor (Dual-In-Line Packages) In Stock
SN74F21NG4 is a dual 4-input AND gate IC from Texas Instruments in the fast TTL (F-series) logic family. It integrates two independent channels, each with 4 inputs, in a 14-pin DIP package, offering propagation delays under 5 ns for high-speed digital logic designs in industrial and computing applications.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- SN74F21NG4 Datasheet PDF
- Category
- Inductor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual 4-input AND gate in a single 14-pin DIP package
- Fast TTL (F-series) logic with propagation delay under 5 ns
- Two independent AND channels for flexible logic gating
- Compatible with standard 5 V TTL and LSTTL logic levels
- 14-pin through-hole DIP for easy prototyping and legacy system integration
Applications
The SN74F21NG4 is used in high-speed digital control logic, bus arbitration circuits, and address decoding systems where fast AND-gate functionality is required. Its dual 4-input configuration suits applications like interrupt enable logic, multi-condition interlock circuits, and combinational logic trees in industrial controllers. The through-hole 14-pin DIP package also makes it popular for prototyping boards and maintenance replacement in existing 5 V TTL systems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74F21NG4:
Frequently Asked Questions
How fast is the SN74F21NG4 compared to standard TTL logic gates for timing-critical designs?
As an F-series (Fast TTL) device, the SN74F21NG4 offers propagation delays of approximately 3 ns to 5 ns, which is significantly faster than the 10 ns to 15 ns typical of standard 74xx TTL, making it suitable for clock gating and high-speed combinational logic at 5 V supply rails.
Can both AND gate channels of the SN74F21NG4 operate independently in a single design?
Yes, the two 4-input AND channels in the 14-pin DIP package are fully independent with separate input and output pins, allowing each channel to perform different logic functions simultaneously, which reduces chip count and saves board space in designs needing multiple gating operations.
For legacy industrial system upgrades, does the 14-pin DIP format simplify field replacement of older AND gates?
The 14-pin through-hole DIP package is a direct pin-compatible replacement for many older 74xx-series dual 4-input AND gate ICs, making board-level swap-outs straightforward in industrial systems originally designed for standard TTL logic at 5 V supply voltages.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 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
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”