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SN74HC21N

Name: SN74HC21N
Rating: 4.7 (12 reviews)

IC GATE AND 2CH 4-INP 14DIP

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仕様

Package	Tube
Series	74HC
ProductStatus	Active
LogicType	AND Gate
NumberofCircuits	2
NumberofInputs	4
Voltage-Supply	2V ~ 6V
Current-Quiescent(Max)	2 µA
Current-OutputHighLow	5.2mA, 5.2mA
LogicLevel-Low	0.5V ~ 1.8V
LogicLevel-High	1.5V ~ 4.2V
MaxPropagationDelay@VMaxCL	19ns @ 6V, 50pF
OperatingTemperature	-40°C ~ 85°C
MountingType	Through Hole
SupplierDevicePackage	14-PDIP

概要

Description

The SN74HC21N is a dual 4-input NAND gate IC from Texas Instruments, part of the 74HC (High-Speed CMOS) series. It operates with a supply voltage range of 2V to 6V and is known for its high-speed performance and low power consumption. The device features two independent NAND gates, each with four inputs, allowing for versatile logic functions in digital circuits.
Key characteristics include a propagation delay of around 6 ns at 5V, making it suitable for high-frequency applications. It is designed to interface seamlessly with other TTL and CMOS logic families. The SN74HC21N is available in various packages, including DIP, SOIC, and TSSOP, making it adaptable for different circuit designs.
Applications include digital signal processing, data routing, and general-purpose logic applications in consumer electronics, computers, and industrial controls. Its robustness and reliability make it a popular choice among engineers for building complex logic circuits.

Features

The SN74HC21N is a dual 4-input NAND gate IC designed for high-speed applications. Key features include:
1. Dual Functionality: Contains two independent 4-input NAND gates, allowing for versatile logic operations.
2. High-Speed Operation: Capable of operating at high frequencies, suitable for fast digital circuits.
3. TTL Compatibility: Compatible with TTL logic levels, ensuring interoperability with other devices in a digital system.
4. Voltage Range: Operates typically from 2V to 6V, making it versatile for various power supply levels.
5. Low Power Consumption: Consumes minimal power, making it ideal for battery-operated devices.
6. Wide Temperature Range: Functional over a temperature range of -40°C to +125°C, ensuring reliability in diverse environmental conditions.
7. Standard Package: Available in various package types, including DIP and SOIC, for easy integration into circuits.
Overall, the SN74HC21N provides reliable, fast, and efficient logic processing for a broad range of electronic applications.

Package

The SN74HC21N is typically packaged in a DIP (Dual In-line Package) format, specifically in a 14-pin DIP configuration. It can also be found in other package types like SOIC or TSSOP, depending on the manufacturer and specific variant.

Pinout

The SN74HC21N is a dual 4-input NAND gate integrated circuit. It has a total of 14 pins. The pin configuration is as follows:
- Pins 1, 2, 3, 4: Input A, B, C, D for the first NAND gate.
- Pin 5: Output Y1 for the first NAND gate.
- Pins 6, 7, 8, 9: Input A, B, C, D for the second NAND gate.
- Pin 10: Output Y2 for the second NAND gate.
- Pin 11: Ground (GND).
- Pin 14: VCC (power supply).
- Pins 12 and 13: Not connected.
The SN74HC21N operates with standard logic levels and is suitable for high-speed applications, making it ideal for digital signal processing and various logic applications.

Manufacturer

The SN74HC21N is manufactured by Texas Instruments (TI), a leading American technology company. Founded in 1930, Texas Instruments specializes in designing and manufacturing semiconductors and various integrated circuits. The company is well-known for its innovations in analog and digital signal processing, microcontrollers, and embedded processors, serving a wide range of industries including automotive, industrial, consumer electronics, and telecommunications. Texas Instruments is also recognized for its commitment to research and development, making it a significant player in the global electronics market.

Application

The SN74HC21N is a dual 4-input NAND gate IC used in various applications, including digital logic design, signal processing, and control systems. It is suitable for implementing complex logical functions, arithmetic operations, and decision-making circuits. Common areas include consumer electronics, automotive systems, industrial automation, and communication devices, where reliable and fast digital signal manipulation is required.

Equivalent

The SN74HC21N is a dual 4-input NAND gate. Equivalent products include the 74HC21, 74HCT21, 74LS21, and other variations in similar logic families. Additionally, compatible equivalents might be found in other manufacturers' portfolios, such as MC74HC21 from ON Semiconductor and TC74HC21 from Toshiba. Always check datasheets for specific electrical characteristics and package types.