Overview
The 74HC21DB,112 is a dual 4-input AND gate produced by Nexperia, which was previously part of NXP Semiconductors. This component is part of the 74HC family, known for its high-speed CMOS logic. Although the specific part number 74HC21DB,112 has been discontinued, it remains relevant for understanding and utilizing similar logic gates in electronic circuits.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Type Number | 74HC21DB | Dual 4-input AND gate |
| Package | SSOP14 (SOT337-1) | Shrink small outline package; 14 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm body |
| Supply Voltage Range | 2.0 to 6.0 V | Compliant with JEDEC standards JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V) |
| Operating Temperature Range | -40 °C to +85 °C and -40 °C to +125 °C | Specified temperature ranges for operation |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V | Electrostatic discharge protection levels |
| Latch-up Performance | Exceeds 100 mA per JESD 78 Class II Level B | High latch-up performance |
Key Features
- Wide Supply Voltage Range: Operates from 2.0 to 6.0 V, making it versatile for various applications.
- CMOS Low Power Dissipation: Low power consumption, which is beneficial for battery-powered devices and energy-efficient designs.
- High Noise Immunity: Provides robust performance in noisy environments.
- ESD Protection: High electrostatic discharge protection levels (HBM and CDM) to ensure component reliability.
- Clamp Diodes on Inputs: Allows the use of current limiting resistors to interface inputs to voltages in excess of VCC.
- Compliance with JEDEC Standards: Meets JESD8C and JESD7A standards, ensuring compatibility and reliability.
Applications
The 74HC21DB,112 is suitable for a variety of applications where high-speed CMOS logic is required. These include:
- Digital Logic Circuits: Ideal for implementing complex digital logic functions in electronic systems.
- Embedded Systems: Used in microcontroller and microprocessor-based systems for logical operations.
- Industrial Control Systems: Employed in control circuits for industrial automation and monitoring.
- Consumer Electronics: Found in various consumer electronic devices requiring high-speed logic operations.
Q & A
- What is the primary function of the 74HC21DB,112?
The primary function of the 74HC21DB,112 is to act as a dual 4-input AND gate.
- What is the supply voltage range for this component?
The supply voltage range is from 2.0 to 6.0 V.
- What type of package does the 74HC21DB,112 come in?
The component comes in an SSOP14 (SOT337-1) package.
- Does the 74HC21DB,112 have ESD protection?
- What are the operating temperature ranges for this component?
The operating temperature ranges are -40 °C to +85 °C and -40 °C to +125 °C.
- Is the 74HC21DB,112 still available for purchase?
No, the 74HC21DB,112 has been discontinued.
- What are some common applications for the 74HC21DB,112?
Common applications include digital logic circuits, embedded systems, industrial control systems, and consumer electronics.
- Does the 74HC21DB,112 comply with any specific standards?
- What is the significance of the clamp diodes on the inputs?
The clamp diodes allow the use of current limiting resistors to interface inputs to voltages in excess of VCC.
- How does the 74HC21DB,112 handle noise immunity?
The component has high noise immunity, ensuring robust performance in noisy environments.
