Overview
The 74HC21D is a high-speed CMOS dual 4-input AND gate integrated circuit manufactured by Toshiba Semiconductor and Storage. It is fabricated using silicon gate C2MOS technology, which provides high-speed operation similar to LSTTL while maintaining the low power dissipation characteristic of CMOS devices. This IC is designed to operate over a wide temperature range and is suitable for various digital logic applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2.0 to 6.0 | V |
| Operating Temperature (Topr) | -40 to 125 | °C |
| Propagation Delay Time (tpd) | 10 ns (typ.) at VCC = 5 V | ns |
| Power Dissipation (ICC) | 1.0 µA (max) at Ta = 25 °C | µA |
| Output Drive Capability | ± 5.2 | mA |
| Maximum Frequency (fmax) | 36 MHz | MHz |
| Package Type | SOIC14 |
Key Features
- Wide operating temperature range: -40 °C to 125 °C
- High speed operation: propagation delay time of 10 ns (typ.) at VCC = 5 V
- Low power dissipation: ICC = 1.0 µA (max) at Ta = 25 °C
- Balanced propagation delays: tPLH ≈ tPHL
- Wide operating voltage range: VCC = 2.0 to 6.0 V
- High noise immunity and stable output due to internal buffer stages
- Protection circuits against static discharge and transient excess voltage
- Compliance with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V)
Applications
The 74HC21D is suitable for a variety of digital logic applications, including:
- Digital logic circuits requiring high-speed AND gate operations
- Systems needing low power dissipation and high noise immunity
- Industrial control systems
- Automotive electronics
- Consumer electronics where robust and reliable logic operations are required
Q & A
- What is the 74HC21D IC?
The 74HC21D is a high-speed CMOS dual 4-input AND gate integrated circuit.
- What is the operating temperature range of the 74HC21D?
The operating temperature range is -40 °C to 125 °C.
- What is the typical propagation delay time of the 74HC21D at VCC = 5 V?
The typical propagation delay time is 10 ns.
- What is the maximum power dissipation of the 74HC21D at Ta = 25 °C?
The maximum power dissipation is 1.0 µA.
- What is the output drive capability of the 74HC21D?
The output drive capability is ± 5.2 mA.
- What package type is the 74HC21D available in?
The 74HC21D is available in SOIC14 package.
- Does the 74HC21D have protection against static discharge?
- What JEDEC standards does the 74HC21D comply with?
The 74HC21D complies with JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V) standards.
- What is the maximum frequency of operation for the 74HC21D?
The maximum frequency of operation is 36 MHz.
- Is the 74HC21D suitable for high noise environments?
