Overview
The SN74HC08NG4, produced by Texas Instruments, is a quadruple 2-input AND gate integrated circuit. This device is part of the 74HC series, known for its high-speed CMOS logic and wide operating voltage range. It contains four independent 2-input AND gates, each performing the Boolean function Y = A ● B in positive logic. This makes it versatile for various digital logic applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | -0.5 | - | 7 | V |
| Operating Temperature | -40 | - | 85 | °C |
| Input Clamp Current (IIK) | - | - | ±20 | mA |
| Output Clamp Current (IOK) | - | - | ±20 | mA |
| Continuous Output Current (IO) | - | - | ±25 | mA |
| Propagation Delay (tpd) | - | 8 | - | ns |
| Output High Voltage (VOH) at VCC = 5V, IOH = -4mA | 3.98 | - | 4.3 | V |
| Output Low Voltage (VOL) at VCC = 5V, IOL = 4mA | 0.17 | - | 0.26 | V |
| Input Current (II) | - | - | ±1 | µA |
| Power Dissipation Capacitance per Gate (Cpd) | - | 20 | - | pF |
Key Features
- Buffered Inputs: Ensures stable and reliable input signals.
- Wide Operating Voltage Range: Operates from 2 V to 6 V, making it versatile for various applications.
- Wide Operating Temperature Range: Functions from -40°C to 85°C.
- High Fanout Capability: Can drive up to 10 LSTTL loads.
- Low Power Consumption: Maximum ICC of 20 µA.
- Low Input Current: Maximum input current of 1 µA.
- Balanced CMOS Push-Pull Outputs: Allows the device to sink and source similar currents, ensuring balanced output.
- Fast Propagation Delay: Typical propagation delay of 8 ns.
Applications
- Combining Power Good Signals: Useful in power management systems where multiple signals need to be logically combined.
- Enabling Digital Signals: Can be used to enable or disable digital signals based on specific conditions.
- General Digital Logic Circuits: Suitable for any application requiring 2-input AND gate functions.
- Creating Complex Logic Functions: Can be combined to create more complex logic functions, such as a 4-input AND gate.
Q & A
- What is the function of the SN74HC08NG4?
The SN74HC08NG4 contains four independent 2-input AND gates, each performing the Boolean function Y = A ● B in positive logic.
- What is the operating voltage range of the SN74HC08NG4?
The device operates from 2 V to 6 V.
- What is the operating temperature range of the SN74HC08NG4?
The device functions from -40°C to 85°C.
- How many LSTTL loads can the SN74HC08NG4 drive?
The device can drive up to 10 LSTTL loads.
- What is the typical propagation delay of the SN74HC08NG4?
The typical propagation delay is 8 ns.
- What is the maximum input current of the SN74HC08NG4?
The maximum input current is 1 µA.
- Can the SN74HC08NG4 be used to create more complex logic functions?
Yes, it can be combined to create more complex logic functions, such as a 4-input AND gate.
- What are the package options available for the SN74HC08NG4?
The device is available in various packages including SOIC, SSOP, PDIP, SO, TSSOP, CDIP, CFP, and LCCC.
- How does the balanced CMOS push-pull output feature benefit the device?
The balanced output allows the device to sink and source similar currents, ensuring balanced output and preventing issues like ringing in light loads.
- What is the significance of low power consumption in the SN74HC08NG4?
The low power consumption (maximum ICC of 20 µA) reduces overall system power requirements and heat generation.
