Overview
The SNJ54HC08J is a quadruple 2-input AND gate integrated circuit produced by Texas Instruments. This device is part of the 54HC series, which is designed for military and high-reliability applications. It operates within a wide temperature range of -55°C to 125°C and is packaged in a 14-pin CDIP (Ceramic Dual In-Line Package).
The SNJ54HC08J performs the Boolean function Y = A ● B in positive logic for each of its four independent AND gates. This makes it suitable for various digital logic applications where multiple AND operations are required.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2 to 6 | V |
| Operating Temperature Range | -55 to 125 | °C |
| Input Clamp Current (IIK) | ±20 | mA |
| Output Clamp Current (IOK) | ±20 | mA |
| Continuous Output Current (IO) | ±25 | mA |
| Input Leakage Current (II) | ±0.1 to ±1 | µA |
| Supply Current (ICC) | 2 to 20 | µA |
| Input Capacitance (Ci) | 3 to 10 | pF |
| Junction Temperature (TJ) | 150 | °C |
| Storage Temperature (Tstg) | -60 to 150 | °C |
Key Features
- Buffered Inputs: Ensures stable input signals.
- Wide Operating Voltage Range: Operates from 2 V to 6 V.
- Wide Operating Temperature Range: Functional from -55°C to 125°C.
- High Fanout Capability: Supports up to 10 LSTTL loads.
- Low Power Consumption: Significant power reduction compared to LSTTL logic ICs.
- Balanced CMOS Push-Pull Outputs: Capable of sinking and sourcing similar currents.
- Clamp Diode Structure: Includes positive and negative clamping diodes for input and output protection.
Applications
- Combining Power Good Signals: Useful in power management systems where multiple signals need to be combined.
- Enable Digital Signals: Can be used to enable or disable digital signals based on multiple input conditions.
- General Digital Logic: Suitable for any application requiring multiple AND gate operations.
- Creating Higher-Input AND Gates: Can be combined to create higher-input AND gate functions, such as a 4-input AND gate.
Q & A
- What is the operating temperature range of the SNJ54HC08J?
The SNJ54HC08J operates within a temperature range of -55°C to 125°C.
- What is the supply voltage range for the SNJ54HC08J?
The supply voltage range is from 2 V to 6 V.
- How many AND gates are included in the SNJ54HC08J?
The device contains four independent 2-input AND gates.
- What is the maximum continuous output current for the SNJ54HC08J?
The maximum continuous output current is ±25 mA.
- What type of package does the SNJ54HC08J come in?
The SNJ54HC08J is packaged in a 14-pin CDIP (Ceramic Dual In-Line Package).
- What are the key features of the SNJ54HC08J's outputs?
The outputs are balanced CMOS push-pull outputs, capable of sinking and sourcing similar currents.
- Can the SNJ54HC08J be used to create higher-input AND gates?
Yes, multiple gates can be combined to create higher-input AND gate functions.
- What is the recommended input and output voltage ratings for the SNJ54HC08J?
The recommended input and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
- How should unused inputs of the SNJ54HC08J be handled?
Unused inputs must be held at VCC or GND to ensure proper device operation.
- What are the power supply recommendations for the SNJ54HC08J?
A bypass capacitor, typically 0.1-μF, should be used for each VCC terminal to prevent power disturbances.
