Overview
The SN74LS38NG4 is a quad 2-input NAND buffer gate with open-collector outputs, manufactured by Texas Instruments. This integrated circuit (IC) belongs to the 74LS series of logic devices, which are widely used in digital logic applications. The SN74LS38NG4 is designed for general-purpose logic functions and is particularly suitable for applications requiring open-collector outputs, such as bus interfacing and signal buffering. Its market positioning targets engineers and designers working on digital systems, embedded systems, and industrial automation. The product stands out for its reliability, low power consumption, and compatibility with TTL logic levels.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Logic Type | NAND Gate | - | Quad 2-input |
| Output Type | Open-Collector | - | - |
| Supply Voltage (VCC) | 4.75 to 5.25 | V | TTL compatible |
| Operating Temperature | 0 to 70 | °C | Commercial grade |
| Propagation Delay | 15 | ns | Typical at 5V |
| Input Current (IIN) | -1.6 | mA | Max at 0.4V |
| Output Current (IOH) | -0.4 | mA | Max at 2.4V |
| Package | PDIP-14 | - | Plastic Dual In-line Package |
| Mounting Type | Through Hole | - | - |
| RoHS Compliance | Yes | - | - |
Key Features
- Quad 2-input NAND gates with open-collector outputs for flexible interfacing.
- TTL compatibility ensures seamless integration with existing logic systems.
- Low power consumption makes it suitable for battery-powered applications.
- Robust design with a wide operating voltage range and high noise immunity.
- Open-collector outputs allow for wired-AND connections and bus driving capabilities.
Applications
The SN74LS38NG4 is widely used in various digital logic applications, including:
- Industrial automation: Signal buffering and interfacing in control systems.
- Consumer electronics: Logic functions in devices such as gaming consoles and home appliances.
- Automotive electronics: Integration into vehicle control units and infotainment systems.
- Embedded systems: Core logic operations in microcontrollers and processors.
- Bus interfacing: Driving and interfacing with shared data buses in communication systems.
Q & A
1. What is the function of the SN74LS38NG4?
The SN74LS38NG4 is a quad 2-input NAND gate with open-collector outputs, used for general-purpose logic operations.
2. What is the operating voltage range?
The operating voltage range is 4.75V to 5.25V, making it compatible with TTL logic levels.
3. What are open-collector outputs?
Open-collector outputs allow the device to sink current but not source it, enabling wired-AND connections and bus interfacing.
4. Is the SN74LS38NG4 RoHS compliant?
Yes, the SN74LS38NG4 is RoHS compliant.
5. What is the propagation delay?
The typical propagation delay is 15 ns at 5V.
6. What package does the SN74LS38NG4 use?
It comes in a PDIP-14 (Plastic Dual In-line Package) with through-hole mounting.
7. Can it be used in automotive applications?
Yes, it is suitable for automotive electronics, such as control units and infotainment systems.
8. What is the maximum input current?
The maximum input current is -1.6 mA at 0.4V.
9. What is the output current capability?
The maximum output current is -0.4 mA at 2.4V.
10. Is the SN74LS38NG4 suitable for industrial automation?
Yes, it is ideal for signal buffering and interfacing in industrial automation systems.
