Overview
The SN74AHC138PWRE4 is a high-performance, 3-to-8 line decoder/demultiplexer produced by Texas Instruments. It is designed for applications requiring high-speed decoding and data routing, particularly in memory systems and data transmission. This component is part of the AHC (Advanced High-Speed CMOS) family, known for its low power consumption and compatibility with low-power Schottky TTL (LSTTL) logic levels. The SN74AHC138PWRE4 is widely used in consumer electronics, industrial automation, and embedded systems due to its robust performance and versatility.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 2.0 to 5.5 | V | |
| Propagation Delay | 15 | ns | Typical at 5V |
| Input Current | ±1 | µA | Maximum |
| Output Current | ±8 | mA | |
| Operating Temperature | -40 to 85 | °C | |
| Package | TSSOP-16 |
Key Features
- High-speed decoding with a propagation delay of 15 ns.
- Wide operating voltage range from 2.0V to 5.5V.
- Low power consumption with a maximum supply current of 80 µA.
- Compatible with LSTTL logic levels for seamless integration.
- Three enable inputs for simplified cascading and data routing.
Applications
The SN74AHC138PWRE4 is commonly used in memory decoding, data routing, and I/O expansion applications. It is ideal for systems requiring efficient address decoding, such as in LED displays, servers, and industrial automation. Its low power consumption and high-speed performance make it suitable for consumer electronics and embedded systems where energy efficiency and reliability are critical.
Q & A
1. What is the operating voltage range of the SN74AHC138PWRE4?
The operating voltage range is from 2.0V to 5.5V.
2. What is the typical propagation delay of this decoder?
The typical propagation delay is 15 ns at 5V.
3. Is the SN74AHC138PWRE4 compatible with TTL logic levels?
Yes, it is compatible with low-power Schottky TTL (LSTTL) logic levels.
4. How many enable inputs does this decoder have?
It has three enable inputs: two active low (E1 and E2) and one active high (E3).
5. What is the maximum supply current of the SN74AHC138PWRE4?
The maximum supply current is 80 µA.
6. What is the package type of this component?
It is available in a TSSOP-16 package.
7. Can this decoder be used for I/O expansion?
Yes, it is commonly used for I/O expansion in microcontroller-based systems.
8. What is the output current capability of the SN74AHC138PWRE4?
The output current capability is ±8 mA.
9. What are the typical applications of this decoder?
Typical applications include memory decoding, data routing, and LED display control.
10. What is the operating temperature range of this component?
The operating temperature range is from -40°C to 85°C.
