Overview
The SN74AHC138PWRG4 is a high-performance, 3-to-8 line decoder/demultiplexer produced by Texas Instruments. This CMOS device is designed for applications requiring high-speed memory decoding or data routing. It features a wide operating voltage range, low power consumption, and compatibility with low-power Schottky TTL (LSTTL) series. The SN74AHC138PWRG4 is widely used in consumer electronics, industrial automation, and embedded systems, making it a versatile solution for I/O expansion and logic control.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 2.0 to 5.5 | V | |
| Input Voltage | 0 to VCC | V | |
| Output Current | ±8 | mA | |
| Propagation Delay | 10 | ns | Typical |
| Operating Temperature | -40 to 85 | °C | |
| Package | TSSOP-16 | Surface Mount |
Key Features
- 3-to-8 line decoding/demultiplexing functionality.
- Low power consumption with a maximum ICC of 80 µA.
- Wide operating voltage range (2.0 V to 5.5 V).
- High noise immunity and ESD protection.
- Three enable inputs for simplified cascading.
Applications
The SN74AHC138PWRG4 is widely used in various applications, including:
- Consumer Electronics: LED displays, remote controls, and smart home devices.
- Industrial Automation: Control systems, PLCs, and motor drives.
- Embedded Systems: Microcontroller-based projects requiring I/O expansion.
- Telecommunications: Data routing and signal decoding in communication systems.
Q & A
1. What is the operating voltage range of the SN74AHC138PWRG4?
The operating voltage range is 2.0 V to 5.5 V.
2. What is the typical propagation delay?
The typical propagation delay is 10 ns.
3. How many output lines does the SN74AHC138PWRG4 have?
It has 8 output lines (Y0 to Y7).
4. What is the maximum output current?
The maximum output current is ±8 mA.
5. What is the package type of the SN74AHC138PWRG4?
It comes in a TSSOP-16 surface-mount package.
6. What are the enable inputs used for?
The enable inputs (E1, E2, E3) control the operation of the decoder and simplify cascading.
7. Is the SN74AHC138PWRG4 compatible with LSTTL?
Yes, it is compatible with low-power Schottky TTL (LSTTL) series.
8. What is the typical power consumption?
The typical power consumption is 80 µA.
9. Can the SN74AHC138PWRG4 be used in automotive applications?
Yes, it is suitable for automotive electronics, provided it meets the specific environmental and reliability requirements.
10. What is the temperature range for operation?
The operating temperature range is -40°C to 85°C.
