Overview
The SN74AHCT138DR is a 3-to-8 line decoder/demultiplexer produced by Texas Instruments. This component is part of the AHCT series, which is designed for high-speed applications and is compatible with TTL (Transistor-Transistor Logic) voltage levels. It is particularly useful in systems that require decoding or demultiplexing functions, such as memory addressing and data transmission systems.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | SN74AHCT138DR |
| Package | SOIC-16 |
| Supply Voltage Range | 4.5V to 5.5V |
| Input Voltage Range | -0.5 V to 7 V |
| Output Voltage Range | -0.5 V to VCC + 0.5 V |
| Operating Temperature Range | -40°C to 85°C |
| Propagation Delay Time (tPLH, tPHL) | Approx. 5-10 ns at CL = 15 pF, VCC = 5 V |
| Storage Temperature Range | -65°C to 150°C |
| Compliance | RoHS compliant |
Key Features
- TTL-Voltage Compatible Inputs: Designed to be compatible with TTL voltage levels, making it versatile for various applications.
- High-Speed Operation: Optimized for high-speed applications, particularly in memory decoders and data transmission systems.
- Fully Buffered Inputs: Each input represents only one normalized load to its driving circuit, reducing the load on the driving circuit.
- Active-Low Enable Input: The enable input can be used as a data line in demultiplexing applications.
- Multiple Package Options: Available in various packages, including SOIC-16, to suit different design requirements.
Applications
- Memory Decoders: Used in memory addressing systems to minimize system decoding delays.
- Data Transmission Systems: Suitable for high-speed data transmission applications.
- Demultiplexing Applications: Can be used to demultiplex data lines, making it useful in various digital systems.
- General Digital Logic Circuits: Applicable in any digital circuit requiring decoding or demultiplexing functions.
Q & A
- What is the primary function of the SN74AHCT138DR? The primary function is to act as a 3-to-8 line decoder/demultiplexer.
- What is the operating voltage range of the SN74AHCT138DR? The operating voltage range is 4.5V to 5.5V.
- What are the input voltage limits for the SN74AHCT138DR? The input voltage range is -0.5 V to 7 V.
- What is the typical propagation delay time for the SN74AHCT138DR? Approximately 5-10 ns at CL = 15 pF, VCC = 5 V.
- Is the SN74AHCT138DR RoHS compliant? Yes, it is RoHS compliant.
- What are the common applications of the SN74AHCT138DR? Common applications include memory decoders, data transmission systems, and demultiplexing applications.
- What package types are available for the SN74AHCT138DR? It is available in SOIC-16 package among others.
- What is the operating temperature range of the SN74AHCT138DR? The operating temperature range is -40°C to 85°C.
- Can the SN74AHCT138DR be used in high-speed applications? Yes, it is designed specifically for high-speed applications.
- What is the storage temperature range for the SN74AHCT138DR? The storage temperature range is -65°C to 150°C.
