Texas Instruments

SN74AS138DR

SN74AS138DR Description

The SN74AS138DR is a high-performance 1 x 3:8 decoder/demultiplexer designed by Texas Instruments. This logic IC chip is part of the 74AS series and is optimized for surface-mount applications. It features a single 3:8 decoding circuit with independent operation, making it suitable for a wide range of digital applications. The device operates within a supply voltage range of 4.5V to 5.5V and can function effectively in an operating temperature range of 0°C to 70°C. The SN74AS138DR is packaged in a 16SOIC format and is available in tape and reel (TR) for convenient handling and assembly.

SN74AS138DR Features

• Operating Temperature Range: 0°C to 70°C, ensuring reliable performance in standard industrial environments.
• ECCN Classification: EAR99, indicating compliance with export regulations.
• Independent Circuits: 1 x 3:8 decoding circuit, providing efficient signal routing and control.
• Mounting Type: Surface Mount, ideal for compact and high-density PCB designs.
• Voltage Supply Source: Single Supply, simplifying power management and reducing complexity.
• Series: 74AS, known for high-speed performance and low power consumption.
• Type: Decoder/Demultiplexer, enabling efficient signal decoding and routing.
• Voltage - Supply: 4.5V to 5.5V, ensuring compatibility with a wide range of power supplies.
• REACH Status: REACH Unaffected, ensuring compliance with environmental regulations.
• HTSUS Code: 8542.39.0001, facilitating accurate customs classification.
• Package: Tape & Reel (TR), suitable for automated assembly processes.
• RoHS Status: ROHS3 Compliant, meeting stringent environmental standards.
• Base Product Number: 74AS138, indicating its place in the broader 74AS series.
• Current - Output High, Low: 400µA, 8mA, providing robust output capabilities.
• Moisture Sensitivity Level (MSL): 1 (Unlimited), ensuring the device is safe from moisture damage during storage and handling.

SN74AS138DR Applications

The SN74AS138DR is ideal for applications requiring efficient signal decoding and demultiplexing. Its 1 x 3:8 decoding circuit makes it suitable for digital systems where multiple output lines need to be controlled by a smaller number of input lines. Specific use cases include:

• Digital Systems: Ideal for controlling multiple outputs in digital systems, such as microprocessors and memory devices.
• Control Circuits: Used in control circuits where precise signal routing is necessary.
• Communication Systems: Effective in communication systems for signal decoding and routing.
• Automotive Electronics: Suitable for automotive applications due to its robust performance and compliance with environmental standards.

Conclusion of SN74AS138DR

The SN74AS138DR from Texas Instruments is a versatile and reliable decoder/demultiplexer designed for surface-mount applications. Its 1 x 3:8 decoding circuit offers efficient signal routing and control, making it suitable for a wide range of digital systems. The device's operating temperature range, single supply voltage, and compliance with environmental standards ensure its reliability and compatibility in various industrial environments. The SN74AS138DR's unique features, such as its high output current capabilities and moisture sensitivity level, provide significant advantages over similar models, making it an ideal choice for digital control and communication applications.