SN74HC138N

The SN74HC138N is a high-performance 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments. It is designed for use in high-performance memory decoding or data routing applications where very short propagation delays are required.

Key Features:

• 3-to-8 Line Decoder/Demultiplexer: The SN74HC138N accepts three binary input lines (A, B, C) and decodes them to activate one of eight output lines (Y0 to Y7).
• CMOS Technology: Utilizing CMOS technology, the IC offers low power consumption and high noise immunity.
• Fast Propagation Delay: With a typical propagation delay of 45 nanoseconds (ns), the SN74HC138N ensures rapid signal processing.
• Wide Supply Voltage Range: The IC operates over a wide supply voltage range of 2V to 6V, making it compatible with various digital systems.
• Three Enable Inputs: The SN74HC138N features three enable inputs, including two active-low enable inputs (G2A, G2B) and one active-high enable input (G1). This allows for flexible control of the decoder’s operation and easy expansion of output lines.
• Package Options: Available in a PDIP-16 package, the SN74HC138N is easy to integrate into circuits and offers reliable performance.

Applications:

• Memory Decoding: The SN74HC138N can be used to decode address lines in memory systems, selecting the appropriate memory location for read or write operations.
• Data Routing: In data routing applications, the decoder can direct data signals to specific destinations based on input codes.
• Automation and Control Systems: The IC can be utilized in automation and control systems for decoding control signals and activating corresponding output devices.

Specifications:

• Supply Voltage (VCC): 2V to 6V
• Propagation Delay: 45 ns (typical)
• Output Current (IOH/IOL): ±5.2 mA
• Maximum Clock Frequency: 28 MHz
• Power Dissipation (Pd): 320 mW
• Operating Temperature Range: -40°C to +85°C

In summary, the SN74HC138N is a versatile and high-performance 3-to-8 line decoder/demultiplexer suitable for a wide range of digital applications. Its fast propagation delay, low power consumption, and wide supply voltage range make it an ideal choice for memory decoding, data routing, and automation and control systems.