SN74HC139N

The SN74HC139N is a high-performance dual 2-to-4 line decoder/demultiplexer manufactured by Texas Instruments (TI). It is designed for use in digital systems where fast decoding and signal routing are required.

Key Features:

• Dual Decoder Functionality: The SN74HC139N contains two independent 2-to-4 line decoders, allowing it to decode two binary input lines (A, B) into four mutually exclusive outputs (Y0 to Y3) for each decoder.
• CMOS Technology: Utilizing CMOS technology, the IC offers low power consumption and high noise immunity, making it suitable for a wide range of digital applications.
• Enable Input: Each decoder features a low-active enable input (G). When the enable input is high, all outputs are forced high, disabling the decoder. This input can also be used as a data input for demultiplexer applications.
• Wide Operating Voltage Range: The SN74HC139N operates over a wide supply voltage range of 2V to 6V, providing compatibility with various digital systems.
• Fast Propagation Delay: With fast propagation delays, the IC ensures rapid signal processing and low latency in digital circuits.
• Package Options: Available in a PDIP-16 package, the SN74HC139N is easy to integrate into circuits and offers reliable performance.

Applications:

• Memory Decoding: The SN74HC139N 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.
• Multiplexer/Demultiplexer Applications: The enable input can be used to switch between different data lines in demultiplexer applications, or to select specific inputs in multiplexer configurations.

Specifications:

• Supply Voltage (VCC): 2V to 6V
• Propagation Delay: Typical values depend on the supply voltage and load capacitance, but are generally in the range of tens of nanoseconds.
• Output Current (IOH/IOL): ±20 mA (maximum)
• Operating Temperature Range: -40°C to +85°C

In summary, the SN74HC139N is a versatile and high-performance dual 2-to-4 line decoder/demultiplexer suitable for a wide range of digital applications. Its CMOS technology, wide operating voltage range, and fast propagation delay make it an ideal choice for memory decoding, data routing, and multiplexer/demultiplexer applications.