The KS74HCTLS139N is a dual 2-to-4 line decoder/demultiplexer manufactured by Samsung. This device contains two independent decoders, each accepting two binary weighted address inputs (A0, A1) and enabling one of the four outputs (Y0-Y3) based on the input combination. Each decoder also has an enable input (E) which must be low for the decoder to function. This configuration allows for versatile applications in memory decoding, data routing, and control logic.

Applications

• Memory chip selection
• Address decoding
• Data routing and distribution
• Peripheral selection
• Control signal generation

Features

• Dual 2-to-4 line decoders in a single package
• Low power consumption
• TTL input compatibility
• Enable input for each decoder
• Active-low outputs

Benefits

• Increased board density by integrating two decoders in one package
• Simplified memory addressing schemes
• Efficient data routing
• Flexible control through enable inputs
• Reduced component count

Additional Details

The KS74HCTLS139N features active-low outputs, meaning that the selected output is low while all other outputs are high. The device operates with a supply voltage of 4.5V to 5.5V and is available in a 16-pin DIP package. Each decoder section functions independently, allowing for simultaneous decoding of two separate address spaces or data streams. Its TTL-compatible inputs and low power consumption make it suitable for integration with a wide range of digital systems. The device's pinout and functionality are compatible with standard 74LS139 and 74HCT139 devices. It is a reliable and versatile component for implementing decoding and demultiplexing functions in various digital circuits. The HCTLS logic family provides TTL-compatible input thresholds with CMOS power consumption levels.