The KS74HCTLS138N is a 3-to-8 line decoder/demultiplexer manufactured by Samsung. This device accepts three binary weighted address inputs (A0, A1, A2) and, depending on the input, activates one of the eight outputs (Y0-Y7). The device features three enable inputs (E1, E2, E3) which must be in the correct logic state for the device to function. This makes the device highly versatile for memory decoding and data routing applications.

Applications

• Memory address decoding
• Data routing
• Logic function generation
• Demultiplexing applications
• Peripheral selection

Features

• Low power consumption
• TTL input compatibility
• High noise immunity
• 3 enable inputs to simplify cascading
• Eight outputs

Benefits

• Simplifies memory addressing schemes
• Efficient data routing
• Reduced component count through function generation
• Flexibility through cascading multiple decoders
• Improved system reliability due to high noise immunity

Additional Details

The KS74HCTLS138N provides eight mutually exclusive active-low outputs. The device operates with a supply voltage of 4.5V to 5.5V and is available in a 16-pin DIP package. The three enable inputs allow for easy cascading of multiple decoders to expand the number of decoded outputs. The device is designed to be pin-compatible with standard 74LS138 and 74HCT138 devices, offering flexibility in system design. It's suitable for various digital logic applications requiring address decoding or data selection. Its improved performance characteristics, including lower power consumption and higher speed compared to older TTL families, make it a preferred choice in modern digital systems. The HCTLS logic family provides TTL-compatible input thresholds with CMOS power consumption levels.