Texas Instruments

SN74LS139ADR

The SN74LS139ADR is a high-speed Si-gate CMOS device from Texas Instruments. It is a 1-of-16 line decoder/demultiplexer that provides high-speed operation with low power consumption. The device is available in a 16-pin small-outline integrated circuit (SOIC) package.

Description:

The SN74LS139ADR is a member of the 74LS series of CMOS logic devices. It is a 1-of-16 line decoder/demultiplexer that allows one input signal to control the selection of one of 16 output lines. The device has three address input lines (A0, A1, and A2) that determine which output line is active. The remaining output lines are inactive.

Features:

1. High-speed operation: The SN74LS139ADR provides high-speed operation with a propagation delay of 8 ns (typical) and a transition time of 5 ns (typical).
2. Low power consumption: The device has a low power consumption of 320 mW (typical) at a supply voltage of 5 V.
3. Active-low enable input: The enable input (G) is active-low, which means that the device is enabled when the enable input is low.
4. Active-high output: The output is active-high, which means that the output is high when the corresponding input is active.
5. Three-state outputs: The device has three-state outputs, which means that the outputs can be placed in a high-impedance state when not in use.

Applications:

The SN74LS139ADR has a wide range of applications, including:

1. Digital multiplexing: The device can be used to multiplex digital signals, allowing multiple digital signals to be transmitted over a single communication line.
2. Digital decoding: The device can be used to decode digital signals, allowing a single input signal to control one of 16 output lines.
3. Address decoding: The device can be used for address decoding in memory and I/O systems.
4. Display control: The device can be used to control the selection of segments in a multiplexed LED or LCD display.
5. Signal routing: The device can be used to route signals in complex digital systems.

In summary, the SN74LS139ADR is a high-speed, low-power 1-of-16 line decoder/demultiplexer from Texas Instruments that offers a wide range of applications in digital systems. Its features include high-speed operation, low power consumption, active-low enable input, active-high output, and three-state outputs.