74VHCT138AMTC

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

74VHCT138AMTC is a high-speed CMOS logic device from Texas Instruments. This device is designed to serve as a decoder/multiplexer with 3-bit address and eight outputs. It is suitable for address range decoding and multiplexing applications, and is offered in order to meet the requirements of various applications. The device operates on a voltage range between 2.7 V and 5.5 V and features low power consumption with up to 7 mA output current. It is also RoHS and JESD-17 compliant.

The 74VHCT138AMTC helps reduce power consumption while providing power-up protection and low-power-mode functions. It also helps to speed up data sorting, transfer rates, and memory searches. It is highly flexible, easy to use and customizable. In addition, the device features a wide range of features and high levels of performance and accuracy. Moreover, the device offers a high noise immunity and is able to work reliably for high-speed switching applications.

Application Field of 74VHCT138AMTC

The primary application field of the 74VHCT138AMTC is in address range decoding/multiplexing. It has been designed for applications such as memory rotational and banked address remapping, intelligent I/O, and multiplexer/demultiplexer applications. Other applications include programmable logic controllers (PLCs), serial input/outputs (SIOs), industrial automation, automotive and telecommunication applications, and any other application requiring address decoding and multiplexing capabilities.

Working Principle of 74VHCT138AMTC

The working principle of the 74VHCT138AMTC is based on its ability to decode, multiplex, and route input signals to the designated outputs. The device features three dedicated address inputs (A0, A1, and A2), eight data inputs (D0–D7), and eight dedicated data outputs (Q0–Q7). The device takes the inputs and then converts them into an 8-bit composite output depending on the values present on the address inputs.

When the device is enabled, it uses the address inputs to determine which output will receive the data inputs. If for example, A0 and A1 were set to “Low” and A2 was set to “High” then D0 will be sent to Q2 and the remaining data inputs will remain unaffected. If A0 and A1 were set to “High” and A2 was set to “Low” then D0–D7 would all be sent to their respective outputs.

The 74VHCT138AMTC also features open-collector output stages, which allows each output to be connected to ground via an external pull-down resistor. This helps to save power when the outputs are not in use and can be used to control current-limiting resistors and circuit protection elements if desired. The device has low static power dissipation, providing a wide operating temperature range of 0°C to 70°C and a power rating of 2.7 V to 5.5 V.

Conclusion

The 74VHCT138AMTC is a highly flexible device suitable for address range decoding and multiplexing applications. It features three address inputs and eight data outputs, allowing the creation of an 8-bit composite output depending on the address inputs. In addition, it features low power consumption, an extended temperature range, and open-collector output stages with external pull-down resistor support. Finally, it is RoHS and JESD-17 compliant.

The specific data is subject to PDF, and the above content is for reference