74VCX162240MTD

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Logic - Buffers, Drivers, Receivers, Transceivers

The 74VCX162240MTD is a three-state octal buffer and line driver with 5V tolerant input. This device is ideal for high-performance and wide system bus applications. By engaging the enable signal, the 74VCX162240MTD can be applied either in parallel or in series. It is suitable for both asynchronous and synchronous applications. The open-drain outputs are designed to provide low on-state resistance to ensure minimal signal distortion. This device is available in the standard TSSOP-20 package.

Application Field:

Due to its high performance and wide system bus applications, the 74VCX162240MTD is primarily designed for connection to and buffering of data bus lines in portable products, such as mobile phones and tablet PCs, as well as in hard disk and CD/DVD drive, with demanding power endurance capability. This product is also suitable for applications in automotive electronics. In addition, the 74VCX162240MTD can be used in local, high-speed and wide system bus applications, such as multiplexers and demultiplexers, and parallel or serial I/O ports of computers.

Working Principle:

As all 3-state buffers, the 74VCX162240MTD acts as precisely-controlled switches and transmits signals from the data bus lines to the output buffers. The device provides an enable signal (EN) which controls the buffer’s switching. In the enabled state, it passes the data signals without any distortion. When the enable signal is inactive, the device does not drive the outputs. As an open-drain device, the 74VCX162240MTD is able to drive the low state to other gates.

The buffer has 8 bit wide data bus lines, controlled by a single enable signal. This allows the synchronous operation of 8 bits of data. The 74VCX162240MTD is a 5V tolerant input buffer, able to accept a 5V input signal and not be damaged, even if it is operating in a 3.3V device. The five-volt tolerant inputs also reduce power consumption as it does not require a discrete level shifter, eliminating extra components and reducing space on the board.

The device has a single output enable (OE) control which generates the output enable signal for the eight buffers. This output enable signal is active low which allows the device to gate the output of the device. As a result, when the output enable signal is logic 0, the outputs of the device are very high impedance and are in the high-impedance state, and when logic one, the outputs are driven as dictated by the data and clock signals.

Conclusion:

The 74VCX162240MTD is an excellent device for high-performance and wide system bus applications. This device provides low on-state resistance and 5V tolerant inputs, ensuring minimal signal distortion. It is highly applicable to portable products, automotive electronics, disk drive and system bus applications. Furthermore, its powerful OE control allows for synchronous transmission of 8 bit wide data without distortion.

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