74VCXH245WM

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74VCXH245WM is a level translator chip produced by Fairchild, which is used to achieve the communication between two different voltage levels. It consists of 8 bidirectional channels, with the SOP package type, which is featured with the low-power and low-voltage operations. 74VCxH245WM provides 8-bit non-inverting buffers to link port A and port B for the data exchange, and the receiver A, receiver B, and the built-in level pull-up resistors are used in the open-drain or open collector output configuration. The 74VCXH245WM device is an indispensable logic device for logic-level conversions, and below is an overview of the application field and working principle of this device.

Application Field

74VCXH245WM has a wide range of applications. Generally speaking, it can be used in almost any system and device that requires level conversion between two different voltage levels, in order to simplify the designs and reduce inadvertently damaging, such as data transmission and signal output. Furthermore, the level shift feature, low power dissipation, and high input-to-output isolation guarantee that it can operate efficiently in various operation conditions, such as automotive applications, interface connections between two logics, odd/even-number logic level transfers, etc.

Working Principle

The working principle of 74VCXH245WM can be summarized as below:

• At the input port, 8 channels on the 74VCXH245WM can provide 8-bit bidirectional data transmission. The input logic voltage level can be set based on the minimum voltage range of 0.65V to 1.7V. Meanwhile, the receiver A, receiver B device can be configured to the open-drain or open-collectable output configuration.
• At the output port, the built-in level pull-up resistors are used to pull the logic high level up to VCCA voltage level, and the enable A, enable B pins are used to control the level conversion operations. When enable A=high and enable B=low, the data transmission between the two ports will be enabled.
• After the data transmission between port A and port B is enabled, the 8 channels on the 74VCXH245WM can complete the level conversion operations from low to high or vice versa, and the data will be transmitted from port A to port B or vice versa.

Conclusion

74VCxH245WM is an effective device to provide level conversion and data transmission between two different voltage signals or ports. It is widely used in various system designs and provides an indispensable logic support for level shift applications.

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