MC74VHC245DW

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The MC74VHC245DW is a CMOS logic, part of the 74VHC245 family, that is a range of octal transceivers with 3-state non-inverting outputs. This device is ideal for many applications such as interfacing to asynchronous microprocessor buses, bridges between levels of bus, and signal isolation. It is available in 8-pin PDIP and SOIC package options.

The MC74VHC245DW is often a useful choice when it comes to logic-level interfacing for high-speed communication. Its configurable direction control, 3-state non-inverting outputs, and power management make it an excellent choice for applications such as multimedia transmission and local area network (LAN) bridging which demand fast data speeds. This device provides a low-power solution which is ideal for industrial or communications applications.

Application Field

As a key product in the 74VHC245 series, the MC74VHC245DW operates over the full military temperature range of -55°C to +125°C. It has a wide voltage range with multiple ranges of 6V to 15V and 2V to 6.5V operating voltages.

It provides bidirectional buffer bus interface for multiple types of data, such as serial, parallel, and address buses, making it ideal for low-cost, high-performance applications. The device combines bidirectional buffers, latch, and tri-state output components to aid in logic level conversion. It also supports EIA/TIA-561-A/-612-A standards which define bidirectional logic level communications.

The octal buffer/line driver is typically used in applications such as data separator, USB data bus, industrial control systems, motor control, LAN systems, and other communication applications to provide bidirectional level shifting for data conversion and isolation.

Working Principle

The MC74VHC245DW is an octal transceiver that consists of an octal buffer, a latch, and two octal 3-state non-inverting buffers. It is a non-inverting transceiver that is ideal for level shifting and signal isolation applications. Its two I/O channels make it a great choice for systems that require high data rates and high performance.

The device can be configured to interpret either high/low or low/high level signals as input or output signals. The direction of data flow is set using the direction control pins, which can be held high or low. When the direction control pin is held high, the data will flow from the A channel to the B channel. When the direction control pin is held low, data will flow in the opposite direction, from the B channel to the A channel.

The 3-state outputs of the device allow it to easily interface with other system components. When the output is in the enabled state, the data is available to other components. When the output is in the disabled state, the connected components are unaffected, preventing the possibility of incorrect data being input to the connected device.

The MC74VHC245DW also includes low-power shutdown modes, allowing the device to be operated at lower power levels than standard devices. This is beneficial for applications that require low power but still require a fast data rate.

The MC74VHC245DW also includes differential input sensing and latch capabilities which allow the device to detect and store a logic level change on one of its two input channels, allowing it to act as a buffer or line-level shift. This functionality is invaluable in applications with multiple logic level signals, and eliminates the need to design complex logic circuits to perform data conversion.

The MC74VHC245DW is an efficient and widely-used part of the 74VHC245 family. Its high speed and low power capabilities, combined with its configurable direction control, 3-state non-inverting outputs, and low-power shutdown modes make it an excellent choice for many applications, such as parallel and serial bus communications, motor control, and industrial control systems.

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