74VHCT245AMTC

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74VHCT245AMTC, also known as “dual data lines” or “T245AMTC” is an integrated circuit (IC) developed by Texas Instruments (TI). It is a part of the 74VHCT245AMTC family of logic devices that are designed for a wide range of applications. The 74VHCT245AMTC includes two 8-bit channels that provide signal buffering and provide a low-skew signal across two data lines. It is used for a variety of applications including signal buffering for low-skew transmission, bus driving, circuit protection, signal conditioning, signal routing, and line driving.

Applications

The 74VHCT245AMTC is commonly used as a signal buffer to drive or receive signals across two data lines. It is used in applications like driving address and data busses, low-power LED display driving, controlling peripheral devices, and providing signal isolation and protection in isolated systems.

The device is also used in low-voltage logic systems, low-voltage control circuits and low speed signals. It is often used in embedded systems and automotive applications, such as controlling access port modules, driving serial communication buses, and driving electronic components for instrument clusters.

Due to its low power dissipation and wide supply voltage range, the device is also used as a signal level converter in many microprocessor-based systems.

Working Principle

The 74VHCT245AMTC is an 8-bit logic device that operates in a single supply voltage range from 3.0V to 5.5V. It is an output buffer that drives two open-drain data lines, providing low-skew output signals in either direction.

The device uses complimentary-symmetry push-pull outputs that both source and sink current depending on the logic state of the input signals. The device is designed to sink current on one side of the data line and source current on the other. This allows for low-skew bidirectional data transmission.

The device also contains two sets of 8-bit latched inputs that allow it to be used as a memory device. The latched inputs can store a set of data and outputs can be set both high or low. This makes the device useful as a signal buffer in low-power systems where the data rate is relatively low.

The device also features an active power-on reset that ensures that both buffers are reset to a known state when powered up. This feature ensures that the device can be used in robust, low-power systems. It also has an open-drain Schmitt trigger input to help reduce noise.

Conclusion

The TI 74VHCT245AMTC part is a dual data line buffer with 8-bit latched inputs and active power-on reset. It is most commonly used as a signal buffer in low-skew transmission applications, low-power LED display driving, and low-voltage logic systems. Additionally, due to its low power dissipation and wide supply voltage range, it is also used as a signal level converter in many microprocessor-based systems.

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