SN74LV245AGQNR

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Logic-buffers, drivers, receivers, and transceivers have been integral in helping engineers design an ever-increasing number of sophisticated circuit applications. Encompassing a variety of communication technologies, these devices have become the backbone of most digital electronics and embedded systems. This article will provide an overview of one such device, the SN74LV245AGQNR, and explore its application field and working principle.

SN74LV245AGQNR Overview

The SN74LV245AGQNR is an octal bus transceiver with non-inverting 3-state outputs. The device is an octal transceiver and switch with two independent switches and two independent buses. It allows for data transmission bidirectionally between two buses, and offers two channels of bus-to-bus communication, with each channel accommodating up to 8 bits of data.

The SN74LV245AGQNR offers several features and benefits, including:

• Low power consumption and low voltage operation, with a logic threshold that is VCC-independent.
• Schmitt-trigger action on the all inputs, allowing for noise-suppression and improved noise immunity.
• High immunity to electromagnetic interference.
• Low propagation delay time.
• High-speed digial outputs, with open-drain 3-state outputs, to reduce power and heat dissipation.

The SN74LV245AGQNR is available in several package options, including a 20-pin DIP and a 24-pin SOIC.

Application Field

The SN74LV245AGQNR can be used in a variety of logic and communication applications. As a bus transceiver, the device allows for data transmission bidirectionally between two buses, and offers two channels of bus-to-bus communication.

The device is typically used in embedded systems and digital devices requiring bus-to-bus communication. It can also be used to convert between logic levels, allowing for communication between devices operating on different voltage levels.

The SN74LV245AGQNR has a wide range of application fields, including digital AV systems, auto electronics, communications systems, and industrial automation systems.

Working Principle

The SN74LV245AGQNR operates by connecting two channels of bus-to-bus communication via two independent, bidirectional transceivers. The two transceivers are enabled by a pair of enable/disable inputs, which are respectively mapped as EN1 and EN2, and each of the two transceivers accommodates up to 8 bits of data.

The SN74LV245AGQNR also includes two tri-state mode enable input pins, EN3A and EN3B. When the inputs are active (that is, the EN3A and EN3B pins are high), both output channels are in tri-state mode. This allows for an easy way to disable the device, which can be beneficial in applications where multiple devices are present and sharing the same bus.

The device operates on 5V-3V logic levels, and its logic threshold is VCC-independent. This allows for a wide range of voltage compatibility. The SN74LV245AGQNR also features Schmitt-trigger action on the inputs, allowing for improved noise immunity and enhanced performance in noise-sensitive applications.

Conclusion

The SN74LV245AGQNR is a versatile device that can be used in a wide range of logic and communication applications. It allows for data transmission bidirectionally between two buses, and offers two channels of bus-to-bus communication, with each channel accommodating up to 8 bits of data. The device operates on 5V-3V logic levels, and its logic threshold is VCC-independent. Typical application fields include digital AV systems, auto electronics, communications systems, and industrial automation systems.

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