SN65HVD77DGK

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The SN65HVD77DGK is a 3-V to 5.5-V difference line transceiver. It provides differential transmit capability to systems in need of improved noise immunity and improved data rate when compared to simpler single-ended transmitters. The SN65HVD77DGK is designed for half-duplex communication and is suitable for balanced bus communication transmission over CAT5 cables. The differential signal driven to the transmitter inputs is internally converted to a differential signal for transmission on the bus.

The SN65HVD77DGK is a receiver-transmitter line transceiver. This device features an input to the differential receiver that includes voltage and current sensing to detect signal receive and loss of signal (LOS) conditions. The differential signal is amplified, inverted and presented to a shape detection circuit. Additionally, the transceiver includes an open-collector alarm output (ALM) which can be used to indicate LOS and configuration errors.

The SN65HVD77DGK also includes special features to increase the immunity of the transceiver to external electromagnetic interference. It has differential inputs and outputs, allowing it to reject common mode noise coming from external sources and reduce the effects of ground loop voltages. The transmitter input circuitry includes slew rate limiting and input impedance limiting, which help to prevent the transceiver from emitting spurious emissions.

The transceiver is designed to work over relatively short distances, such as between adjacent equipment in the same shelf or rack. It supports data rates up to 250 Kbps and operates with a supply voltage ranging from 3 V to 5.5 V. The transceiver can be also be used in multipoint applications with up to 64 nodes, providing a cost-effective solution for balanced bus communication.

The SN65HVD77DGK can be used in a variety of applications, ranging from communication over CAT5 cables to AS-Interface and Event-Digital bus systems. In addition, it is suitable for various industrial automation protocols, such as CANopen and CAN-Bus. This transceiver also supports BR-Bus, synRECO, Process Digital Interface and Resolverbus, making it a great choice for most system and field bus applications.

The SN65HVD77DGK is designed to be powered by a single 3 V to 5.5 V supply and can be used in unipolar or bipolar operation. It uses on-chip integrated drivers and receivers that provide differential signal transmission and reception, creating a highly reliable communication link.

The operation of the SN65HVD77DGK is based on a single loop, differential signal line. The differential input is amplified and then presented to the shape detection comparator that decides if the input signal is a valid signal. The data is then passed to the receiver output. The output signal of the receiver is then presented to the transmitter input, where it is inverted and amplified before it is sent out over the differential output line.

The features of the SN65HVD77DGK make it an ideal choice for a variety of industrial applications. It provides high noise immunity, low power consumption and speedy data transfer, making it an ideal choice for applications such as communication over CAT5 cables and various industrial automation protocols.

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