SP485EEP-L

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SP485EEP-L

SP485EEP-L is an IC (integrated circuit) designed to help engineers and designers interface with multiple communication protocols from a single IC. It is a highly integrated multi-protocol serial interface transceiver specifically designed for half-duplex communication for RS-485, EIA530-A/B and EIA/TIA-232E/F standards.

The SP485EEP-L is a multi-functional, 4-wire, RS-485 transceiver. Its features include a 400ns minimum rise and fall time, symmetrical drivers, operation from 3V to 5.25V, selectable slew rate limiting feature, disabled transmitter output, data rates up to 1Mbps, and a low power shutdown mode. The SP485EEP-L also has an on-chip power-on reset generator, additional logic to simplify the use of external components, and a low power consumption of 500μA per driver in full operation.

Application Field

The SP485EEP-L is ideal for use in industrial, commercial and home automation systems, including point-of-sale systems. It is also used in building automation and security systems, remote control systems, lighting, audio and video applications, power management, and other high performance communication systems requiring robust ESD protection.

The SP485EEP-L is also applicable for applications where an interface between two devices is required, such as a local-area-network, robotics, and instrument serial interfaces.

Working Principle

The SP485EEP-L incorporates an advanced delay-balance receiver design and an ESD Protection Circuitry to ensure high-speed, robust transmission of data over long distance RS-485 communications lines. The delay-balance receiver ensures that all received data is properly received and decoded. The ESD protection circuitry provides highly reliable ESD protection against both static electric fields and pulse disturbances with a ±15kV air-gap discharge immunity.

The SP485EEP-L is capable of driving cable lengths up to 1000 meters while providing ±15kV ESD immunity. A slew rate-limited driver is available to reduce ringing on the line and further improve ESD performance while supporting data rates up to 1Mbps. This feature allows the SP485EEP-L to drive long cables, up to 1000 meters, while ensuring error-free operation.

The SP485EEP-L can work in half-duplex modes and for transmission of data, the short-circuit input and output enable signals (SDE and SDO) must be enabled to ensure that data is transmitted. The SDE and SDO signals enable transmission when the device is in idle mode and, when disabled, can enable reception of incoming data from another device.

Conclusion

The SP485EEP-L is a highly integrated multi-protocol serial interface transceiver specifically designed for half-duplex communication for RS-485, EIA530-A/B and EIA/TIA-232E/F standards. It is an ideal IC for medium-range, low power communications and can be used in a variety of applications, including industrial, commercial and home automation systems, robotics, instrument serial interfaces, and local area networks.

The SP485EEP-L is able to provide robust ESD protection and data transmission up to 1000 meters while supporting data rates up to 1Mbps. This makes it a great choice for efficient and reliable communication interfaces in a wide range of applications.

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