SP490ECP-L

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SP490ECP-L is a highly flexible and configurable 3.3V low voltage CMOS EIA-485 transceiver, designed to meet the needs of industrial communication systems. It provides maximum protection against discharge and surge currents for transmitting and receiving data over twisted-pair cables by providing integrated line receivers and a differential line driver with a separate diode return path to reduce common-mode interference.

The SP490ECP-L application field includes serial communication systems that utilize RS-485/RS-232 bus signaling protocols such as Modbus, HART, and PROFIBUS DP. It is also employed in industrial systems and SCADA systems, where it is typically found in applications that require low idle power, extended common-mode operation, and excellent EMI immunity.

The SP490ECP-L works in two modes: normal and ultra-low power. In normal mode, it operates as a full-duplex transceiver. It contains two line drivers for transmitting data and two line receivers for receiving data. The line drivers are designed to exceed the requirements of RS-485, resulting in excellent signal quality over long distances with minimal crosstalk. The receivers feature an adjustable hysteresis that helps the transceiver successfully reject interference and noise.

In ultra-low power mode, the transceiver\'s main power supply is turned off, which significantly reduces power consumption. This mode is activated through an enable pin which is used to control the state of the transceiver and can also be used to control the logic level of the bus. This feature is useful when the bus is shared by multiple devices and allows the transceiver to be power cycled separately from the other devices.

The SP490ECP-L also contains a host of features making it suitable for a wide range of applications. These include variable and adjustable rise and fall times for signal switching, adjustable supply voltage, variable bus voltage levels, selectable line drivers, and low current-consumption receivers. It also offers thermal protection to prevent the transceiver from overheating due to prolonged usage and an overtemperature warning signal, making it a safe and reliable choice for applications in harsh industrial environments.

In summary, the SP490ECP-L is an extremely capable and versatile transceiver suitable for a wide range of applications. It offers excellent signal quality over long distances, low idle power consumption, extended common-mode operation, excellent EMI immunity, and various features to ensure reliable operation in harsh industrial environments.

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