SP3232EBER-L/TR

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SP3232EBER-L/TR Application Field and Working Principle

The SP3232EBER-L/TR is a 3.3V, RS-232 transceiver circuit that provides a full-duplex, asynchronous serial data link interface with low energy consumption and exceptional noise immunity. The transceiver enables RS-232 data transmission over cabling up to 50ft in length.

Key Features

• Comes in 8-pin PDIP, SOIC and TSSOP packages
• Power supply voltage of 3.0 to 3.6V
• Operating data rate up to 250Kbps
• Meets or exceeds EIA/TIA-232 and ITU V.28 specifications
• High immunity of ±15KV ESD protection on all I/O pins
• Thermal shutdown protection
• Low quiescent power, 0.0017mA

Applications

The SP3232EBER-L/TR transceiver offers a combination of features which make it suitable for many cost-sensitive and power-sensitive applications. These applications include automotive and industrial control systems, medical instruments and test equipments, low power embedded systems, point of sale and handheld terminals. It can also be used in high-speed point-to-point and multi-drop systems.

Working Principle

The SP3232EBER-L/TR is a differential line driver and receiver with low-power shutdown mode. It transmits and receives data using RS-232 logic levels (±10V) and, with the aid of an external transformer, enables operation on balanced interface circuits. The transceiver features a high level of noise immunity and excellent bit error rate performance.

The device contains two power switches as well as two operational amplifiers. The operational amplifiers buffer the input and output, and are used to translate the RS-232 voltage levels to the appropriate CMOS levels. The power switches control the supply voltage, and enable the device to enter a low power state during the inactive time of data transmission.

The device transmits data over cables up to 50ft in length and supports data rates of up to 250Kbps. The transceiver consists of two functional sections: a receiver and a driver. The receiver section receives and translates the differential input signals from the transmitter, while the driver section generates and transmits differential signals to the receiver.

Conclusion

The SP3232EBER-L/TR transceiver is an efficient 3.3V RS-232 interface circuit that provides a full-duplex, asynchronous serial data link. It is designed to meet or exceed EIA/TIA-232 and ITU V.28 specifications. The device’s low power consumption, excellent noise immunity and support for long cable lengths make it suitable for automotive and industrial control systems, medical instruments, test equipment and other cost-sensitive, power-sensitive embedded systems.

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