STMicroelectronics L6364 transceiver

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STMicroelectronics is bringing flexibility to IO-Link connections with the L6364 transceiver, which features dual communication channels that allow configurable output doubling for extra drive strength, in addition to a DC/DC converter and dual-mode UART.

The product supports IO-Link at COM2 (38.4 kbaud) and COM3 (230.4 kbaud) modes, as well as standard single-input/output (SIO) communication. The dual outputs, comprising an IO-Link CQ pin and standard DIO pin, each have surge-pulse and reverse-polarity protection. The maximum drive strength is programmable up to 250 mA and the two channels can be paralleled to supply up to 500 mA.

An SPI port connects the transceiver to the host microcontroller (MCU), with an additional interrupt pin for diagnostic reporting. Sensor data can be exchanged with the MCU through the UART or by using single- or multi-byte (SPI) modes. The integrated UART, which supports IO-Link message sequencing (M-Sequencing), can be programmed to operate in IO-Link or standard SIO mode and allows unlimited M-Sequence size in single-octet IO-Link. An internal data buffer supports up to 15 octets.

In normal operation the product is configured by the MCU via the SPI interface at start-up. It starts operating in SIO-device mode, driving the output lines as configured by the MCU. If the device is connected to an IO-Link master, the master can initiate IO-Link communication by a wake-up request.

The highly integrated transceiver contains a DC/DC buck converter with programmable output voltage. There are also 3.3 and 5 V low-dropout regulators (LDOs) with 50 mA output current. The LDOs can be powered from the external supply voltage or from the DC/DC converter, and are connected to external pins to supply the MCU and sensors.

The product design emphasises flexibility and ease of use, including a wide operating-voltage range from 5 to 35 V. There are also flexible protection features, with configurable thresholds for thermal-shutdown, UVLO (undervoltage lockout), and undervoltage, overvoltage and overload detection. Short-circuit, ground and Vcc disconnection are also provided. In addition, the transceiver reports extended diagnostics to the MCU through the Interrupt pin.

For more information: www.st.com/l6364-pr.