MAX3140CEI+

MAX3140CEI+ is a complete universal asynchronous receiver-transmitter (UART) and a true fail-safe RS485/RS-422 transceiver combined in a single 28-pin QSOP package for space, cost, and power-constrained applications. This saves additional board space as well as microcontroller (µC) I/O pins by featuring a SPI™/QSPI™/MICROWIRE™-compatible serial interface. It is pin-programmable for configuration in all RS-485/RS-422 networks. The MAX3140 includes a single RS-485/RS-422 driver and receiver featuring true fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This feature provides immunity to faults without requiring complex termination. Applications include industrial-control local area networks, HV AC and building control, point-of-sale devices, transceivers for EMI-sensitive applications, embedded systems, and intelligent instrumentation.

• SPI/MICROWIRE-compatible interface saves µC I/O pins
• True fail-safe receiver output eliminates complex network termination
• Programmable up to 230kbaud with a 3.6864MHz crystal
• 8-word receive FIFO minimizes processor overhead
• 9-bit address-recognition interrupt
• Allows up to 256 transceivers on the bus
• Hardware/software-compatible with MAX3100 and MAX3089
• Supply voltage range from 4.75 to 5.25V
• 28 QSOP package
• 0°C to +70°C temperature range

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