SP339E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION FEBRUARY 2018 REV. 1.0.5 FEATURES GENERAL DESCRIPTION Pin selectable Cable Termination The SP339 is an advanced multiprotocol transceiver supporting RS-232, RS-485, and RS-422 serial No external resistors required for RS-485/422 standards in a 40 pin QFN package. Integrated cable termination and biasing termination and four configuration modes allow all 3.3V or 5V Single Supply Operation three protocols to be used interchangeably over a single cable or connector with no additional switching Robust ESD Protection on bus pins components. Full operation requires only four 15kV IEC 61000-4-2 (Air Gap) external charge pump capacitors. 8kV IEC 61000-4-2 (Contact) The RS-485/422 modes feature one driver and one 15kV Human Body Model (HBM) receiver (1TX/1RX) in both half and full duplex configurations. The RS-232 mode (3TX/5RX) Max Data Rate of 20Mbps in RS-485/422 Modes provides full support of all eight signals commonly and up to 1Mbps in RS-232 Modes used with the DB9 RS-232 connector. A dedicated Pin selectable 250kbps Slew Limiting diagnostic loopback mode is also provided. 3 Drivers, 5 Receivers RS-232/V.28 The high speed drivers operate up to 20Mbps in RS- 485/422 modes, and up to 1Mbps in RS-232 mode. 1 Driver, 1 Receiver RS-485/422 All drivers can be slew limited to 250kbps in any Full and Half Duplex Configuration mode to minimize electromagnetic interference (EMI). 1/8th Unit Load, up to 256 receivers on bus All transmitter outputs and receiver inputs feature RS-485/422 Enhanced Failsafe for open, shorted, robust electrostatic discharge (ESD) protection to or terminated but idle inputs 15kV IEC-61000-4-2 Air Gap, 8kV IEC-61000-4-2 Contact, and 15kV Human Body Model (HBM). Space saving 6mm x 6mm QFN-40 Package Each receiver output has full fail-safe protection to Pin compatible with SP338E avoid system lockup, oscillation, or indeterminate states by defaulting to logic-high output level when the inputs are open, shorted, or terminated but TYPICAL APPLICATIONS undriven. No external biasing resistors are required. Dual Protocol Serial Ports (RS-232 or RS-485/422) The RS-232 receiver inputs include a 5k pull-down to ground. The RS-485/422 receiver inputs are high Industrial Computers impedance (>96k when termination is disabled), Industrial and Process Control Equipment allowing up to 256 devices on a single communication bus (1/8th unit load). Point-Of-Sale Equipment The SP339 operates from a single power supply, Networking Equipment either 3.3V or 5V, with low idle current (2mA typical in HVAC Controls Equipment all modes). The shutdown mode consumes less than 10A for low power standby operation. Building Security and Automation Equipment (1) ORDERING INFORMATION PART NUMBER OPERATING TEMPERATURE RANGE LEAD-FREE PACKAGE PACKAGING METHOD SP339EER1-L -40C to +85C 40-pin QFN Tray (2) SP339EER1-L/TR -40C to +85C 40-pin QFN Tape and Reel Yes SP339ECR1-L 0C to +70C 40-pin QFN Tray NOTE: 1. Refer to www.exar.com/SP339E for most up-to-date Ordering Information. 2. Visit www.exar.com for additional information on Environmental Rating. 1 SP339E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0.5 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections to the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device. Supply Voltage V -0.3V to +6.0V CC Receiver Input Voltage (from Ground) 18V Driver Output Voltage (from Ground) 18V Short Circuit Duration, TX out to Ground Continuous -0.3V to (V + 0.5V) Voltage at TTL Input Pins CC Storage Temperature Range -65C to +150C Lead Temperature (soldering, 10s) +300C Power Dissipation 40-pin QFN 500mW (derate 17mW/C above +70C) ESD Ratings HBM - Human Body Model (Tx Output & Rx Input pins, R1-R9) 15kV HBM - Human Body Model (All other pins) 4kV IEC 61000-4-2 Airgap Discharge (Tx Output & Rx Input pins, R1-R9) 15kV IEC 61000-4-2 Contact Discharge (Tx Output & Rx Input pins, R1-R9) 8kV CAUTION: ESD (ElectroStatic Discharge) sensitive device. Permanent damage may occur on unconnected devices subject to high energy electrostatic fields. Unused devices must be stored in conductive foam or shunts. Personnel should be properly grounded prior to handling this device. The protective foam should be discharged to the destination socket before devices are removed. 2