SP335E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION August 2017 Rev. 1.0.2 FEATURES GENERAL DESCRIPTION Pin-Selectable Cable Termination The SP335 is an advanced multiprotocol transceiver supporting RS-232, RS-485, and RS-422 serial No External Resistors Required for RS-485/422 standards. Integrated cable termination and multiple Termination or Biasing configuration modes allow all three protocols to be Robust ESD Protection: used interchangeably over a single cable or connector with no additional switching components. 15kV IEC 61000-4-2 Air Gap Discharge Full operation requires only four external charge 8kV IEC 61000-4-2 Contact Discharge pump capacitors. 15kV Human Body Model (HBM) The RS-485/RS-232 mode pin selects RS-485 mode 20Mbps RS-485 and 1Mbps RS-232 Data Rates when high, and RS-232 mode when low. In RS-485 mode, the TERM pin enables the differential 120 Pin-Selectable 250kbps Slew Limiting termination, and the HALF/FULL pin configures the Single Supply Operation from 3V to 5.5V transceiver as either half or full duplex. 1.65V to 5.5V Logic Interface V pin L The high speed drivers operate up to 20Mbps in RS- 485/422 modes, and up to 1Mbps in RS-232 mode. 2 Drivers, 2 Receivers RS-232/V.28 All drivers can be slew limited to 250kbps in any 1 Driver, 1 Receiver RS-485/422 mode to minimize electromagnetic interference (EMI) by setting the dedicated SLEW pin low. Full or Half Duplex Configuration 1/8th Unit Load, up to 256 receivers on bus All transmitter outputs and receiver inputs feature robust electrostatic discharge (ESD) protection to RS-485/422 Enhanced Receiver Fail-safe for open, 15kV IEC 61000-4-2 Airgap, 15kV Human Body shorted, or terminated but idle inputs Model (HBM) and 8kV IEC 61000-4-2 Contact. Each 10nA Shutdown Supply Current (typical) receiver output has full fail-safe protection to avoid system lockup, oscillation, or indeterminate states by Small 32 QFN package (5mm x 5mm) defaulting to logic-high output level when the inputs are open, shorted, or terminated but undriven. No TYPICAL APPLICATIONS external biasing resistors are required. The RS-232 receiver inputs include a 5k pull-down Software Programmable Serial Ports to ground when in RS-232 mode. The RS-485/422 (RS-232, RS-422, RS-485) receiver inputs are high impedance (>96k when Industrial and Single Board Computers termination is disabled), allowing up to 256 devices on a single communication bus (1/8th unit load). Industrial and Process Control Equipment The SP335 operates from a single power supply, Point-Of-Sale Equipment either 3.3V or 5V, with low idle current. The shutdown HVAC Controls and Networking Equipment mode consumes less than 1A in low power standby operation with RS-232 receivers enabled. Building Security and Automation (1) ORDERING INFORMATION PART NUMBER OPERATING TEMPERATURE RANGE LEAD-FREE PACKAGE PACKAGE METHOD SP335EER1-L Tray -40C to +85C SP335EER1-L/TR Reel (2) 32-pin QFN Yes SP335ECR1-L Tray 0C to +70C SP335ECR1-L/TR Reel SP335EER1-0A-EB SP335E Evaluation Board NOTES: 1. Refer to www.exar.com/SP335E for most up-to-date Ordering Information 2. Visit www.exar.com for additional information on Environmental Rating 1 SP335E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0.2 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 Logic Interface Voltage V V V L L CC Voltage at TTL Input Pins -0.3V to 6.0V Receiver Input Voltage (from Ground) 18V Driver Output Voltage (from Ground) 18V Short Circuit Duration, TX out to Ground Continuous Storage Temperature Range -65C to 150C Lead Temperature (soldering, 10s) 300C Maximum Operating Junction Temperature, T 125C J Power Dissipation 32-pin 5x5 QFN 1400mW (derate 26.0mW/C above +70C) 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. ESD PROTECTION MIN. TYP. MAX. UNITS 15 kV IEC 61000-4-2 Airgap TX Output & RX Input Pins 8 kV IEC 61000-4-2 Contact 15 kV Human Body Model (HBM) All Other Pins 3 kV Human Body Model (HBM) 2