ISL3332, ISL3333 Data Sheet May 27, 2008 FN6362.0 3.3V, 15kV ESD Protected, Two Port, Dual Features Protocol (RS-232/RS-485) Transceivers 15kV (HBM) ESD Protected Bus Pins (RS-232 or RS-485) The ISL3332, ISL3333 are two port interface ICs where each port can be independently configured as a single Operates From a Single 3.3V Supply RS-485/422 transceiver, or as a dual (2 Tx, 2 Rx) RS-232 Two Independent Ports, Each User Selectable for RS-232 transceiver. With both ports set to the same mode, two (2 Transceivers) or RS-485/RS-422 (1 Transceiver) RS-485/RS-422 transceivers, or four RS-232 transceivers are available. True Flow-Through Pinouts Simplify Board Layouts Pb-free (RoHS compliant) If either port is in RS-232 mode, the onboard charge pump generates RS-232 compliant 5V Tx output levels from a Full Failsafe (Open/Short) Rx in RS-485/422 Mode single V supply as low as 3.15V. The transceivers are CC Loopback Mode Facilitates Board Self Test Functions RS-232 compliant, with the Rx inputs handling up to 25V. User Selectable RS-485 Data Rates (ISL3333 Only) In RS-485 mode, the transceivers support both the RS-485 - Fast Speed 20Mbps and RS-422 differential communication standards. The - Slew Rate Limited . 460kbps receivers featurefull failsaf operation, so the Rx outputs - Slew Rate Limited . 115kbps remain in a high state if the inputs are open or shorted together. The transmitters support up to three data rates, two Fast RS-232 Data Rate . Up to 400kbps of which are slew rate limited for problem free RS-232 Tx and Rx Enable Pins (ISL3333 Only) communications. The charge pump disables when both ports are in RS-485 mode, thereby saving power, minimizing Small Charge Pump Caps . 4 x 0.1F noise, and eliminating the charge pump capacitors. Low Current Shutdown Mode .35A Both RS-232 and RS-485 modes feature loopback and QFN Package Saves Board Space (ISL3333 Only) shutdown functions. Loopback internally connects the Tx Logic Supply Pin (V ) Eases Operation in Mixed Supply L outputs to the corresponding Rx input, to facilitate board Systems (ISL3333 Only) level self test implementation. The outputs remain connected to the loads during loopback, so connection problems (e.g., Applications shorted connectors or cables) can be detected. Shutdown Gaming Applications (e.g., Slot Machines) mode disables the Tx and Rx outputs, disables the charge pumps, and places the IC in a low current (35A) mode. Single Board Computers The ISL3333 is a QFN packaged device that includes two Factory Automation additional user selectable, lower speed and edge rate Security Networks options for EMI sensitive designs, or to allow longer bus lengths. It also features a logic supply pin (V ) that sets the Industrial/Process Control Networks L V level of logic outputs, and the switching points of logic OH Level Translators (e.g., RS-232 to RS-422) inputs, to be compatible with another supply voltage in mixed Point of Sale Equipment voltage systems. The QFN also adds RS-232 mode Tx EN pins (DEN), and active low Rx enable pins (RXEN) to Dual Channel RS-485 Interfaces increase design flexibility. In RS-485 applications, active low Rx enable pins allow Tx/Rx direction control, via a single signal per port, by connecting the corresponding DE and RXEN pins together. For a single port version of these devices, please see the ISL3330, ISL3331 data sheet. TABLE 1. SUMMARY OF FEATURES NO. OF RS-485 DATA RS-232 DATA RS-232 Tx ACTIVE H or L LOW POWER PART NUMBER PACKAGE OPTIONS V PIN ENABLE Rx ENABLE SHUTDOWN PORTS RATE (bps) RATE (kbps) L ISL3332 2 28 Ld SSOP 20M 400 NO NO NONE YES ISL3333 2 40 Ld QFN (6 x 6mm) 20M, 460k, 115k 400 YES YES L YES CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2008. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.ISL3332, ISL3333 Ordering Information PART NUMBER TEMP. RANGE PACKAGE (NOTE) PART MARKING (C) (Pb-Free) PKG. DWG. ISL3332IAZ* 3332 IAZ -40 to +85 28 Ld SSOP M28.209 ISL3333IRZ* 3333 IRZ -40 to +85 40 Ld QFN L40.6x6 *Add -T suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Pinouts ISL3332 (28 LD SSOP) ISL3333 (40 LD QFN) TOP VIEW TOP VIEW C1+ 1 28 C2+ C1- 2 27 C2- 40 39 38 37 36 35 34 33 32 31 V+ 3 26 V CC A1 4 25 R B1 V+ 1 30 R B1 B1 5 24 R A1 A1 2 29 R A1 Y1 6 23 D /DE1 Z1 B1 3 28 D /DE Z1 7 22 D Z1 1 Y1 SEL1 8 21 LB D Y1 4 27 Y1 20 SEL2 9 ON/OFF LB Z1 5 26 Z2 10 19 D Y2 SEL1 ON/OFF 6 25 Y2 11 18 D /DE2 Z2 B2 12 17 R D A2 SEL2 7 24 Y2 A2 13 16 R B2 Z2 D /DE 8 23 Z2 2 GND 14 15 V- Y2 9 22 R A2 R B2 10 21 B2 11 12 13 14 15 16 17 18 19 20 FN6362.0 2 May 27, 2008 A2 NC DEN1 NC SPA C1- SPB C1+ GND C2+ C2- GND RXEN1 V CC NC RXEN2 V- NC DEN2 V L