DATASHEET ISL3332, ISL3333 FN6362 Rev 1.00 3.3V, 15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) Jan 21, 2021 Transceivers The ISL3332, ISL3333 are two port interface ICs where each Features port can be independently configured as a single 15kV (HBM) ESD Protected Bus Pins (RS-232 or RS-485/422 transceiver, or as a dual (2 Tx, 2 Rx) RS-232 RS-485) transceiver. With both ports set to the same mode, two Operates From a Single 3.3V Supply RS-485/RS-422 transceivers, or four RS-232 transceivers are available. Two Independent Ports, Each User Selectable for RS-232 (2 Transceivers) or RS-485/RS-422 (1 Transceiver) If either port is in RS-232 mode, the onboard charge pump generates RS-232 compliant 5V Tx output levels from a True Flow-Through Pinouts Simplify Board Layouts single V supply as low as 3.15V. The transceivers are CC Pb-free (RoHS compliant) RS-232 compliant, with the Rx inputs handling up to 25V. Full Failsafe (Open/Short) Rx in RS-485/422 Mode In RS-485 mode, the transceivers support both the RS-485 Loopback Mode Facilitates Board Self Test Functions and RS-422 differential communication standards. The receivers feature full fail-safe operation, so the Rx outputs User Selectable RS-485 Data Rates (ISL3333 Only) remain in a high state if the inputs are open or shorted - Fast Speed 20Mbps together. The transmitters support up to three data rates, two - Slew Rate Limited . 460kbps of which are slew rate limited for problem free - Slew Rate Limited . 115kbps communications. The charge pump disables when both Fast RS-232 Data Rate . Up to 400kbps ports are in RS-485 mode, thereby saving power, minimizing noise, and eliminating the charge pump capacitors. RS-232 Tx and Rx Enable Pins (ISL3333 Only) Both RS-232 and RS-485 modes feature loopback and Small Charge Pump Caps . 4 x 0.1F shutdown functions. Loopback internally connects the Tx Low Current Shutdown Mode .35A outputs to the corresponding Rx input, to facilitate board QFN Package Saves Board Space (ISL3333 Only) level self test implementation. The outputs remain connected to the loads during loopback, so connection problems (e.g., Logic Supply Pin (V ) Eases Operation in Mixed Supply L shorted connectors or cables) can be detected. Shutdown Systems (ISL3333 Only) mode disables the Tx and Rx outputs, disables the charge pumps, and places the IC in a low current (35A) mode. Applications The ISL3333 is a QFN packaged device that includes two Gaming Applications (such as Slot Machines) additional user selectable, lower speed and edge rate Single Board Computers options for EMI sensitive designs, or to allow longer bus Factory Automation lengths. It also features a logic supply pin (V ) that sets the L V level of logic outputs, and the switching points of logic OH Security Networks inputs, to be compatible with another supply voltage in mixed Industrial/Process Control Networks voltage systems. The QFN also adds RS-232 mode Tx EN pins (DEN), and active low Rx enable pins (RXEN) to Level Translators (such as RS-232 to RS-422) increase design flexibility. In RS-485 applications, active low Point of Sale Equipment Rx enable pins allow Tx/Rx direction control, via a single Dual Channel RS-485 Interfaces 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 PORTS RATE (bps) RATE (kbps) ENABLE Rx ENABLE SHUTDOWN 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 FN6362 Rev 1.00 Page 1 of 27 Jan 21, 2021ISL3332, ISL3333 Ordering Information PART NUMBER TEMP. RANGE TAPE AND REEL PACKAGE (Notes 2, 3)PART MARKING (C) (Units) (Note 1) (RoHS Compliant PKG. DWG. ISL3332IAZ 3332 IAZ -40 to +85 - 28 Ld SSOP M28.209 ISL3332IAZ-T 3332 IAZ -40 to +85 1k 28 Ld SSOP M28.209 ISL3333IRZ 3333 IRZ -40 to +85 - 40 Ld QFN L40.6x6 ISL3333IRZ-T 3333 IRZ -40 to +85 4k 40 Ld QFN L40.6x6 ISL3333IRZ-T7A 3333 IRZ -40 to +85 250 40 Ld QFN L40.6x6 NOTES: 1. See TB347 for details about reel specifications. 2. These 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). 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. 3. For Moisture Sensitivity Level (MSL), see the ISL3332, ISL3333 device pages. For more information about MSL, see TB363. 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 19 D Z2 10 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 Rev 1.00 Page 2 of 27 Jan 21, 2021 A2 NC DEN1 NC SPA C1- SPB C1+ GND C2+ C2- GND RXEN1 V CC NC RXEN2 V- NC DEN2 V L