DATASHEET ISL33334E, ISL33337E FN8776 Rev 1.00 3.3V, 15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) October 21, 2016 Transceivers The ISL33334E, ISL33337E are two port interface ICs where Features port 1 is configured as a dual (2 Tx, 2 Rx) RS-232 transceiver 15kV (HBM) ESD protected bus pins (RS-232 or RS-485) and port 2 is a single RS-485/RS-422 transceiver. Operates from a single 3.3V supply The on-board charge pump generates RS-232 compliant 5V Tx output levels from a single V supply as low as 3.15V. The Two independent ports, port 1 set for RS-232 (2 Transceivers) CC transceivers are RS-232 compliant, with the Rx inputs and port 2 for RS-485/RS-422 (1 transceiver) handling up to 25V. True flow-through pinouts (Rx inputs and Tx outputs all on the same side) simplify board layouts The port 2 transceiver supports both the RS-485 and RS-422 differential communication standards. The receiver features Pb-free (RoHS compliant) full fail-safe operation, so the Rx output remains in a high Full fail-safe (open/short) RS-485/422 Port 2 Rx state if the inputs are open or shorted together. The User selectable RS-485 data rates transmitter supports two data rates, one of which is slew rate limited for problem free communication at low data rates. The - Fast speed up to 20Mbps active low Rx enable pin (RE485) allows Tx/Rx direction - Slew rate limited up to 115kbps control, via a single signal, simply by connecting the Fast RS-232 data rate up to 400kbps corresponding DE485 and RE485 pins together. Small charge pump capacitors 4 x 0.1F The ISL33334E and ISL33337E also include a shutdown function, which disables the Tx and Rx outputs, disables the Low current shutdown mode 40A charge pumps and places the IC in a low current (40A) mode. QFN package saves board space (ISL33337E only) The ISL33337E is a QFN packaged device for space Applications constrained applications. Gaming applications (e.g., slot machines) Related Literature Single board computers For a full list of related documents, visit our website Factory automation - ISL33334E, ISL33337E product pages Security networks Industrial/process control networks Level translators (e.g., RS-232 to RS-422) Point-of-sale equipment TABLE 1. SUMMARY OF FEATURES PORT 2 PORT 1 LOW POWER PORT 2 PART NUMBER PACKAGE OPTION RS-485 DATA RATE (bps) RS-232 DATA RATE (bps) SHUTDOWN RS-485 Rx AND Tx ENABLE ISL33334E 28 Ld SSOP 20M, 115k 400k YES YES ISL33337E 40 Ld QFN (6x6mm) 20M, 115k 400k YES YES FN8776 Rev 1.00 Page 1 of 23 October 21, 2016ISL33334E, ISL33337E Ordering Information PART NUMBER TEMP. RANGE TAPE AND REEL PACKAGE PKG. (Notes 2, 3)PART MARKING (C) (UNITS) (RoHS COMPLIANT) DWG. ISL33334EIAZ 33334E IAZ -40 to +85 - 28 Ld SSOP M28.209 ISL33334EIAZ-T (Notes 1) 33334E IAZ -40 to +85 1k 28 Ld SSOP M28.209 ISL33337EIRZ 33337E IRZ -40 to +85 - 40 Ld QFN L40.6x6 ISL33337EIRZ-T (Notes 1) 33337E IRZ -40 to +85 1k 40 Ld QFN L40.6x6 ISL33337EIRZ-T7A (Notes 1) 33337E IRZ -40 to +85 250 40 Ld QFN L40.6x6 NOTES: 1. Refer to TB347 for details on reel specifications. 2. 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. 3. For Moisture Sensitivity Level (MSL), see product information page for ISL33334E, ISL33337E. For more information on MSL, see tech brief TB363. TABLE 2. KEY DIFFERENCES BETWEEN FAMILY OF PARTS VCC RS485 (bps) RS232 (bps) PART NUMBER (V) PKG DATA RATE DATA RATE ISL33354E 5 28Ld SSOP 20M, 115k 650k ISL33357E 5 40Ld QFN 20M, 115k 650k ISL33334E 3.3 28Ld SSOP 20M, 115k 400k ISL33337E 3.3 40Ld QFN 20M, 115k 400k NOTE: For a full list of dual protocol transceivers, please visit our website. Pin Configurations ISL33334E ISL33337E (28 LD SSOP) (40 LD QFN) TOP VIEW TOP VIEW C1+ 1 28 C2+ 40 39 38 37 36 35 34 33 32 31 PORT 1 C1- 2 27 C2- V+ 3 26 V CC PORT 1 V+ 1 30 R2OUT R R 25 R2OUT R1IN 4 R1IN 2 29 R R1OUT R2IN 5 24 R1OUT R T1OUT 6 23 T2IN R2IN D 3 28 T2IN D T2OUT 7 22 T1IN T1OUT 4 27 T1IN *GND 8 21 SHDN D D T2OUT 26 5 *V CC *V 9 20 DI CC *GND 6 25 SHDN Y 10 19 DE485 Z 11 D 18 RO PORT 2 *V 7 24 DI CC A 12 17 V- D 8 23 DE485 R Y B 13 16 RE485 9 22 RO Z SLOW485 14 15 GND PORT 2 R EP DNC 10 21 A * NOT A SUPPLY PIN, BUT MUST BE CONNECTED TO THE 11 12 13 14 15 16 17 18 19 20 NOTED SUPPLY. FN8776 Rev 1.00 Page 2 of 23 October 21, 2016 NC B *V NC CC SLOW485 C1- *V CC C1+ C2+ GND GND C2- V CC *GND NC RE485 V- NC V *V CC CC