DATASHEET ISL3232E, ISL4221E, ISL4223E FN6045 Rev 6.00 QFN Packaged, 15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kbps, RS-232 May 13, 2010 Transmitters/Receivers The Intersil ISL3232E and ISL4221E, ISL4223E devices are Features 2.7V to 5.5V powered RS-232 transmitters/receivers which Available in Near Chip Scale QFN (5mmx5mm) Package, meet ElA/TIA-232 and V.28/V.24 specifications, even at which is 40% Smaller than a 20 Ld TSSOP V = 3.0V. Additionally, they provide 15kV ESD protection CC (IEC61000-4-2 Air Gap and Human Body Model) on ESD Protection for RS-232 I/O Pins to 15kV (IEC61000) transmitter outputs and receiver inputs (RS-232 pins). Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V Targeted applications are PDAs, Palmtops, and hand-held RS-232 Compatible with V = 2.7V products where the low operational, and even lower standby, CC power consumption is critical. Efficient on-chip charge pumps, On-Chip Voltage Converters Require Only Four External coupled with manual and automatic power-down functions, 0.1F Capacitors reduce the standby supply current to a 150nA trickle. Tiny Manual and Automatic Power-down Features (Except 5mmx5mm Quad Flat No-Lead (QFN) packaging and the ISL3232E) use of small, low value capacitors ensure board space Receiver Hysteresis For Improved Noise Immunity savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions. Guaranteed Minimum Data Rate . 250kbps The ISL4221E is a 1 driver, 1 receiver device and the Wide Power Supply Range Single +2.7V to +5.5V ISL3232E and ISL4223E are 2 driver, 2 receiver devices Low Supply Current in Power-down State 150nA that, coupled with the 5mmx5mm QFN package, provide the industrys smallest, lowest power serial port suitable for Pb-Free Available (RoHS Compliant) PDAs, and hand-held applications. The 5mmx5mm QFN Applications requires 40% less board area than a 20 Ld TSSOP, and is nearly 20% thinner. Any Space Constrained System Requiring RS-232 Ports The ISL4221E, ISL4223E versions feature an automatic - Battery Powered, and Portable Equipment power-down function that powers down the on-chip power - Hand-Held Products (GPS Receivers, Bar Code supply and driver circuits. This occurs when an attached Scanners, etc.) peripheral device is shut off or the RS-232 cable is removed, - PDAs and Palmtops, Data Cables conserving system power automatically without changes to - Cellular/Mobile Phones, Digital Cameras the hardware or operating system. It powers up again when a valid RS-232 voltage is applied to any receiver input. Related Literature Technical Brief TB363 Guidelines for Handling and Table 1 summarizes the features of the ICs, while Processing Moisture Sensitive Surface Mount Devices Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family. Technical Brief TB379 Thermal Characterization of Packages for ICs Technical Brief TB389 PCB Land Pattern Design and Surface Mount Guidelines for QFN Packages TABLE 1. SUMMARY OF FEATURES NO. OF NO. OF QFN PKG. DATA RATE Rx. ENABLE MANUAL AUTOMATIC POWER-DOWN PART NUMBER Tx. Rx. AVAILABLE (kbps) FUNCTION POWER-DOWN FUNCTION ISL4221E 1 1 YES 250 YES YES YES ISL3232E 2 2 YES 250 NO NO NO ISL4223E 2 2 YES 250 YES YES YES FN6045 Rev 6.00 Page 1 of 14 May 13, 2010ISL3232E, ISL4221E, ISL4223E Ordering Information PART PART TEMP. PKG. NUMBER MARKING RANGE (C) PACKAGE DWG. ISL3232EIRZ* (Note) ISL3232 EIRZ -40 to +85 16 Ld QFN (Pb-free) L16.5x5B ISL4221EIR* ISL 4221EIR -40 to +85 16 Ld QFN L16.5x5B ISL4221EIRZ* (Note) ISL4221 EIRZ -40 to +85 16 Ld QFN (Pb-free) L16.5x5B ISL4223EIR* ISL 4223EIR -40 to +85 20 Ld QFN L20.5x5 ISL4223EIRZ* (Note) ISL4223 EIRZ -40 to +85 20 Ld QFN (Pb-free) L20.5x5 *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 ISL3232E ISL4221E (16 LD QFN) (16 LD QFN) TOP VIEW TOP VIEW 16 15 14 13 C1- 1 12 T1OUT 16 15 14 13 C2+ 2 11 R1IN V+ 1 12 GND PD C2- 3 10 R1OUT C1- 2 11 T1OUT PD V- 4 9 T1IN C2+ 3 10 FORCEON 576 8 C2- 4 9 T1IN 576 8 ISL4223E (20 LD QFN) TOP VIEW 20 19 18 17 16 V+ 1 15 T1OUT R1IN C1- 2 14 13 R1OUT C2+ 3 PD C2- 4 12 FORCEON T1IN V- 5 11 6 78 9 10 FN6045 Rev 6.00 Page 2 of 14 May 13, 2010 T2OUT V+ R2IN C1+ R2OUT VCC T2IN GND T2OUT C1+ R2IN EN R2OUT FORCEOFF VCC INVALID GND T2IN V- C1+ R1IN EN R1OUT FORCEOFF VCC INVALID