ISL4260E Data Sheet June 21, 2010 FN6035.2 QFN Packaged, 15kV ESD Protected, +3V Features to +5.5V, 150nA, 250kbps, RS-232 Available in Near Chip Scale QFN (5mmx5mm) Package Transmitters/Receivers with Separate V Pin for Compatibility with Mixed Voltage Systems L Logic Supply 15kV (IEC61000) ESD Protection for RS-232 I/O Pins to The ISL4260E contains 3.0V to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and Single SHDN Pin Disables Transmitters and Receivers V.28/V.24 specifications, even at V = 3.0V. Targeted CC Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V applications are PDAs, Palmtops, and cell phones where the On-Chip Charge Pumps Require Only Four External low operational, and even lower standby, power 0.1F Capacitors consumption is critical. Efficient on-chip charge pumps, coupled with a manual powerdown function reduces the Receiver Hysteresis For Improved Noise Immunity standby supply current to a 150nA trickle. Tiny 5mm x 5mm Very Low Supply Current 300A Quad Flat No-Lead (QFN) packaging, and the use of small, low value capacitors ensure board space savings as well. Guaranteed Minimum Data Rate . 250kbps Data rates greater than 250kbps are guaranteed at worst Wide Power Supply Range . Single +3V to +5.5V case load conditions. Low Supply Current in Powerdown State .150nA The ISL4260E features a V pin that adjusts the logic pin L Pb-Free (RoHS Compliant) (see Pin Descriptions table) output levels and input thresholds to values compatible with the V powering the CC Applications external logic (e.g., a UART). Any System Requiring RS-232 Communication Ports The single pin powerdown function (SHDN = 0) disables all the receiver and transmitter outputs, while shutting down the - Battery Powered, Hand-Held, and Portable Equipment charge pump to minimize supply current drain. - Laptop Computers, Notebooks, Palmtops - Digital Cameras Table 1 summarizes the features of the ISL4260E, while - PDAs and PDA Cradles Application Note AN9863 summarizes the features of each - Cellular/Mobile Phones device comprising the 3V RS-232 family. Ordering Information TEMP. PART PART RANGE PKG. o NUMBER MARKING ( C) PACKAGE DWG ISL4260EIRZ* ISL4260 EIRZ -40 to +85 32 Lead QFN L32.5x5B (Note) (Pb-free) *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. TABLE 1. SUMMARY OF FEATURES PART NO. OF NO. OF DATA RATE Rx. ENABLE V LOGIC MANUAL AUTOMATIC L NUMBER Tx. Rx. (kbps) FUNCTION SUPPLY PIN POWER- DOWN POWERDOWN FUNCTION ISL4260E 3 2 250 NO YES YES NO 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. 2004, 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners.ISL4260E Pinout ISL4260E (32 LD QFN) TOP VIEW 32 31 30 29 28 27 26 25 NC 1 24 NC T1 C2+ OUT 2 23 T2 C2- OUT 3 22 T3 V- OUT 4 21 PD NC T1 5 20 IN R1 T2 IN 6 19 IN NC R2 7 18 IN NC NC 8 17 9 10 11 12 13 14 15 16 Pin Descriptions PIN FUNCTION V System power supply input (3.0V to 5.5V). CC V+ Internally generated positive transmitter supply (+5.5V). V- Internally generated negative transmitter supply (-5.5V). GND Ground connection. This is also the potential of the thermal pad (PD). C1+ External capacitor (voltage doubler) is connected to this lead. C1- External capacitor (voltage doubler) is connected to this lead. C2+ External capacitor (voltage inverter) is connected to this lead. C2- External capacitor (voltage inverter) is connected to this lead. T TTL/CMOS compatible transmitter Inputs. The switching point is a function of the V voltage. IN L T 15kV ESD Protected, RS-232 level (nominally 5.5V) transmitter outputs. OUT R 15kV ESD Protected, RS-232 compatible receiver inputs. IN R TTL/CMOS level receiver outputs. Swings between GND and V . OUT L V Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply. L SHDN Active low TTL/CMOS input to tri-state receiver and transmitter outputs and to shut down the on-board power supply to place device in low power mode. The switching point is a function of the V voltage. L NC No Connection PD Exposed Thermal Pad. Connect to GND. 2 NC NC T3 IN C1- NC V+ R2 C1+ OUT SHDN R1 OUT NC V CC V L GND NC NC