ICL3237 Data Sheet October 21, 2005 FN6003.3 1 Microamp Supply-Current, +3V to +5.5V, Features 1Mbps, RS-232 Transmitters/Receivers 15kV ESD Protected (Human Body Model) The Intersil ICL3237 contains 3.0V to 5.5V powered RS-232 Drop in Replacement for MAX3237 transmitters/receivers which meet ElA/TIA-232 and Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V V.28/V.24 specifications, even at V = 3.0V. Targeted CC applications are cell phones, PDAs, Palmtops, and notebook Latch-Up Free and laptop computers where the low operational, and even On-Chip Voltage Converters Require Only Four External lower standby, power consumption is critical. Efficient on- Capacitors chip charge pumps, coupled with manual powerdown Manual Powerdown Features function, reduce the standby supply current to a 1A trickle. Small footprint packaging, and the use of small, low value Flow Through Pinout capacitors ensure board space savings as well. Data rates Receiver Hysteresis For Improved Noise Immunity greater than 1Mbps (MBAUD = V ) are guaranteed at CC worst case load conditions. This family is fully compatible Pin Selectable Data Rate with 3.3V only systems, mixed 3.3V and 5.0V systems, and Guaranteed Minimum Data Rate . 250kbps/1Mbps 5.0V only systems. Guaranteed Minimum Slew Rate . 6V/s or 24V/s The ICL3237 is a 5 driver, 3 receiver device that also Wide Power Supply Range . Single +3V to +5.5V includes a noninverting always-active receiver for wake-up capability. Low Supply Current in Powerdown State .1A Table 1 summarizes the features of the device represented Pb-Free Plus Anneal Available (RoHS Compliant) by this data sheet, while Application Note AN9863 summarizes the features of each device comprising the Applications ICL32XX 3V family. Any System Requiring RS-232 Communication Ports - Battery Powered, Hand-Held, and Portable Equipment - Laptop Computers, Notebooks, Palmtops - Modems, Printers and other Peripherals - Digital Cameras - Cellular/Mobile Phone Related Literature Technical Brief TB363 Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs) AN9863 3V to +5.5V, 250k-1Mbps, RS-232 Transmitters/Receivers TABLE 1. SUMMARY OF FEATURES (NOTE 1) NO. OF DATA MANUAL AUTOMATIC PART NO. OF NO. OF MONITOR Rx. RATE Rx. ENABLE READY POWER- POWERDOWN NUMBER Tx. Rx. (R ) (kbps) FUNCTION OUTPUT DOWN FUNCTION OUTB ICL3237 5 3 1 250/1000 YES NO YES NO NOTE: 1. Data rate is selectable via the MBAUD pin. 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. 2001-2002, 2004-2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.ICL3237 Pinout Ordering Information ICL3237 (SSOP) TEMP. TOP VIEW PART RANGE PKG. PART NO. MARKING (C) PACKAGE DWG. C2+ 1 28 C1+ ICL3237CA ICL3237CA 0 to 70 28 Ld SSOP M28.209 GND 2 27 V+ C2- 3 26 V ICL3237CAZ ICL3237CAZ 0 to 70 28 Ld SSOP M28.209 CC (See Note) (Pb-free) V- 4 25 C1- T1 5 24 T1 ICL3237IA ICL3237IA -40 to 85 28 Ld SSOP M28.209 OUT IN T2 6 23 T2 IN OUT ICL3237IAZ ICL3237IAZ -40 to 85 28 Ld SSOP M28.209 T3 7 22 T3 OUT IN (See Note) (Pb-free) 21 R1 R1 8 IN OUT *Add -T suffix to part number for tape and reel packaging. R2 9 20 R2 IN OUT NOTE: Intersil Pb-free plus anneal products employ special Pb-free 10 19 T4 T4 OUT IN material sets molding compounds/die attach materials and 100% R3 11 18 R3 IN OUT matte tin plate termination finish, which are RoHS compliant and T5 12 17 T5 compatible with both SnPb and Pb-free soldering operations. Intersil OUT IN Pb-free products are MSL classified at Pb-free peak reflow EN 13 16 R1 OUTB temperatures that meet or exceed the Pb-free requirements of SHDN 14 15 MBAUD IPC/JEDEC J STD-020. 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. 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. IN T RS-232 level (nominally 5.5V) transmitter outputs. OUT R RS-232 Compatible Receiver Inputs. IN R TTL/CMOS Level Receiver Outputs. OUT R TTL/CMOS Level, Noninverting, Always Enabled Receiver Output. OUTB EN Active Low Receiver Enable Control doesnt disable R output. OUTB SHDN Active Low Input to Shutdown Transmitters and On-Board Power Supply, to place device in low power mode. MBAUD Input Low selects 250kbps data rate, and input high selects 1Mbps data rate. 2