Datasheet ICL3224E, ICL3226E, ICL3244E 15kV ESD Protected, +3V to +5.5V, 1A, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown The ICL3224E, ICL3226E, and ICL3244E devices are Features 3.0V to 5.5V powered RS-232 transmitters/receivers Pb-Free Plus Anneal Available (RoHS Compliant) that meet ElA/TIA-232 and V.28/V.24 specifications, ESD protection for RS-232 I/O pins to 15kV even at V = 3.0V. They provide 15kV ESD CC (IEC61000) protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs Manual and enhanced automatic powerdown (RS-232 pins). Targeted applications are PDAs, Drop in replacements for MAX3224E, MAX3226E, Palmtops, and notebook and laptop computers where MAX3244E the low operational power and even lower standby power consumption are critical. Efficient on-chip Meets EIA/TIA-232 and V.28/V.24 specifications at charge pumps coupled with manual and enhanced 3V automatic powerdown functions, reduce the standby RS-232 compatible with V = 2.7V CC supply current to a 1A trickle. Small footprint Latch-up free packaging and the use of small, low value capacitors ensure board space savings. Data rates greater than On-chip voltage converters require only four 250kbps are ensured at worst case load conditions. external 0.1F capacitors This family is fully compatible with 3.3V only systems, Ensured mouse driveability (ICL3244E) mixed 3.3V and 5.0V systems, and 5.0V only systems. Ready to Transmit indicator output (ICL3224E/ICL3226E) The ICL3244E is a 3-driver, 5-receiver device that Receiver hysteresis for improved noise immunity provides a complete serial port suitable for laptop or notebook computers. It also includes a noninverting Ensured minimum data rate 250kbps always-active receiver for wake-up capability. Ensured minimum slew rate 6V/s The ICL3224E, ICL3226E, and ICL3244E feature an Wide power supply range single +3V to +5.5V enhanced automatic powerdown function that powers down the on-chip power supply and driver circuits. Low supply current in powerdown state 1A Powerdown occurs when all receiver and transmitter Applications inputs detect no signal transitions for a period of 30s. These devices power back up automatically Any system requiring RS-232 communication ports whenever they sense a transition on any transmitter Battery powered, hand-held, and portable or receiver input. equipment Table 1 summarizes the features of the device Laptop computers, notebooks, palmtops represented by this datasheet and AN9863 summarizes the features of each device comprising Modems, printers, and other peripherals the ICL32xxE 3V family. Digital cameras Cellular/mobile phones Related Literature For a full list of related documents, visit our website: ICL3224E, ICL3226E, and ICL3244E device pages FN4899 Rev.7.00 Page 1 of 28 Jun.11.19ICL3224E, ICL3226E, ICL3244E Contents 1. Overview . 3 1.1 Typical Operating Circuits . 3 1.2 Ordering Information . 5 1.3 Pin Configurations . 6 1.4 Pin Descriptions . 6 2. Specifications . 8 2.1 Absolute Maximum Ratings 8 2.2 Thermal Information 8 2.3 Recommended Operating Conditions 8 2.4 Electrical Specifications . 9 3. Typical Performance Curves 11 4. Application Information 12 4.1 Charge-Pump . 12 4.1.1 Charge Pump Abs Max Ratings . 12 4.2 Transmitters . 13 4.3 Receivers . 13 4.4 Powerdown Functionality . 15 4.4.1 Software Controlled (Manual) Powerdown . 16 4.4.2 INVALID Output 16 4.4.3 Enhanced Automatic Powerdown 17 4.4.4 Emulating Standard Automatic Powerdown . 18 4.4.5 Hybrid Automatic Powerdown Options 18 4.5 READY Output (ICL3224E and ICL3226E only) . 19 4.6 Capacitor Selection . 19 4.7 Power Supply Decoupling 19 4.8 Operation Down to 2.7V . 19 4.9 Transmitter Outputs when Exiting Powerdown 19 4.10 Mouse Driveability 20 4.11 High Data Rates . 20 4.12 Interconnection with 3V and 5V Logic . 21 5. 15kV ESD Protection . 22 5.1 Human Body Model (HBM) Testing . 22 5.2 IEC61000-4-2 Testing . 22 5.3 Air-gap discharge test method . 22 5.4 Contact Discharge Test Method 22 6. Die Characteristics . 23 7. Revision History 24 8. Package Outline Drawings . 25 FN4899 Rev.7.00 Page 2 of 28 Jun.11.19