Datasheet ICL3238E 15kV ESD Protected, +3V to +5.5V, 10nA, 250kbps, RS-232 Transceiver with Enhanced Automatic Powerdown The ICL3238E contains 3.0V to 5.5V powered Features RS-232 transmitters/receivers that meet ElA/TIA-232 Pb-free (RoHS compliant) and V.28/V.24 specifications, even at V = 3.0V. It CC ESD protection for RS-232 I/O pins to 15kV provides 15kV ESD protection (IEC61000-4-2 Air (IEC61000) Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted Active feedback resistors on T and logic inputs X applications are cell phones, Palmtops, and data Manual and enhanced automatic powerdown cables in which the low operational power features consumption and even lower standby power consumption is critical. Efficient on-chip charge Pin compatible replacement for MAX3238E, pumps coupled with manual and enhanced automatic MAX3238, and SP3238E powerdown functions reduce the standby supply Meets EIA/TIA-232 and V.28/V.24 specifications current to a 10nA trickle. Small footprint packaging at 3V and the use of small, low value capacitors ensure RS-232 compatible outputs at 2.7V supply board space savings. Data rates greater than 250kbps are ensured at worst-case load conditions Flow through pinout and provide compatibility with popular PC Latch-up free communication software. On-chip voltage converters require only four The ICL3238E is a five driver, three receiver device external capacitors optimized for DCE applications with full hardware Receiver and transmitter hysteresis for improved handshaking. It includes a noninverting, always-active noise immunity receiver for RING INDICATOR monitoring. Guaranteed minimum data rate: 250kbps The ICL3238E features an enhanced automatic powerdown function that powers down the on-chip Guaranteed minimum slew rate: 6V/s power-supply and driver circuits. Automatic Wide power supply range: Single +3V to +5.5V powerdown occurs when all receiver and transmitter inputs detect no signal transitions for a period of 30s. Low supply current in powerdown state: 10nA The ICL3238E automatically powers back up Applications whenever it senses a transition on any transmitter or receiver input. Any system requiring RS-232 communication ports The transmitter and logic inputs include active Battery powered, hand-held, and portable feedback resistors that retain the input state when equipment driven to a valid logic level. Data cradles Table 1 summarizes the features of the ICL3238E. Modems, printers, and other peripherals Application Note AN9863 summarizes the features of Cellular/mobile phones and data cables each device in the ICL32xxE 3V RS-232 family. Related Literature For a full list of related documents, visit our website: ICL3238E device page Table 1. Summary of Features Enhanced Automatic No. of No. of No. of Monitor Data Rate Rx. Enable Ready Manual Powerdown Part Number Tx. Rx. Rx. (R ) (kbps) Function Output Powerdown Function OUTB ICL3238E 5 3 1 250 No No Yes Yes FN6012 Rev.4.00 Page 1 of 24 Apr.26.19ICL3238E Contents 1. Overview . 3 1.1 Typical Operating Circuit 3 1.2 Ordering Information . 3 1.3 Pin Configuration 4 1.4 Pin Descriptions . 4 2. Specifications . 6 2.1 Absolute Maximum Ratings 6 2.2 Thermal Information 6 2.3 Recommended Operating Conditions 6 2.4 Electrical Specifications . 7 3. Typical Performance Curves . 9 4. Application Information 10 4.1 Charge Pump 10 4.1.1 Charge Pump Abs Max Ratings . 10 4.2 Transmitters . 11 4.3 Receivers . 11 4.4 Operation Down to 2.7V . 13 4.5 Powerdown Functionality . 13 4.5.1 Software Controlled (Manual) Powerdown . 13 4.5.2 INVALID Output 13 4.5.3 Enhanced Automatic Powerdown 15 4.5.4 Emulating Standard Automatic Powerdown . 16 4.5.5 Hybrid Automatic Powerdown Options 16 4.6 Capacitor Selection . 16 4.7 Power Supply Decoupling 17 4.8 Transmitter Outputs when Exiting Powerdown 17 4.9 High Data Rates . 18 4.10 Interconnection with 3V and 5V Logic . 18 5. 15kV ESD Protection . 19 5.1 Human Body Model (HBM) Testing . 19 5.2 IEC61000-4-2 Testing . 19 5.3 Air-Gap Discharge Test Method 19 5.4 Contact Discharge Test Method 19 6. Die Characteristics . 20 7. Revision History 21 8. Package Outline Drawings . 22 FN6012 Rev.4.00 Page 2 of 24 Apr.26.19