Datasheet ISL4260E QFN Packaged, 15kV ESD Protected, +3V to +5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers with Separate Logic Supply The ISL4260E contains 3.0V to 5.5V powered RS-232 Features transmitters/receivers that meet ElA/TIA-232 and Available in near chip scale QFN (5mmx5mm) V.28/V.24 specifications, even at V =3.0V. CC package Targeted applications are PDAs, Palmtops, and cell V pin for compatibility with mixed voltage systems phones where the low operational power consumption L and even lower standby power consumption is critical. ESD protection for RS-232 I/O pins to 15kV Efficient on-chip charge pumps coupled with a manual (IEC61000) powerdown function reduces the standby supply Single SHDN pin disables transmitters and current to a 150nA trickle. The 5mm x 5mm Quad Flat receivers No-Lead (QFN) packaging and the use of small, low value capacitors ensure board space savings. Data Meets EIA/TIA-232 and V.28/V.24 specifications rates greater than 250kbps are ensured at worst case at 3V load conditions. On-chip charge pumps require only four external The ISL4260E features a V pin that adjusts the logic 0.1F capacitors L pin output levels (see Pin Descriptions) and input Receiver hysteresis for improved noise immunity thresholds to values compatible with the V CC Very low supply current: 300A powering the external logic (for example, a UART). Guaranteed minimum data rate: 250kbps The single pin powerdown function (SHDN = 0) disables all the receiver and transmitter outputs while Wide power supply range: Single +3V to +5.5V shutting down the charge pump to minimize supply Low supply current in powerdown state: 150nA current drain. Pb-free (RoHS compliant) Table 1 summarizes the features of the ISL4260E. Application Note AN9863 summarizes the features of Applications each device comprising the 3V RS-232 family. Any system requiring RS-232 communication ports Related Literature Battery powered, hand-held, and portable equipment For a full list of related documents, visit our website: Laptop computers, notebooks, and Palmtops ISL4260E device page Digital cameras PDAs and PDA cradles Cellular/mobile phones Table 1. Summary of Features No. Of No. Of Data Rate Rx. Enable V Logic Manual Automatic Powerdown L Part Number Tx. Rx. (kbps) Function Supply Pin Powerdown Function ISL4260E 3 2 250 No Yes Yes No FN6035 Rev.3.00 Page 1 of 19 May.20.19ISL4260E 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 . 5 2.1 Absolute Maximum Ratings 5 2.2 Thermal Information 5 2.3 Recommended Operating Conditions 5 2.4 Electrical Specifications . 6 3. Typical Performance Curves . 8 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 . 12 4.4 Low Power Operation . 12 4.5 Powerdown Functionality . 12 4.6 Software Controlled (Manual) Powerdown . 12 4.7 VL Logic Supply Input . 13 4.8 Capacitor Selection . 13 4.9 Power Supply Decoupling 13 4.10 Transmitter Outputs when Exiting Powerdown 13 4.11 High Data Rates . 14 4.12 Interconnection with 3V and 5V Logic . 14 5. 15kV ESD Protection . 15 5.1 Human Body Model (HBM) Testing . 15 5.2 IEC61000-4-2 Testing . 15 5.3 Air-Gap Discharge Test Method 15 5.4 Contact Discharge Test Method 15 6. Die Characteristics . 16 7. Revision History 17 8. Package Outline Drawing 18 FN6035 Rev.3.00 Page 2 of 19 May.20.19