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File name MAX3386E.pdf

19-1529; Rev 3; 4/01 3.0V, ±25kV ESD-Protected RS-232 Transceiver for PDAs and Cell Phones General Description The MAX3386E 3V-powered EIA/TIA-232 and V.28/V.24 is a communications interface with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. The MAX3386E has two receivers and three transmitters. All RS-232 inputs and outputs are protected to ±25kV using the IEC 1000-4-2 Air-Gap Discharge method, ±8kV using the IEC 1000-4-2 Contact Discharge method, and ±15kV using the Human Body Model. A proprietary low-dropout transmitter output stage enables true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply. The MAX3386E is capable of running at data rates up to 250kbps while maintaining RS-232 compliant output levels. The MAX3386E has a unique VL pin that allows interoperation in mixed-logic voltage systems. Both input and output logic levels are pin programmable through the VL pin. The MAX3386E is available in a space-saving TSSOP package. Features o VL Pin for Compatibility with Mixed-Voltage Systems o Enhanced ESD Protection on Rx Inputs and Tx Outputs ±15kV--Human Body Model ±25kV--IEC 1000-4-2, Air-Gap Discharge ±8kV--IEC 1000-4-2, Contact Discharge o Low 300µA Supply Current o Guaranteed 250kbps Data Rate o 1µA Low-Power Shutdown o Meets EIA/TIA-232 Specifications Down to 3.0V MAX3386E Ordering Information PART MAX3386ECUP MAX3386EEUP TEMP. RANGE 0°C to +70°C -40°C to +85°C PIN-PACKAGE 20 TSSOP 20 TSSOP Applications Subnotebook/Palmtop Computers PDAs and PDA Cradles Cell Phone Data Cables Battery-Powered Equipment Hand-Held Equipment Peripherals +3.3V CBYPASS C1 0.1µF Typical Operating Circuit 20 1 C1+ 3 4 C1SHDN 19 VCC 12 VL V+ 2 C3 0.1µF MAX3386E C2+ C2V- 6 C4 0.1µF Pin Configuration TOP VIEW C1+ 1 V+ 2 C1- 3 C2+ 4 C2- 5 V- 6 T1IN 7 T2IN 8 T3IN 9 R2OUT 10 20 SHDN 19 VCC 18 GND 17 T1OUT C2 0.1µF 5 7 T1IN TTL/CMOS INPUTS T1OUT 17 T2OUT 16 T3OUT 15 VL RS-232 OUTPUTS 8 T2IN 9 T3IN MAX3386E 16 T2OUT 15 T3OUT 14 R1IN 13 R2IN 12 VL 11 R1OUT TTL/CMOS OUTPUTS 11 R1OUT R1IN 14 5k VL RS-232 INPUTS 10 R2OUT R2IN 13 5k GND 18 TSSOP ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 3.0V, ±25kV ESD-Protected RS-232 Transceiver for PDAs and Cell Phones MAX3386E ABSOLUTE MAXIMUM RATINGS VCC to GND ...-0.3V to +6V VL to GND...-0.3V to (VCC + 0.3V) V+ to GND ...-0.3V to +7V V- to GND ...+0.3V to -7V V+ + V-(Note 1) ...