MAX3380E/MAX3381E 19-2128 Rev 0 8/01 +2.35V to +5.5V, 1A, 2Tx/2Rx RS-232 Transceivers with 15kV ESD-Protected I/O and Logic Pins General Description Features The MAX3380E/MAX3381E are +2.35V to +5.5V-pow- 15kV ESD Protection on All CMOS and RS-232 ered EIA/TIA-232 and V.28/V.24 communication inter- Inputs and Outputs (Except INVALID) faces with low power requirements, high data-rate 15kV Human Body Model capabilities, and enhanced electrostatic discharge 15kV IEC 1000-4-2 Air-Gap Discharge (ESD) protection on both the TTL and RS-232 sides. The MAX3380E/MAX3381E have two receivers and two 8kV IEC 1000-4-2 Contact Discharge transmitters. All RS-232 inputs, outputs, and logic input Operates Over Entire Li+ Battery Range pins are protected to 15kV using IEC 1000-4-2 Air- Gap Discharge method and the Human Body Model, Low Logic Threshold Down to +1.65V for and 8kV using IEC 1000-4-2 Contact Discharge Compatibility with Cell Phone Logic Supply Voltages method. 1A Low-Power AutoShutdown Plus Mode The proprietary low-dropout transmitter output stage enables true RS-232 performance from a +3.1V to Compatible with Next-Generation GSM Data Rates +5.5V supply with a dual charge pump. The parts 20-Pin TSSOP Package reduce the transmitter output levels to RS-232-compati- ble levels with no increase in supply current for sup- plies less than +3.1V and greater than +2.35V. The Ordering Information +2.35V to +5.5V operating range is fully compatible with lithium-ion (Li+) batteries. The charge pump PART TEMP. RANGE PIN-PACKAGE requires only four small 0.1F capacitors for operation. MAX3380ECUP 0C to +70C 20 TSSOP The MAX3380E/MAX3381E transceivers use Maxims MAX3380EEUP -40C to +85C 20 TSSOP revolutionary AutoShutdown Plus feature to auto- MAX3381ECUP 0C to +70C 20 TSSOP matically enter a 1A shutdown mode. These MAX3381EEUP -40C to +85C 20 TSSOP devices shut down the on-board power supply and drivers when they do not sense a valid signal transi- tion for 30 seconds on either the receiver or trans- Typical Operating Circuit mitter inputs. +3.3V The MAX3380E is capable of transmitting data at rates of 460kbps while maintaining RS-232 output C5 0.1F levels, and the MAX3381E operates at data rates up V V CC L to 250kbps. The MAX3381E offers a slower slew rate for applications where noise and EMI are issues. The C1+ MAX3380E/MAX3381E have a unique V pin that L C1 V+ allows interoperation in mixed-logic voltage systems 0.1F C3 C1- down to +1.65V. Both input and output logic levels 0.1F MAX3380E/ are referenced to the V pin. The MAX3380E/MAX3381E L C2+ V- MAX3381E C2 C4 are available in a space-saving TSSOP package. 0.1F 0.1F C2- T1IN T1OUT Applications TTL/CMOS RS-232 Cell Phone Data Lump Cables INPUTS OUTPUTS T2IN T2OUT PDA Data Lump Cables V L GPS Receivers R1OUT R1IN Digital Cameras TTL/CMOS 5k RS-232 OUTPUTS V L INPUTS R2OUT R2IN AutoShutdown Plus is a trademark of Maxim Integrated Products 5k Pin Configuration appears at end of data sheet. GND Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. FORCEOFF FORCEON+2.35V to +5.5V, 1A, 2Tx/2Rx RS-232 Transceivers with 15kV ESD-Protected I/O and Logic Pins ABSOLUTE MAXIMUM RATINGS V to GND...........................................................-0.3V to +6.0V Short-Circuit Duration T OUT to GND........................Continuous CC V to GND..............................................................-0.3V to +6.0V Continuous Power Dissipation (T = +70C) L A V+ to GND.............................................................-0.3V to +7.0V 20-Pin TSSOP (derate 10.9mW/C over +70C) .........879mW V- to GND ..............................................................+0.3V to -7.0V Operating Temperature Ranges V+ + V- (Note 1) .................................................................+13V MAX3380ECUP/MAX3381ECUP........................0C to +70C Input Voltages MAX3380EEUP/MAX3381EEUP .....................-40C to +85C T IN, FORCEON, FORCEOFF to GND...............-0.3V to +6.0V Junction Temperature......................................................+150C R IN to GND .....................................................................25V Storage Temperature Range .............................-65C to +150C Output Voltages Lead Temperature (soldering, 10s) .................................+300C T OUT to GND...............................................................13.2V R OUT, INVALID to GND...........................-0.3V to (V + 0.3V) L Note 1: V+ and V- can have maximum magnitudes of +7V, but their absolute difference cannot exceed +13V. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +2.35V to +5.5V, V = +1.65V to +5.5V. When V < +4.5V, C1 = C2 = C3 = C4 = 0.1F when V +4.5V, C1 = 0.047F, CC L CC CC C2 = C3 = C4 = 0.33F T = T to T , unless otherwise noted. Typical values are at V = V = +3.3V, T = +25C.) A MIN MAX CC L A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Receivers idle, V = V or GND, T IN CC 10 Supply Current, AutoShutdown FORCEON = GND, FORCEOFF = V I CC A CC Plus FORCEOFF = GND 1 10 Supply Current, Normal Operation I FORCEON = FORCEOFF = V , no load 0.3 1 mA CC L LOGIC INPUTS (T IN, FORCEON, FORCEOFF) V = +5.5V, V = +5.5V 0.4 1.2 CC L Input Logic Threshold Low V V IL V = +2.5V, V = +1.65V 0.4 CC L V = +5.5V, V = +5.5V V 0.66 CC L L Input Logic Threshold High V V IH V = +2.5V, V = +1.65V V 0.66 CC L L Transmitter Input Hysteresis 0.5 V Input Leakage Current 0.01 1A RECEIVER OUTPUTS (R OUT) AND INVALID Output Voltage Low I = 500A 0.5 V OUT Output Voltage High I = -500A V - 0.4 V - 0.2 V OUT L L RECEIVER INPUTS (R IN) Input Voltage Range -25 +25 V V = +3.3V 0.6 1.2 L Input Threshold Low T = +25C V A V = +5.0V 0.8 1.5 L V = +3.3V 1.5 2.4 L Input Threshold High T = +25C V A V = +5.0V 1.8 2.4 L Input Hysteresis 0.3 V Input Resistance T = +25C 3 5 7 k A 2 MAX3380E/MAX3381E