Click here for production status of specific part numbers. MAX3222/MAX3232/ 3.0V to 5.5V, Low-Power, Up to 1Mbps, MAX3237/MAX3241* True RS-232 Transceivers Benefits and Features General Description Integrated Features Saves Board Space and The MAX3222/MAX3232/MAX3237/MAX3241 transceivers Simplifies Design have a proprietary low-dropout transmitter output stage Charge Pump Circuitry Eliminates the Need for a enabling true RS-232 performance from a 3.0V to 5.5V Bipolar 12V Supply supply with a dual charge pump. The devices require only Wide Single-Supply Operation From +3V to +5.5V four small 0.1F external charge-pump capacitors. The Supply MAX3222, MAX3232, and MAX3241 are guaranteed to Always-On Extra Outputs Enable Monitoring of run at data rates of 120kbps while maintaining RS-232 External Devices output levels. The MAX3237 is guaranteed to run at data rates of 250kbps in normal operating mode and 1Mbps in Power Saving Extends Battery Life the MegaBaud operating mode. 1A Supply Current in Shutdown Mode While Receiver is Active (MAX3222, MAX3237, MAX3241) The MAX3222/MAX3232 have 2 receivers and 2 drivers. The MAX3222 and MAX3232 are pin, package, and func- Ordering Information tionally compatible with the industry-standard MAX242 PIN- PKG and MAX232, respectively. PART TEMP RANGE PACKAGE CODE The MAX3241 has 5 receivers and 3 drivers, while the MAX3222CUP+ 0C to +70C 20 TSSOP U20+2 MAX3237 has 3 receivers and 5 drivers. Receivers R1 (MAX3237/MAX3241) and R2 (MAX3241) have extra MAX3222CAP+ 0C to +70C 20 SSOP A20+1 outputs in addition to their standard outputs. These extra MAX3222CWN+ 0C to +70C 18 SO W18+1 outputs are always active, allowing external devices to be MAX3222CPN+ 0C to +70C 18 Plastic Dip P18+5 monitored without forward biasing the protection diodes in +Denotes lead-free package. completely removed. circuitry that may have V CC The MAX3222, MAX3232, and MAX3241 are available in Pin Configurations space-saving TSSOP and SSOP packages with operating temperatures of either -40C to +85C or 0C to 70C. TOP VIEW 1 EN 18 SHDN Applications 2 C1+ 17 V CC Battery-Powered Equipment 3 16 V+ GND Hand-Held Equipment 4 15 T1OUT C1- Peripherals MAX3222 Datacom Equipment 5 14 C2+ R1IN 6 13 C2- R1OUT 12 V- 7 T1IN 8 11 T2IN T2OUT 9 10 R2IN R2OUT Ordering Information continued at end of data sheet. DIP/SO Pin Configurations continued at end of data sheet. Typical Operating Circuits appear at end of data sheet. MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc. *Covered by U.S. Patent numbers 4,636,930 4,679,134 4,777,577 4,797,899 4,809,152 4,897,774 4,999,761 and other patents pending. 19-0273 Rev 10 5/19MAX3222/MAX3232/ 3.0V to 5.5V, Low-Power, Up to 1Mbps, MAX3237/MAX3241 True RS-232 Transceivers Absolute Maximum Ratings V ..........................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A V+ (Note 1) ..............................................................-0.3V to +7V 16-Pin TSSOP (derate 6.7mW/C above +70C) ........533mW V- (Note 1) ...............................................................+0.3V to -7V 16-Pin Narrow SO (derate 8.70mW/C above +70C) ....696mW V+ + V- (Note 1) ..................................................................+13V 16-Pin Wide SO (derate 9.52mW/C above +70C) ...762mW Input Voltages 16-Pin Plastic DIP (derate 10.53mW/C above +70C) ..842mW T IN, SHDN, EN..................................................-0.3V to +6V 18-Pin SO (derate 9.52mW/C above +70C) .............762mW MBAUD ................................................. -0.3V to (V + 0.3V) 18-Pin Plastic DIP (derate 11.11mW/C above +70C) ...889mW CC R IN.................................................................................25V 20-Pin SSOP (derate 7.00mW/C above +70C) ........559mW Output Voltages 20-Pin TSSOP (derate 8.0mW/C above +70C) ........640mW T OUT ..........................................................................13.2V 28-Pin TSSOP (derate 8.7mW/C above +70C) ........696mW R OUT .................................................. -0.3V to (V + 0.3V) 28-Pin SSOP (derate 9.52mW/C above +70C) ........762mW CC Short-Circuit Duration 28-Pin SO (derate 12.50mW/C above +70C) ..................1W T OUT ...................................................................Continuous Operating Temperature Ranges MAX32 C ...................................................0C to +70C MAX32 E .............................................. -40C to +85C Storage Temperature Range ............................ -65C to +150C Lead Temperature (soldering, 10s) .................................+300C Note 1: V+ and V- can have a maximum magnitude 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 = +3.0V to +5.5V, C1C4 = 0.1F (Note 2), T = T to T , unless otherwise noted. Typical values are at T = +25C.) CC A MIN MAX A PARAMETER CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS MAX3222/MAX3232/ 0.3 1.0 No load, V = 3.3V or 5.0V, CC MAX3241 V Power-Supply Current mA CC T = +25C A MAX3237 0.5 2.0 Shutdown Supply Current SHDN = GND, T = +25C 1.0 10 A A LOGIC INPUTS AND RECEIVER OUTPUTS Input Logic Threshold Low T IN, EN, SHDN, MBAUD 0.8 V (Note 3) V = 3.3V 2.0 Input Logic Threshold High CC V (Note 3) V = 5.0V 2.4 CC Input Leakage Current T IN, EN, SHDN, MBAUD 0.01 1.0 A Output Leakage Current Receivers disabled 0.05 10 A Output Voltage Low I = 1.6mA 0.4 V OUT V - V CC CC Output Voltage High I = -1.0mA V OUT 0.6 - 0.1 RECEIVER INPUTS Input Voltage Range -25 25 V V = 3.3V 0.6 1.2 CC Input Threshold Low T = +25C V A V = 5.0V 0.8 1.5 CC V = 3.3V 1.5 2.4 CC Input Threshold High T = +25C V A V = 5.0V 1.8 2.4 CC Maxim Integrated 2 www.maximintegrated.com