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MAX3222ECWN+

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MAX3222ECWN+

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Part Number MAX3222ECWN+
Manufacturer Maxim Integrated
Description IC TXRX RS-232 LP 18-SOIC
Datasheet MAX3222ECWN+ Datasheet
Package 18-SOIC (0.295", 7.50mm Width)
In Stock 357 piece(s)
Unit Price $ 3.7600 *
Lead Time Can Ship Immediately
Estimated Delivery Time Oct 23 - Oct 28 (Choose Expedited Shipping)
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Part Number # MAX3222ECWN+ (Interface - Drivers, Receivers, Transceivers) is manufactured by Maxim Integrated and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

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MAX3222ECWN+ Specifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - Interface - Drivers, Receivers, Transceivers
Datasheet MAX3222ECWN+Datasheet
Package18-SOIC (0.295", 7.50mm Width)
Series-
TypeTransceiver
ProtocolRS232
Number of Drivers/Receivers2/2
DuplexFull
Receiver Hysteresis500mV
Data Rate1Mbps
Voltage - Supply3 V ~ 5.5 V
Operating Temperature0°C ~ 70°C
Mounting TypeSurface Mount
Package / Case18-SOIC (0.295", 7.50mm Width)
Supplier Device Package18-SOIC

MAX3222ECWN+ Datasheet

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AVAILABL E EVALUATION KIT AVAILABLE Functional Diagrams Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. General Description The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24 communications interface devices feature low power con- sumption, high data-rate capabilities, and enhanced electrostatic-discharge (ESD) protection. The enhanced ESD structure protects all transmitter outputs and receiver inputs to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge (±9kV for MAX3246E), and ±15kV using the Human Body Model. The logic and receiver I/O pins of the MAX3237E are protected to the above standards, while the transmit- ter output pins are protected to ±15kV using the Human Body Model. A proprietary low-dropout transmitter output stage delivers true RS-232 performance from a +3.0V to +5.5V power supply, using an internal dual charge pump. The charge pump requires only four small 0.1µF capacitors for opera- tion from a +3.3V supply. Each device guarantees opera- tion at data rates of 250kbps while maintaining RS-232 output levels. The MAX3237E guarantees operation at 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232- compliant output levels. The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1µA shutdown mode that reduces power consumption in battery-pow- ered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1µA of supply current. The MAX3222E and MAX3232E are pin, package, and func- tionally compatible with the industry-standard MAX242 and MAX232, respectively. The MAX3241E/MAX3246E are complete serial ports (three drivers/five receivers) designed for notebook and subnotebook computers. The MAX3237E (five drivers/ three receivers) is ideal for peripheral applications that require fast data transfer. These devices feature a shut- down mode in which all receivers remain active, while consuming only 1µA (MAX3241E/MAX3246E) or 10nA (MAX3237E). The MAX3222E, MAX3232E, and MAX3241E are avail- able in space-saving SO, SSOP, TQFN and TSSOP pack- ages. The MAX3237E is offered in an SSOP package. The MAX3246E is offered in the ultra-small 6 x 6 UCSP™ package. Next-Generation Device Features ♦ For Space-Constrained Applications MAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V to +5.5V, RS-232 Transceivers in UCSP ♦ For Low-Voltage or Data Cable Applications MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2Tx/2Rx, RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins Applications Battery-Powered Equipment Cell Phones Smart Phones Cell-Phone Data Cables Notebook, Subnotebook, and Palmtop Computers Printers xDSL Modems ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 19-1298; Rev 12; 12/10 Ordering Information Ordering Information continued at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. *Dice are tested at TA = +25°C, DC parameters only. **EP = Exposed pad. /V denotes an automotive qualified part. Pin Configurations, Selector Guide, and Typical Operating Circuits appear at end of data sheet. PART TEMP RANGE PIN-PACKAGE MAX3222ECTP+ 0°C to +70°C 20 TQFN-EP** (5mm x 5mm) MAX3222ECUP+ 0°C to +70°C 20 TSSOP MAX3222ECAP+ 0°C to +70°C 20 SSOP MAX3222ECWN+ 0°C to +70°C 18 Wide SO MAX3222ECPN+ 0°C to +70°C 18 Plastic DIP MAX3222EC/D+ 0°C to +70°C Dice* MAX3222EETP+ -40°C to +85°C 20 TQFN-EP** (5mm x 5mm) MAX3222EEUP/V+ -40°C to +85°C 20 TSSOP MAX3222EEUP+ -40°C to +85°C 20 TSSOP MAX3222EEAP+ -40°C to +85°C 20 SSOP MAX3222EEWN+ -40°C to +85°C 18 Wide SO MAX3222EEPN+ -40°C to +85°C 18 Plastic DIP MAX3232ECAE+ 0°C to +70°C 16 SSOP MAX3232ECWE+ 0°C to +70°C 16 Wide SO MAX3232ECPE+ 0°C to +70°C 16 Plastic DIP MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc. MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) 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. VCC to GND..............................................................-0.3V to +6V V+ to GND (Note 1) ..................................................-0.3V to +7V V- to GND (Note 1) ...................................................+0.3V to -7V V+ + |V-| (Note 1).................................................................+13V Input Voltages T_IN, EN, SHDN, MBAUD to GND ........................-0.3V to +6V R_IN to GND .....................................................................±25V Output Voltages T_OUT to GND...............................................................±13.2V R_OUT, R_OUTB (MAX3237E/MAX3241E)...-0.3V to (VCC + 0.3V) Short-Circuit Duration, T_OUT to GND.......................Continuous Continuous Power Dissipation (TA = +70°C) 16-Pin SSOP (derate 7.14mW/°C above +70°C) ..........571mW 16-Pin TSSOP (derate 9.4mW/°C above +70°C) .......754.7mW 16-Pin TQFN (derate 20.8mW/°C above +70°C) .....1666.7mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW 18-Pin PDIP (derate 11.11mW/°C above +70°C)..........889mW 20-Pin TQFN (derate 21.3mW/°C above +70°C) ........1702mW 20-Pin TSSOP (derate 10.9mW/°C above +70°C) ........879mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW 28-Pin SSOP (derate 9.52mW/°C above +70°C) ..........762mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 28-Pin TSSOP (derate 12.8mW/°C above +70°C) ......1026mW 32-Pin TQFN (derate 33.3mW/°C above +70°C)...........2666mW 6 x 6 UCSP (derate 12.6mW/°C above +70°C) .............1010mW Operating Temperature Ranges MAX32_ _EC_ _ ...................................................0°C to +70°C MAX32_ _EE_ _.................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) .......................................+260°C Bump Reflow Temperature (Note 2) Infrared, 15s..................................................................+200°C Vapor Phase, 20s..........................................................+215°C Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recom- mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed. PARAMETER CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS (VCC = +3.3V or +5V, TA = +25°C) MAX3222E, MAX3232E, MAX3241E, MAX3246E 0.3 1 Supply Current SHDN = VCC, no load MAX3237E 0.5 2.0 mA SHDN = GND 1 10 μA Shutdown Supply Current SHDN = R_IN = GND, T_IN = GND or VCC (MAX3237E) 10 300 nA LOGIC INPUTS Input Logic Low T_IN, EN, SHDN, MBAUD 0.8 V VCC = +3.3V 2.0 Input Logic High T_IN, EN, SHDN, MBAUD VCC = +5.0V 2.4 V Transmitter Input Hysteresis 0.5 V T_IN, EN, SHDN MAX3222E, MAX3232E, MAX3241E, MAX3246E ±0.01 ±1 Input Leakage Current T_IN, SHDN, MBAUD MAX3237E (Note 5) 9 18 μA 2 Maxim Integrated MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ELECTRICAL CHARACTERISTICS (continued) (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER CONDITIONS MIN TYP MAX UNITS RECEIVER OUTPUTS Output Leakage Current R_OUT (MAX3222E/MAX3237E/MAX3241E/ MAX3246E), EN = VCC, receivers disabled ±0.05 ±10 μA Output-Voltage Low IOUT = 1.6mA (MAX3222E/MAX3232E/MAX3241E/ MAX3246E), IOUT = 1.0mA (MAX3237E) 0.4 V Output-Voltage High IOUT = -1.0mA VCC - 0.6 VCC - 0.1 V RECEIVER INPUTS Input Voltage Range -25 +25 V VCC = +3.3V 0.6 1.1 Input Threshold Low TA = +25°C VCC = +5.0V 0.8 1.5 V VCC = +3.3V 1.5 2.4 Input Threshold High TA = +25°C VCC = +5.0V 2.0 2.4 V Input Hysteresis 0.5 V Input Resistance TA = +25°C 3 5 7 k TRANSMITTER OUTPUTS Output Voltage Swing All transmitter outputs loaded with 3k! to ground (Note 6) ±5 ±5.4 V Output Resistance VCC = 0V, transmitter output = ±2V 300 50k Output Short-Circuit Current ±60 mA Output Leakage Current VCC = 0V or +3.0V to +5.5V, VOUT = ±12V, transmitters disabled (MAX3222E/MAX3232E/MAX3241E/MAX3246E) ±25 μA MOUSE DRIVABILITY (MAX3241E) Transmitter Output Voltage T1IN = T2IN = GND, T3IN = VCC, T3OUT loaded with 3k to GND, T1OUT and T2OUT loaded with 2.5mA each ±5 V ESD PROTECTION Human Body Model ±15 IEC 1000-4-2 Air-Gap Discharge (except MAX3237E) ±15 IEC 1000-4-2 Contact Discharge (except MAX3237E) ±8 R_IN, T_OUT IEC 1000-4-2 Contact Discharge (MAX3246E only) ±9 kV Human Body Model ±15 IEC 1000-4-2 Air-Gap Discharge ±15 T_IN, R_IN, R_OUT, EN, SHDN, MBAUD MAX3237E IEC 1000-4-2 Contact Discharge ±8 kV Maxim Integrated 3 MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers TIMING CHARACTERISTICS—MAX3237E (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) Note 3:MAX3222E/MAX3232E/MAX3241E: C1–C4 = 0.1µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 = 0.33µF tested at +5.0V ±10%. MAX3237E: C1–C4 = 0.1µF tested at +3.3V ±5%, C1–C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 = 0.33µF tested at +5.0V ±10%. MAX3246E: C1-C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.22µF, C2, C3, C4 = 0.54µF tested at +5.0V ±10%. Note 4:MAX3246E devices are production tested at +25°C. All limits are guaranteed by design over the operating temperature range. Note 5:The MAX3237E logic inputs have an active positive feedback resistor. The input current goes to zero when the inputs are at the supply rails. Note 6: MAX3241EEUI is specified at TA = +25°C. Transmitter skew is measured at the transmitter zero crosspoints. PARAMETER CONDITIONS MIN TYP MAX UNITS RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = GND 250 VCC = +3.0V to +4.5V, RL = 3kΩ, CL = 250pF, one transmitter switching, MBAUD = VCC 1000Maximum Data Rate VCC = +4.5V to +5.5V, RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = VCC 1000 kbps tPHL 0.15 Receiver Propagation Delay R_IN to R_OUT, CL = 150pF tPLH 0.15 µs Receiver Output Enable Time Normal operation 2.6 µs Receiver Output Disable Time Normal operation 2.4 µs |tPHL - tPLH|, MBAUD = GND Transmitter Skew (Note 7) |tPHL - tPLH|, MBAUD = VCC 100 ns Receiver Skew |tPHL - tPLH| 50 ns MBAUD = GND 6 30CL = 150pF to 1000pF MBAUD = VCC 24 150 VCC = +3.3V, RL = 3kΩ to 7kΩ, +3.0V to -3.0V or -3.0V to +3.0V, TA = +25°C CL = 150pF to 2500pF, MBAUD = GND 4 30 V/µsTransition-Region Slew Rate TIMING CHARACTERISTICS—MAX3222E/MAX3232E/MAX3241E/MAX3246E (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TA = TMIN to TMAX (MAX3222E/MAX3232E/ MAX3241E) (Note 6) 250 Maximum Data Rate RL = 3kΩ, CL = 1000pF, one transmitter switching TA = + 25°C ( M AX 3246E ) 250 kbps tPHL 0.15 Receiver Propagation Delay tPLH Receiver input to receiver output, CL = 150pF 0.15 µs Receiver Output Enable Time Normal operation (except MAX3232E) 200 ns Receiver Output Disable Time Normal operation (except MAX3232E) 200 ns Transmitter Skew |tPHL - tPLH| (Note 7) 100 ns Receiver Skew |tPHL - tPLH| 50 ns Transition-Region Slew Rate V C C = + 3.3V , TA = + 25°C , RL = 3kΩ to 7kΩ , m easur ed fr om + 3.0V to - 3.0V or - 3.0V to + 3.0V , one tr ansm i tter sw i tchi ng CL = 150pF to 1000pF 6 30 V/µs 4 Maxim Integrated MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 0 1000 2000 3000 4000 5000 MAX3222E/MAX3232E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE M A X 3 2 3 7 E t o c0 1 LOAD CAPACITANCE (pF) TR A N S M IT TE R O U TP U T V O LT A G E (V ) T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps VOUT+ VOUT- 0 6 2 4 10 8 14 12 16 0 1000 2000 3000 4000 5000 MAX3222E/MAX3232E SLEW RATE vs. LOAD CAPACITANCE M A X 3 2 3 7 E t o c0 2 LOAD CAPACITANCE (pF) S LE W R A TE ( V /µ s) +SLEW FOR DATA RATES UP TO 250kbps -SLEW 0 25 20 15 5 10 35 30 40 45 0 20001000 3000 4000 5000 MAX3222E/MAX3232E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE M A X 3 2 3 7 E t o c0 3 LOAD CAPACITANCE (pF) S U P P LY C U R R EN T (m A ) 250kbps 120kbps 20kbps T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers -6 -4 -2 0 2 4 6 0 MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND) M A X 32 37 E to c0 7 LOAD CAPACITANCE (pF) TR A N S M IT TE R O U TP U T V O LT A G E (V ) 1000 1500500 2000 2500 3000 FOR DATA RATES UP TO 250kbps 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 5 3 1 -1 -3 -5 VOUT+ VOUT- -6 -2 -4 2 0 4 6 -5 -3 1 -1 3 5 0 1000 1500500 2000 2500 3000 M A X 3 2 4 6 E t o c0 7 A LOAD CAPACITANCE (pF) TR A N S M IT TE R O U TP U T V O LT A G E (V ) VOUT- VOUT+ FOR DATA RATES UP TO 250kbps 1 TRANSMITTER 250kbps 4 TRANSMITTERS 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE -7.5 -5.0 -2.5 0 2.5 5.0 7.5 0 MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = VCC) M A X 32 37 E to c0 8 LOAD CAPACITANCE (pF) TR A N S M IT TE R O U TP U T V O LT A G E (V ) 500 1000 1500 2000 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD, EACH OUTPUT 2Mbps 1.5Mbps 1Mbps 2Mbps 1Mbps 1.5Mbps __________________________________________Typical Operating Characteristics (VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 0 1000 2000 3000 4000 5000 MAX3241E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE M A X 3 2 3 7 E t o 0 4 LOAD CAPACITANCE (pF) TR A N S M IT TE R O U TP U T V O LT A G E (V ) 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps VOUT+ VOUT- 0 30 20 10 40 50 60 0 20001000 3000 4000 5000 MAX3241E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE M A X 3 2 3 7 E t o c0 6 LOAD CAPACITANCE (pF) S U P P LY C U R R EN T (m A ) 250kbps 120kbps 20kbps 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 0 4 2 8 6 12 10 14 0 1000 2000 3000 4000 5000 MAX3241E SLEW RATE vs. LOAD CAPACITANCE M A X 3 2 3 7 E t o c0 5 LOAD CAPACITANCE (pF) S LE W R A TE ( V /µ s) Maxim Integrated 5 MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) 0 20 60 40 80 100 0 MAX3237E TRANSMITTER SKEW vs. LOAD CAPACITANCE (MBAUD = VCC) M A X 32 37 E to c1 2 LOAD CAPACITANCE (pF) 1000 1500500 2000 TR A N S M IT TE R S K EW ( ns ) |tPLH - tPHL| 1 TRANSMITTER AT 500kbps 4 TRANSMITTERS AT 1/16 DATA RATE ALL TRANSMITTERS LOADED WITH 3kΩ + CL -6 -2 -4 2 0 4 6 -3 -5 1 -1 3 5 2.0 3.0 3.52.5 4.0 4.5 5.0 M A X 32 37 E to c1 3 SUPPLY VOLTAGE (V) TR A N S M IT TE R O U TP U T V O LT A G E (V ) VOUT- VOUT+ 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + 1000pF MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (MBAUD = GND) 0 10 20 30 40 50 2.0 MAX3237E SUPPLY CURRENT vs. SUPPLY VOLTAGE (MBAUD = GND) M A X 32 37 E to c1 4 SUPPLY VOLTAGE (V) S U P P LY C U R R EN T (m A ) 3.0 3.52.5 4.0 4.5 5.0 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ AND 1000pF MAX3246E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE M A X 3 2 3 7 E t o c1 5 LOAD CAPACITANCE (pF) TR A N S M IT TE R O U TP U T V O LT A G E (V ) 400030001000 2000 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 -6 0 5000 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps VOUT- VOUT+ 4 6 8 10 12 14 16 0 MAX3246E SLEW RATE vs. LOAD CAPACITANCE M A X 32 37 E to c1 6 LOAD CAPACITANCE (pF) S LE W R A TE ( V /µ s) 2000 30001000 4000 5000 SR+ SR- 0 10 20 30 40 50 60 0 MAX3246E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE M A X 32 37 E to c1 7 LOAD CAPACITANCE (pF) S U P P LY C U R R EN T (m A ) 1000 2000 3000 4000 5000 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 55 45 35 25 15 5 250kbps 120kbps 20kbps 0 2 4 6 8 10 12 0 MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = GND) M A X 32 37 E to c0 9 LOAD CAPACITANCE (pF) S LE W R A TE ( V /µ s) 1000 1500500 2000 2500 3000 SR+ SR- 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 0 10 20 30 50 40 60 70 0 MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = VCC) M A X 32 37 E to c1 0 LOAD CAPACITANCE (pF) S LE W R A TE ( V /µ s) 500 1000 1500 2000 -SLEW, 1Mbps +SLEW, 1Mbps 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD EACH OUTPUT -SLEW, 2Mbps +SLEW, 2Mbps 0 10 20 30 40 50 0 MAX3237E SUPPLY CURRENT vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA (MBAUD = GND) M A X 32 37 E to c1 1 LOAD CAPACITANCE (pF) S U P P LY C U R R EN T (m A ) 1000 1500500 2000 2500 3000 250kbps 120kbps 20kbps 1 TRANSMITTER AT 20kbps, 120kbps, 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 6 Maxim Integrated MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers *These pins have an active positive feedback resistor internal to the MAX3237E, allowing unused inputs to be left unconnected. Pin Description PIN MAX3222E MAX3232E MAX3241E TQFN SO/ DIP TSSOP/ SSOP TQFN SO/DIP/ SSOP/ 16-PIN TSSOP 20-PIN TSSOP MAX3237E SSOP/ SO/ TSSOP TQFN MAX3246E NAME FUNCTION 19 1 1 — — — 13* 23 22 B3 EN Receiver Enable. Active low. 1 2 2 16 1 2 28 28 28 F3 C1+ Positive Terminal of Voltage-Doubler Charge- Pump Capacitor 20 3 3 15 2 3 27 27 27 F1 V+ +5.5V Generated by the Charge Pump 2 4 4 1 3 4 25 24 23 F4 C1- Negative Terminal of Voltage-Doubler Charge- Pump Capacitor 3 5 5 2 4 5 1 1 29 E1 C2+ Positive Terminal of Inverting Charge-Pump Capacitor 4 6 6 3 5 6 3 2 30 D1 C2- Negative Terminal of Inverting Charge-Pump Capacitor 5 7 7 4 6 7 4 3 31 C1 V- -5.5V Generated by the Charge Pump 6, 15 8, 15 8, 17 5, 12 7, 14 8, 17 5, 6, 7, 10, 12 9, 10, 11 6, 7, 8 F6, E6, D6 T_OUT RS-232 Transmitter Outputs 7, 14 9, 14 9, 16 6, 11 8, 13 9, 16 8, 9, 11 4–8 1–5 A4, A5, A6, B6, C6 R_IN RS-232 Receiver Inputs 8, 13 10, 13 10, 15 7, 10 9, 12 12, 15 18, 20, 21 15–19 13, 14, 15, 17, 18 C2, B1, A1, A2, A3 R_OUT TTL/CMOS Receiver Outputs 10, 11 11, 12 12, 13 8, 9 10, 11 13, 14 17*, 19*, 22*, 23*, 24* 12, 13, 14 10, 11, 12 E3, E2, D2 T_IN TTL/CMOS Transmitter Inputs Maxim Integrated 7 MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Pin Description (continued) PIN MAX3222E MAX3232E MAX3241E TQFN SO/ DIP TSSOP/ SSOP TQFN SO/DIP/ SSOP/ 16-PIN TSSOP 20-PIN TSSOP MAX3237E SSOP/ SO/ TSSOP TQFN MAX3246E NAME FUNCTION 16 16 18 13 15 18 2 25 24 F5 GND Ground 17 17 19 14 16 19 26 26 26 F2 VCC +3.0V to +5.5V Supply Voltage 18 18 20 — — — 14* 22 21 B2 SHDN Shutdown Control. Active low. 9, 12 — 11, 14 — — 1, 10, 11, 20 — — 9, 16, 25, 32 C3, D3, B4, C4, D4, E4, B5, C5, D5, E5 N.C. No Connection. For MAX3246E, these locations are not populated with solder bumps. — — — — — — 15* — — — MBAUD MegaBaud Control Input. Connect to GND for normal operation; connect to VCC for 1Mbps transmission rates. — — — — — — 16 20, 21 19, 20 — R_OUTB Noninverting Complementary Receiver Outputs. Always active. — — — — — — — — — — EP Exposed Pad. Solder the exposed pad to the ground plane or leave unconnected (for TQFN only). 8 Maxim Integrated MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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Detailed Description Dual Charge-Pump Voltage Converter The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E’s internal power supply consists of a regu- lated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump) over the +3.0V to +5.5V VCC range. The charge pump operates in discontinuous mode; if the output voltages are less than 5.5V, the charge pump is enabled, and if the output voltages exceed 5.5V, the charge pump is disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies (Figure 1). RS-232 Transmitters The transmitters are inverting level translators that con- vert TTL/CMOS-logic levels to ±5V EIA/TIA-232-compli- ant levels. The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E transmitters guarantee a 250kbps data rate with worst-case loads of 3kΩ in parallel with 1000pF, providing compatibility with PC-to-PC communication software (such as LapLink™). Transmitters can be par- alleled to drive multiple receivers or mice. The MAX3222E/MAX3237E/MAX3241E/MAX3246E transmitters are disabled and the outputs are forced into a high-impedance state when the device is in shut- down mode (SHDN = GND). The MAX3222E/ MAX3232E/MAX3237E/MAX3241E/MAX3246E permit the outputs to be driven up to ±12V in shutdown. The MAX3222E/MAX3232E/MAX3241E/MAX3246E transmitter inputs do not have pullup resistors. Connect unused inputs to GND or VCC. The MAX3237E’s trans- mitter inputs have a 400kΩ active positive-feedback resistor, allowing unused inputs to be left unconnected. MAX3237E MegaBaud Operation For higher-speed serial communications, the MAX3237E features MegaBaud operation. In MegaBaud operating mode (MBAUD = VCC), the MAX3237E transmitters guarantee a 1Mbps data rate with worst-case loads of 3kΩ in parallel with 250pF for +3.0V < VCC < +4.5V. For +5V ±10% operation, the MAX3237E transmitters guarantee a 1Mbps data rate into worst-case loads of 3kΩ in parallel with 1000pF. RS-232 Receivers The receivers convert RS-232 signals to CMOS-logic output levels. The MAX3222E/MAX3237E/MAX3241E/ MAX3246E receivers have inverting three-state outputs. Drive EN high to place the receiver(s) into a high- impedance state. Receivers can be either active or inactive in shutdown (Table 1). MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E 5kΩ R_ INR_ OUT C2- C2+ C1- C1+ V- V+ VCC C4 C3C1 C2 0.1µF VCC T_ OUTT_ IN GND 7kΩ 150pF MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E 5kΩ R_ INR_ OUT C2- C2+ C1- C1+ V- V+ VCC C4 C3C1 C2 0.1µF VCC T_ OUTT_ IN GND 3kΩ 1000pF (2500pF, MAX3237E only) MINIMUM SLEW-RATE TEST CIRCUIT MAXIMUM SLEW-RATE TEST CIRCUIT Figure 1. Slew-Rate Test Circuits ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers LapLink is a trademark of Traveling Software. Maxim Integrated 9 MAX3222E/MAX3232E/MAX3237E/ MAX3241E/MAX3246E

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