MAX3222/MAX3232/MAX3237/MAX3241 - 3.0V to 5.5V, …

1 Click here for production status of specific part numbers. max3222 / max3232 / to , Low-Power, Up to 1 Mbps, max3237 / max3241 * True RS-232 Transceivers General Description Benefits and Features The MAX3222/MAX3232/MAX3237/MAX3241 transceivers Integrated Features Saves Board Space and have a proprietary low-dropout transmitter output stage Simplifies Design enabling true RS-232 performance from a to Charge Pump Circuitry Eliminates the Need for a supply with a dual charge pump. The devices require only Bipolar 12V Supply four small F external charge-pump capacitors. The Wide Single-Supply Operation From +3V to + max3222 , max3232 , and max3241 are guaranteed to Supply run at data rates of 120kbps while maintaining RS-232 Always-On Extra Outputs Enable Monitoring of output levels. The max3237 is guaranteed to run at data External Devices rates of 250kbps in normal operating mode and 1 Mbps in Power Saving Extends Battery Life the MegaBaud operating mode.

2 1 A Supply Current in Shutdown Mode While The max3222 / max3232 have 2 receivers and 2 drivers. receiver is Active ( max3222 , max3237 , max3241 ). The max3222 and max3232 are pin, package, and func- Ordering Information tionally compatible with the industry-standard MAX242. and MAX232, respectively. PIN- PKG. PART TEMP RANGE. PACKAGE CODE. The max3241 has 5 receivers and 3 drivers, while the max3237 has 3 receivers and 5 drivers. Receivers R1 max3222 CUP+ 0 C to +70 C 20 TSSOP U20+2. ( max3237 / max3241 ) and R2 ( max3241 ) have extra max3222 CAP+ 0 C to +70 C 20 SSOP A20+1. outputs in addition to their standard outputs. These extra max3222 CWN+ 0 C to +70 C 18 SO W18+1. outputs are always active, allowing external devices to be max3222 CPN+ 0 C to +70 C 18 Plastic Dip P18+5. monitored without forward biasing the protection diodes in circuitry that may have VCC completely removed.

3 +Denotes lead-free package. The max3222 , max3232 , and max3241 are available in Pin Configurations space-saving TSSOP and SSOP packages with operating temperatures of either -40 C to +85 C or 0 C to 70 C. TOP VIEW. EN 1 18 SHDN. Applications C1+ 2 17 VCC. Battery-Powered Equipment V+ 3 16 GND. Hand-Held Equipment Peripherals C1- 4 15 T1 OUT. max3222 . Datacom Equipment C2+ 5 14 R1IN. C2- 6 13 R1 OUT. V- 7 12 T1IN. T2 OUT 8 11 T2IN. R2IN 9 10 R2 OUT. 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 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; 5/19. max3222 / max3232 / to , Low-Power, Up to 1 Mbps, max3237 / max3241 True RS-232 Transceivers Absolute Maximum Ratings to +6V Continuous Power Dissipation (TA = +70 C).

4 V+ (Note 1).. to +7V 16-Pin TSSOP (derate C above +70 C)..533mW. V- (Note 1)..+ to -7V 16-Pin Narrow SO (derate C above +70 C)..696mW. V+ + V- (Note 1)..+13V 16-Pin Wide SO (derate C above +70 C)..762mW. Input Voltages 16-Pin Plastic DIP (derate C above +70 C)..842mW. T_IN, SHDN, to +6V 18-Pin SO (derate C above +70 C)..762mW. to (VCC + ) 18-Pin Plastic DIP (derate C above +70 C)..889mW. 25V 20-Pin SSOP (derate C above +70 C)..559mW. Output Voltages 20-Pin TSSOP (derate C above +70 C)..640mW. 28-Pin TSSOP (derate C above +70 C)..696mW. to (VCC + ) 28-Pin SSOP (derate C above +70 C)..762mW. Short-Circuit Duration 28-Pin SO (derate C above +70 C)..1W. Operating Temperature Ranges MAX32_ _C_ C to +70 C. MAX32_ _E_ _ .. -40 C to +85 C. Storage Temperature -65 C to +150 C. Lead Temperature (soldering, 10s).. +300 C. Note 1: V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.

5 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 (VCC = + to + , C1 C4 = F (Note 2), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25 C.). PARAMETER CONDITIONS MIN TYP MAX UNITS. DC CHARACTERISTICS. max3222 / max3232 /. No load, VCC = or , VCC Power-Supply Current max3241 mA. TA = +25 C. max3237 Shutdown Supply Current SHDN = GND, TA = +25 C 10 A. LOGIC INPUTS AND receiver OUTPUTS. Input Logic Threshold Low T_IN, EN, SHDN, MBAUD V. (Note 3). Input Logic Threshold High VCC = V.

6 (Note 3) VCC = Input Leakage Current T_IN, EN, SHDN, MBAUD A. Output Leakage Current Receivers disabled 10 A. Output Voltage Low IOUT = V. VCC - VCC. Output Voltage High IOUT = V. - receiver INPUTS. Input Voltage Range -25 25 V. VCC = Input Threshold Low TA = +25 C V. VCC = VCC = Input Threshold High TA = +25 C V. VCC = Maxim Integrated 2. max3222 / max3232 / to , Low-Power, Up to 1 Mbps, max3237 / max3241 True RS-232 Transceivers Electrical Characteristics (continued). (VCC = + to + , C1 C4 = F (Note 2), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25 C.). PARAMETER CONDITIONS MIN TYP MAX UNITS. Input Hysteresis V. Input Resistance TA = +25 C 3 5 7 k . TRANSMITTER OUTPUTS. Output Voltage Swing All transmitter outputs loaded with 3k to ground V. Output Resistance VCC = V+ = V- = 0V, VOUT = 2V 300 10M . Output Short-Circuit Current 35 60 mA.

7 VOUT = 12V, VCC = 0V or 3V to , transmitters Output Leakage Current 25 A. disabled MOUSE DRIVEABILITY ( max3241 ). T1IN = T2IN = GND, T3IN = VCC, Transmitter Output Voltage T3 OUT loaded with 3k to GND, V. T1 OUT and T2 OUT loaded with each Timing Characteristics max3222 / max3232 / max3241 . (VCC = + to + , C1 C4 = F (Note 2), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25 C.). PARAMETER CONDITIONS MIN TYP MAX UNITS. Maximum Data Rate RL = 3k , CL = 1000pF, one transmitter switching 120 235 kbps tPHL receiver Propagation Delay R_IN to R_OUT, CL = 150pF s tPLH receiver Output Enable Time Normal operation 200 ns receiver Output Disable Time Normal operation 200 ns Transmitter Skew | tPHL - tPLH | 300 ns receiver Skew | tPHL - tPLH | 300 ns VCC = , RL = 3k to 7k , CL = 150pF to 1000pF 6 30. +3V to -3V or -3V to +3V, Transition-Region Slew Rate V/ s TA = +25 C, one transmitter switching CL = 150pF to 2500pF 4 30.

8 Maxim Integrated 3. max3222 / max3232 / to , Low-Power, Up to 1 Mbps, max3237 / max3241 True RS-232 Transceivers Timing Characteristics max3237 . (VCC = + to + , C1 C4 = F (Note 2), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25 C.). PARAMETER CONDITIONS MIN TYP MAX UNITS. RL = 3k , CL = 1000pF, one transmitter switching, 250. MBAUD = GND. VCC = to , RL = 3k , CL = 250pF, Maximum Data Rate 1000 kbps one transmitter switching, MBAUD = VCC. VCC = to , RL = 3k , CL = 1000pF, 1000. one transmitter switching, MBAUD = VCC. tPHL receiver Propagation Delay R_IN to R_OUT, CL = 150pF s tPLH receiver Output Enable Time Normal operation 200 ns receiver Output Disable Time Normal operation 200 ns | tPHL - tPLH |, MBAUD = GND 100 ns Transmitter Skew | tPHL - tPLH |, MBAUD = VCC 25 ns receiver Skew | tPHL - tPLH | 50 ns MBAUD =. 6 30. CL = 150pF GND.

9 VCC = , RL = 3 to 7k , to 1000pF MBAUD =. Transition-Region Slew Rate +3V to -3V or -3V to +3V, 24 150 V/ s VCC. TA = +25 C. CL = 150pF to 2500pF, 4 30. MBAUD = GND. Note 2: max3222 / max3232 / max3241 : C1 C4 = F tested at 10%; C1 = F, C2 C4 = F tested at 10%. max3237 : C1 C4 = F tested at 5%; C1 C4 = F tested at 10%; C1 = F, C2 C4 = F. tested at 10%. Note 3: Transmitter input hysteresis is typically 250mV. Typical Operating Characteristics (VCC = + , 235kbps data rate, F capacitors, all transmitters loaded with 3k , TA = +25 C, unless otherwise noted.). max3222 / max3232 max3222 / max3232 max3222 / max3232 . TRANSMITTER OUTPUT VOLTAGE SLEW RATE SUPPLY CURRENT vs. LOAD CAPACITANCE. vs. LOAD CAPACITANCE vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA. 6 22 40. max3222 -01. max3222 -02. max3222 -03. 5 VOUT+ 20 FOR DATA RATES UP TO 235kbps TRANSMITTER OUTPUT VOLTAGE (V).

10 35. 4 18 235kbps 3 30. SUPPLY CURRENT (mA). 16. SLEW RATE (V/ s). 2. 14 25. 1 -SLEW. 12 120kbps 0 20. 10. -1 +SLEW. 8 15. -2 20kbps -3 6 10. -4 4. VOUT- 5. -5 2. -6 0 0. 0 1000 2000 3000 4000 5000 150 1000 2000 3000 4000 5000 0 1000 2000 3000 4000 5000. LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF). Maxim Integrated 4. max3222 / max3232 / to , Low-Power, Up to 1 Mbps, max3237 / max3241 True RS-232 Transceivers Typical Operating Characteristics (continued). (VCC = + , 235kbps data rate, F capacitors, all transmitters loaded with 3k , TA = +25 C, unless otherwise noted.). max3241 max3241 max3241 . TRANSMITTER OUTPUT VOLTAGE SLEW RATE SUPPLY CURRENT vs. LOAD. vs. LOAD CAPACITANCE vs. LOAD CAPACITANCE CAPACITANCE WHEN TRANSMITTING DATA. max3222 -04 24 45. max3222 -05. max3222 -06. VOUT+ 235kbps 22. TRANSMITTER OUTPUT VOLTAGE (V). 40. 20 35.