Click here for production status of specific part numbers. MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers General Description The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available. The MAX225, MAX233, MAX235, and MAX245/MAX246/ MAX247 use no external components and are recommended for applications where printed circuit board space is critical.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Absolute Maximum Ratings—MAX220/222/232A/233A/242/243 16-Pin Narrow SO (derate 8.70mW/°C above +70°C).....696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)......800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C).............640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).......800mW 18-Pin CERDIP (derate 10.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued) (VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued) (VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3) PARAMETER CONDITIONS MIN TYP MAX tPHLR, Figure 2 MAX222/MAX232A/MAX233/ MAX242/MAX243 0.5 1 MAX220 0.6 3 tPLHR, Figure 2 MAX222/MAX232A/MAX233/ MAX242/MAX243 0.6 1 MAX220 0.8 3 MAX242 0.5 10 MAX242 2.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Absolute Maximum Ratings—MAX223/MAX230–MAX241 (Voltages referenced to GND.) VCC...........................................................................-0.3V to +6V V+............................................................... (VCC - 0.3V) to +14V V- ............................................................................+0.3V to -14V Input Voltages TIN......................................................... -0.3V to (VCC + 0.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX223/MAX230–MAX241 (continued) (MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10%; MAX233/MAX235, VCC = +5V ±5%‚ C1–C4 = 1.0μF; MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Typical Operating Characteristics MAX223/MAX230–MAX241 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 7.2 3 TRANSMITTERS LOADED TA = +25°C C1–C4 = 1µF TRANSMITTER 4 TRANSMITTERS LOADS = LOADED 3kΩ || 2500pF 5.0 6.6 6.4 6.2 6.0 5.5 VCC (V) -6.5 TA = +25°C C1–C4 = 1µF TRANSMITTER LOADS = 3kΩ || 2500pF -7.5 -8.0 1 TRANSMITTER LOADED 2 TRANSMITTERS LOADED -8.5 -9.0 4.5 -6.0 -6.4 -6.6 4.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Absolute Maximum Ratings—MAX225/MAX244–MAX249 Continuous Power Dissipation (TA = +70°C) 28-Pin Wide SO (derate 12.50mW/°C above +70°C).........1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C).611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C).........1.07W Operating Temperature Ranges MAX225C_ _, MAX24_C_ _................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ...........................
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX225/MAX244–MAX249 (continued) (MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1μF; TA = TMIN to TMAX; unless otherwise noted.) (Note 7) PARAMETER CONDITIONS MIN TYP MAX MAX225 4.75 5.25 MAX244–MAX249 4.5 5.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Typical Operating Characteristics MAX225/MAX244–MAX249 EXTERNAL POWER SUPPLY 1µF CAPACITORS 12 10 40kb/s DATA RATE 8 TRANSMITTERS LOADED WITH 3kΩ 8 6 4 VCC = +5V EXTERNAL CHARGE PUMP 1µF CAPACITORS 8 TRANSMITTERS DRIVING 5kΩ AND 2000pF AT 20kb/s 2 0 -2 -4 4 V- LOADED -8 0 1 2 3 LOAD CAPACITANCE (nF) www.maximintegrated.com 4 5 -10 5 10 15 20 8.0 25 LOAD CURRENT (mA) 30 7.5 40kb/s 7.0 60kb/s 6.5 6.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Test Circuits/Timing Diagrams +3V 0V* INPUT +3V INPUT 50% 50% 50% 50% 0V OUTPUT GND V+ 0V V- OUTPUT tPLHT VCC tPLHR tPLHS tPHLR tPHLS tPHLT *EXCEPT FOR R2 ON THE MAX243 WHERE -3V IS USED. Figure 1. Transmitter Propagation-Delay Timing EN RX IN RX a) TEST CIRCUIT EN INPUT RX OUT 1kΩ VCC - 2V Figure 2.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Control Pin Configuration Tables Table 1a. MAX245 Control Pin Configurations ENT ENR 0 0 Normal Operation 0 1 1 0 1 1 OPERATION STATUS TRANSMITTERS RECEIVERS All Active All Active Normal Operation All Active All High-Z Shutdown All High-Z All Low-Power Receive Mode Shutdown All High-Z All High-Z Table 1b.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Table 1d.
MAX220–MAX249 Detailed Description The MAX220–MAX249 contain four sections: dual chargepump DC-DC voltage converters, RS-232 drivers, RS-232 receivers, and receiver and transmitter enable control inputs. Dual Charge-Pump Voltage Converter The MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the V+ output.
MAX220–MAX249 The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors with nominal 5kΩ values. The receivers implement Type 1 interpretation of the fault conditions of V.28 and EIA/TIA-232E. The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear output transitions with slow-moving input signals, even with moderate amounts of noise and ringing.
MAX220–MAX249 Tables 1a–1d define the control states. The MAX244 has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA) causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB) causes the four B-side drivers and receivers to go into a threestate mode.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V INPUT TOP VIEW C3 C5 C1+ 1 + 16 VCC V+ 2 C2- 5 C1 15 GND C1- 3 C2+ 4 14 T1OUT MAX220 MAX232 MAX232A C2 13 R1IN +5V 400kΩ 11 T1IN 12 R1OUT V- 6 11 T1IN T2OUT 7 10 T2IN 9 R2IN 8 TTL/CMOS INPUTS R2OUT DIP/SO DEVICE MAX220 MAX232 MAX232A 16 VCC C1+ V+ 2 +10V +5V TO +10V 3 C1VOLTAGE DOUBLER 4 6 -10V C2+ +10V TO -10V V5 C2- VOLTAGE INVERTER C4 1 T1OUT 14 +5V 400kΩ 10 T2IN 12 R1OUT TTL/CMOS OUTPUTS CAPACITANCE (µF)
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 0.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 12 C1+ 1.0µF 14 C115 C2+ 1.0µF 16 C2- +5V INPUT 11 VCC +5V TO +10V VOLTAGE DOUBLER V+ +10V TO -10V VOLTAGE INVERTER V- 13 1.0µF 17 1.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW T3OUT 1 1.0µF + 20 T4OUT T1OUT 2 19 T5IN T2OUT 3 18 N.C. T2IN 4 T1IN 5 +5V INPUT 1.0µF 1.0µF +5V 15 T4IN VCC 7 14 T3IN C1+ 8 13 V- V+ 9 12 C2- C1- 10 11 C2+ 400kΩ 4 T2IN T2OUT 3 T2 +5V 400kΩ 14 T3IN T3OUT 1 T3 +5V 400kΩ 15 T4IN +5V DIP/SO 1.0µF T1OUT 2 T1 +5V TTL/CMOS INPUTS 1.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V INPUT 1.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 10 1.0µF 12 13 1.0µF 14 +5V INPUT 9 VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1C2+ C2- 24 T4OUT T1OUT 2 23 R2IN T2OUT 3 22 R2OUT 21 SHDN R1IN 4 R1OUT 5 MAX236 20 EN T2IN 6 19 T4IN T1IN 7 18 T3IN GND 8 17 R3OUT VCC 9 16 R3IN C1+ 10 15 V- V+ 11 14 C2- C1- 12 13 C2+ RS-232 OUTPUTS 400kΩ 18 T3IN T3OUT 1 T3 +5V 19 T4IN 5 R1OUT 1.0µF T2OUT 3 T2 +5V 15 400kΩ 6 T2IN TTL/CMOS INPUTS 1.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 10 1.0µF 12 13 1.0µF 14 +5V INPUT 9 VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1C2+ 1.0µF V+ V- +10V TO -10V VOLTAGE INVERTER C2- 11 15 1.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 10 1.0µF 12 13 1.0µF 14 +5V INPUT 1.0µF 9 VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1C2+ V+ V- +10V TO -10V VOLTAGE INVERTER C2- 11 15 1.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW +7.5V TO +13.2V INPUT +5V INPUT 1.0µF 5 4 6 1.0µF 7 VCC C1+ V+ V- +10V TO -10V VOLTAGE INVERTER C1- 8 1.0µF +5V 400kΩ R1OUT 1 24 T1IN + 23 T2IN GND 3 22 R2OUT 21 R2IN VCC 4 V+ 5 +5V 24 T1IN R1IN 2 MAX239 19 T1OUT C- 7 18 R3IN V- 8 17 R3OUT R5IN 9 16 T3IN R5OUT 10 15 N.C.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers 1.0µF TOP VIEW 25 19 VCC +5V TO +10V VOLTAGE DOUBLER C1+ 1.0µF 27 C128 C2+ 1.0µF 29 C2- +5V INPUT +5V TO -10V VOLTAGE INVERTER +5V +5V N.C. R2IN N.C. T2OUT T1OUT T3OUT T4OUT R3IN R3OUT T5IN N.C. 11 10 9 8 7 6 5 4 3 2 1 12 13 14 15 16 17 18 19 20 21 22 MAX240 44 43 42 41 40 39 38 37 36 35 34 N.C. SHDN EN T5OUT R4IN R4OUT T4IN T3IN R5OUT R5IN N.C. T2 T3 2 T5IN 16 R1OUT N.C. N.C. C1+ V+ C1C2+ C2 VN.C. N.C. N.C.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 0.1µF 1 0.1µF C1+ 1 + V+ 2 15 GND 14 T1OUT C2+ 4 4 16 VCC C1- 3 MAX243 0.1µF C2+ C2- 16 VCC +5V TO +10V VOLTAGE DOUBLER 11 T1IN T2OUT 7 10 T2IN 9 +10V 6 -10V 0.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF 1µF 20 VCC +5V TO +10V VOLTAGE DOUBLER 2 1 1µF RB5IN TA1OUT 3 TB4OUT TA2OUT 4 TB3OUT TA3OUT 5 TB2OUT TA4OUT 6 TB1OUT RA4IN RA5IN 21 1µF 44 43 42 41 40 RA3IN 7 39 RB4IN RA2IN 8 38 RB3IN RA1IN 9 37 RB2IN RA1OUT 10 36 RB1IN RA2OUT 11 35 RB1OUT RA3OUT 12 RA4OUT 13 33 RB3OUT RA5OUT 14 32 RB4OUT TA1IN 15 31 RB5OUT TA2IN 16 30 TB1IN TA3IN 17 29 TB2IN MAX244 TB3IN TB4IN V-
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF ENR 1 + 40 VCC TA1IN 2 39 ENT TA2IN 3 38 TB1IN TA3IN 4 37 TB2IN TA4IN 5 36 TB3IN RA5OUT 6 35 TB4IN RA4OUT 7 34 RB5OUT RA3OUT 8 33 RB4OUT RA2OUT 9 32 RB3OUT RA1OUT 10 31 RB2OUT RA1IN 11 30 RB1OUT RA2IN 12 29 RB1IN RA3IN 13 28 RB2IN RA4IN 14 27 RB3IN RA5IN 15 26 RB4IN TA1OUT 16 25 RB5IN TA2OUT 17 24 TB1OUT TA3OUT 18 23 TB2OUT TA4OUT 19 22 TB3OUT GN
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF + 40 VCC 2 39 ENB TA2IN 3 38 TB1IN TA3IN 4 37 TB2IN TA4IN 5 36 TB3IN RA5OUT 6 35 TB4IN RA4OUT 7 34 RB5OUT RA3OUT 8 33 RB4OUT ENA 1 TA1IN MAX246 RA2OUT 9 32 RB3OUT RA1OUT 10 31 RB2OUT RA1IN 11 30 RB1OUT RA2IN 12 29 RB1IN RA3IN 13 28 RB2IN RA4IN 14 27 RB3IN RA5IN 15 26 RB4IN TA1OUT 16 25 RB5IN TA2OUT 17 24 TB1OUT TA3OUT 18 23 TB2OUT TA4OUT 19 22 TB
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF + 40 VCC 2 39 ENTB TA2IN 3 38 TB1IN TA3IN 4 37 TB2IN TA4IN 5 36 TB3IN RB5OUT 6 35 TB4IN RA4OUT 7 34 RB4OUT RA3OUT 8 33 RB3OUT RA2OUT 9 32 RB2OUT RA1OUT 10 31 RB1OUT ENRA 11 30 ENRB RA1IN 12 29 RB1IN RA2IN 13 28 RB2IN RA3IN 14 27 RB3IN RA4IN 15 26 RB4IN TA1OUT 16 25 RB5IN TA2OUT 17 24 TB1OUT TA3OUT 18 23 TB2OUT TA4OUT 19 22 TB3OUT GND 20 21 TB4OUT
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW +5V 1µF 2 1 1µF 1µF 44 43 42 41 40 RA2IN 7 39 RB3IN RA1IN 8 38 RB2IN ENRA 9 37 RB1IN RA1OUT 10 36 ENRB RA2OUT 11 35 RB1OUT RA3OUT 12 RA4OUT 13 33 RB3OUT TA1IN 14 32 RB4OUT TA2IN 15 31 TB1IN TA3IN 16 30 TB2IN TA4IN 17 29 TB3IN MAX248 34 RB2OUT TB4IN ENTB V- C2- C2+ C1- V+ C1+ VCC 19 20 21 22 23 24 25 26 27 28 GND ENTA C1+ 23 C124 C2+ 25 C2- VCC +5V TO +10V VOLTAGE DOUBLER PLCC 1
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF 2 1 1µF RB4IN TA1OUT 3 1µF 44 43 42 41 40 + RA2IN 7 39 RB3IN 8 38 RB2IN ENRA 9 37 RB1IN RA1OUT 10 36 ENRB 35 RB1OUT RA2OUT 11 RA3OUT 12 RA4OUT 13 33 RB3OUT RA5OUT 14 32 RB4OUT TA1IN 15 31 RB5OUT TA2IN 16 30 TB1IN TA3IN 17 29 TB2IN MAX249 34 RB2OUT TB3IN ENTB V- C2- C2+ C1- V+ C1+ VCC 19 20 21 22 23 24 25 26 27 28 GND ENTA C1+ 23 C124 C2+ 25 C2- VCC +5V TO +10V VOLTAGE D
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Ordering Information PART TEMP RANGE PIN-PACKAGE PART TEMP RANGE PIN-PACKAGE -40°C to +85°C 16 Wide SO MAX220CPE+ 0°C to +70°C 16 Plastic DIP MAX231EWE+ MAX220CSE+ 0°C to +70°C 16 Narrow SO MAX231EJD -40°C to +85°C 14 CERDIP MAX220CWE+ 0°C to +70°C 16 Wide SO MAX231MJD 55°C to +125°C 14 CERDIP Dice* MAX232CPE+ 0°C to +70°C 16 Plastic DIP 16 Plastic DIP MAX232CSE+ 0°C to +70°C 16 Narrow SO 0°C to +70°C 16 Wide
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE PART TEMP RANGE PIN-PACKAGE MAX234EWE+ -40°C to +85°C 16 Wide SO MAX240CMH+ 0°C to +70°C 44 Plastic FP MAX234EJE -40°C to +85°C 16 CERDIP MAX240C/D 0°C to +70°C Dice* MAX234MJE 55°C to +125°C 16 CERDIP MAX241CAI+ 0°C to +70°C 28 SSOP MAX235CPG+ 0°C to +70°C 24 Wide Plastic DIP MAX241CWI+ 0°C to +70°C 28 Wide SO MAX235EPG+ -40°C to +85°C 24 Wide Plast
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX247CPL+ 0°C to +70°C 40 Plastic DIP MAX247C/D 0°C to +70°C Dice* MAX247EPL+ -40°C to +85°C MAX248CQH+ 0°C to +70°C 40 Plastic DIP 44 PLCC MAX248C/D 0°C to +70°C Dice* MAX248EQH+ -40°C to +85°C 44 PLCC MAX249CQH+ 0°C to +70°C 44 PLCC MAX249EQH+ -40°C to +85°C 44 PLCC +Denotes a lead(Pb)-free/RoHS-compliant package.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 15 1/06 Added part information to the lead temperature in the Absolute Maximum Ratings sections 16 7/10 Changed multiple packages to lead-free versions; updated/added notes 3, 4, 5, 7, and 8 to the Electrical Characteristics table; removed incorrect subscripting from all pin names in the Electrical Characteristics table and Pin Configurations 17 1/15 Updated General Desc