19-4323; Rev 16; 7/10 +5V-Powered, Multichannel RS-232 Drivers/Receivers Next-Generation Device Features 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. These parts are especially useful in battery-powered systems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225, MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for applications where printed circuit board space is critical. ♦ For Low-Voltage, Integrated ESD Applications MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E: +3.0V to +5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors (MAX3246E Available in a UCSP™ Package) ♦ For Low-Cost Applications MAX221E: ±15kV ESD-Protected, +5V, 1µA, Single RS-232 Transceiver with AutoShutdown™ ________________________Applications TEMP RANGE PIN-PACKAGE PART MAX220CPE+ 0°C to +70°C 16 Plastic DIP MAX220CSE+ 0°C to +70°C 16 Narrow SO MAX220CWE+ 0°C to +70°C 16 Wide SO MAX220C/D 0°C to +70°C Dice* MAX220EPE+ -40°C to +85°C 16 Plastic DIP MAX220ESE+ -40°C to +85°C 16 Narrow SO MAX220EWE+ -40°C to +85°C 16 Wide SO MAX220EJE -40°C to +85°C 16 CERDIP MAX220MJE -55°C to +125°C 16 CERDIP +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. Portable Computers Low-Power Modems Interface Translation Battery-Powered RS-232 Systems Multidrop RS-232 Networks AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc. Ordering Information Ordering Information continued at end of data sheet. Selection Table Part Number MAX220 MAX222 MAX223 (MAX213) MAX225 MAX230 (MAX200) MAX231 (MAX201) MAX232 (MAX202) MAX232A MAX233 (MAX203) MAX233A MAX234 (MAX204) MAX235 (MAX205) MAX236 (MAX206) MAX237 (MAX207) MAX238 (MAX208) MAX239 (MAX209) MAX240 MAX241 (MAX211) MAX242 MAX243 MAX244 MAX245 MAX246 MAX247 MAX248 MAX249 Power Supply (V) +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 No. of RS-232 Drivers/Rx 2/2 2/2 4/5 5/5 5/0 2/2 No. of Ext. Caps 4 4 4 0 4 2 Nominal Cap. Value (µF) 0.047/0.33 0.1 1.0 (0.1) — 1.0 (0.1) 1.0 (0.1) SHDN & ThreeState No Yes Yes Yes Yes No Rx Active in SHDN — — ✔ ✔ — — Data Rate (kbps) 120 200 120 120 120 120 2/2 2/2 2/2 2/2 4/0 5/5 4/3 5/3 4/4 3/5 4 4 0 0 4 0 4 4 4 2 1.0 (0.1) 0.1 — — 1.0 (0.1) — 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) No No No No No Yes Yes No No No — — — — — — — — — — 120 (64) 200 120 200 120 120 120 120 120 120 5/5 4/5 2/2 2/2 8/10 8/10 8/10 8/9 8/8 6/10 4 4 4 4 4 0 0 0 4 4 1.0 1.0 (0.1) 0.1 0.1 1.0 — — — 1.0 1.0 Yes Yes Yes No No Yes Yes Yes Yes Yes — — ✔ — — ✔ ✔ ✔ ✔ ✔ 120 120 200 200 120 120 120 120 120 120 Features Ultra-low-power, industry-standard pinout Low-power shutdown MAX241 and receivers active in shutdown Available in SO 5 drivers with shutdown Standard +5/+12V or battery supplies; same functions as MAX232 Industry standard Higher slew rate, small caps No external caps No external caps, high slew rate Replaces 1488 No external caps Shutdown, three state Complements IBM PC serial port Replaces 1488 and 1489 Standard +5/+12V or battery supplies; single-package solution for IBM PC serial port DIP or flatpack package Complete IBM PC serial port Separate shutdown and enable Open-line detection simplifies cabling High slew rate High slew rate, int. caps, two shutdown modes High slew rate, int. caps, three shutdown modes High slew rate, int. caps, nine operating modes High slew rate, selective half-chip enables Available in quad flatpack package ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX220–MAX249 General Description MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243 (Voltages referenced to GND.) VCC ...........................................................................-0.3V to +6V V+ (Note 1) ..................................................(VCC - 0.3V) to +14V V- (Note 1) ..............................................................+0.3V to -14V Input Voltages TIN .............................................................-0.3V to (VCC - 0.3V) RIN (Except MAX220) ........................................................±30V RIN (MAX220) ....................................................................±25V TOUT (Except MAX220) (Note 2) ......................................±15V TOUT (MAX220)..............................................................±13.2V Output Voltages TOUT..................................................................................±15V ROUT........................................................-0.3V to (VCC + 0.3V) Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (TA = +70°C) 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW 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 10.53mW/°C above +70°C).....842mW Operating Temperature Ranges MAX2_ _AC_ _, MAX2_ _C_ _ .............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) 20 PDIP (P20M+1) .......................................................+225°C All other lead(Pb)-free packages.................................+260°C All other packages containing lead(Pb) ......................+240°C Note 1: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V. Note 2: Input voltage measured with TOUT in high-impedance state, VSHDN or VCC = 0V. 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—MAX220/222/232A/233A/242/243 (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 All transmitter outputs loaded with 3k to GND ±5 ±8 2 1.4 MAX UNITS RS-232 TRANSMITTERS Output Voltage Swing Input Logic-Low Voltage Input Logic-High Voltage 1.4 All devices except MAX220 MAX220: VCC = +5.0V 0.8 5 40 VSHDN = 0V, MAX222/MAX242, shutdown, MAX220 ±0.01 ±1 VCC = +5.5V, VSHDN = 0V, VOUT = ±15V, MAX222/MAX242 ±0.01 ±10 ±0.01 ±10 Output Leakage Current VCC = V SHDN = 0V VOUT = ±15V MAX220, V OUT = ±12V V V 2.4 All except MAX220, normal operation Logic Pullup/lnput Current V μA μA ±25 Data Rate 200 Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V 300 10M Output Short-Circuit Current VOUT = 0V VOUT = 0V ±7 ±22 MAX220 116 kbps ±60 mA RS-232 RECEIVERS ±30 RS-232 Input Voltage Operating Range MAX220 RS-232 Input Threshold Low VCC = +5V RS-232 Input Threshold High VCC = +5V 2 ±25 All except MAX243 R2IN 0.8 MAX243 R2IN (Note 4) -3 1.3 V All except MAX243 R2IN 1.8 2.4 MAX243 R2IN (Note 4) -0.5 -0.1 _______________________________________________________________________________________ V V +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 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 All except MAX220/MAX243, VCC = +5V, no hysteresis in shutdown RS-232 Input Hysteresis MIN TYP MAX 0.2 0.5 1.0 MAX220 RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Short-Circuit Current TTL/CMOS Output Leakage Current 1 TA = +25°C (MAX220) 3 5 7 3 5 7 0.2 0.4 I OUT = 3.2mA I OUT = 1.6mA (MAX220) I OUT = -1.0mA 0.4 3.5 VCC - 0.2 Sourcing VOUT = V GND -2 -10 Sinking V OUT = VCC 10 30 VSHDN = VCC or VEN = VCC (VSHDN = 0V for MAX222), 0V VOUT VCC EN Input Threshold Low MAX242 EN Input Threshold High MAX242 2.0 Supply Voltage Range MAX220 VCC Supply Current (VSHDN = VCC), Figures 5, 6, 11, 19 3k load both inputs ±10 1.4 0.8 1.4 5.5 2 4 10 MAX220 12 MAX222/MAX232A/MAX233A/ MAX242/MAX243 15 TA = +25°C 0.1 V V mA 10 TA = 0°C to +70°C 2 50 TA = -40°C to +85°C 2 50 TA = -55°C to +125°C 35 100 ±1 μA 1.4 0.8 V SHDN Input Leakage Current MAX222/MAX242 SHDN Threshold Low MAX222/MAX242 SHDN Threshold High MAX222/MAX242 Transition Slew Rate CL = 50pF to 2500pF, MAX222/MAX232A/ RL = 3k to 7k, MAX233/MAX242/MAX243 VCC = +5V, TA = +25°C, measured from +3V to -3V or MAX220 -3V to +3V MAX222/MAX232A/ MAX233/MAX242/MAX243 MAX220 t PLHT, Figure 1 μA V 0.5 MAX222/ MAX242 Transmitter Propagation Delay TLL to RS-232 (Normal Operation) V mA MAX222/MAX232A/MAX233A/ MAX242/MAX243 Shutdown Supply Current t PHLT, Figure 1 k V ±0.05 4.5 No load V 0.3 MAX243 UNITS MAX222/MAX232A/ MAX233/MAX242/MAX243 MAX220 2.0 1.4 6 12 μA V 30 V/μs 1.5 3 30.0 1.3 3.5 4 10 1.5 3.5 5 10 μs _______________________________________________________________________________________ 3 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 TYP MAX MAX222/MAX232A/MAX233/ MAX242/MAX243 0.5 1 MAX220 0.6 3 t PLHR, Figure 2 MAX222/MAX232A/MAX233/ MAX242/MAX243 0.6 1 t PHLR, Figure 2 Receiver Propagation Delay RS-232 to TLL (Normal Operation) MIN UNITS μs MAX220 0.8 3 Receiver Propagation Delay RS-232 to TLL (Shutdown) t PHLS, Figure 2 MAX242 0.5 10 t PHLS, Figure 2 MAX242 2.5 10 Receiver-Output Enable Time t ER MAX242, Figure 3 125 500 ns Receiver-Output Disable Time tDR MAX242, Figure 3 160 500 ns Transmitter-Output Enable Time (SHDN Goes High) t ET MAX222/MAX242, 0.1μF caps (includes charge-pump start-up), Figure 4 250 μs Transmitter-Output Disable Time (SHDN Goes Low) tDT MAX222/MAX242, 0.1μF caps, Figure 4 600 ns Transmitter + to - Propagation Delay Difference (Normal Operation) t PHLT - tPLHT MAX222/MAX232A/MAX233/ MAX242/MAX243 300 MAX220 2000 MAX222/MAX232A/MAX233/ MAX242/MAX243 100 MAX220 225 Receiver + to - Propagation Delay Difference (Normal Operation) t PHLR - tPLHR μs ns ns Note 3: All units are production tested at hot. Specifications over temperature are guaranteed by design. Note 4: MAX243 R2OUT is guaranteed to be low when R2IN ≥ 0V or is unconnected. __________________________________________Typical Operating Characteristics MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243 2 0 0.1μF V- LOADED, NO LOAD ON V+ -2 1μF 0.1μF -4 ALL CAPS 1μF 9 VCC = +5.25V 8 ALL CAPS 0.1μF 7 1μF CAPS V+ VCC = +4.75V +5V +5V V+ 0.1μF CAPS SHDN 0V 0V 1μF CAPS 6 -6 V+ LOADED, NO LOAD ON V- -10 0 5 10 15 LOAD CURRENT (mA) 4 0.1μF CAPS 5 -8 20 25 V- V- -10V 4 0 10 20 30 40 50 60 500μs/div DATA RATE (kb/s) _______________________________________________________________________________________ MAX220-03 4 VCC = +5V NO LOAD ON TRANSMITTER OUTPUTS (EXCEPT MAX220, MAX233A) +10V V+, V- VOLTAGE (V) EITHER V+ OR V- LOADED 10 OUTPUT CURRENT (mA) 6 OUTPUT LOAD CURRENT FLOWS FROM V+ TO V- MAX220-02 1μF 8 11 MAX220-01 10 MAX222/MAX242 ON-TIME EXITING SHUTDOWN AVAILABLE OUTPUT CURRENT vs. DATA RATE OUTPUT VOLTAGE vs. LOAD CURRENT OUTPUT VOLTAGE (V) MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V-Powered, Multichannel RS-232 Drivers/Receivers 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C) ........889mW 24-Pin Narrow CERDIP (derate 12.50mW/°C above +70°C) ..............1W 24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW Operating Temperature Ranges MAX2 _ _ C _ _......................................................0°C to +70°C MAX2 _ _ E _ _ ...................................................-40°C to +85°C MAX2 _ _ M _ _......................................................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) 20 PDIP (P20M+1) .........................................................+225°C 24 PDIP (P24M-1) ..........................................................+225°C All other lead(Pb)-free packages...................................+260°C All other packages containing lead(Pb) ...........................+240°C 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—MAX223/MAX230–MAX241 (MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10%; MAX233/MAX235, V CC = +5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5) PARAMETER CONDITIONS Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground VCC Supply Current No load, TA = +25°C V+ Supply Current MIN TYP ±5.0 ±7.3 5 10 MAX223/230/234–238/240/241 7 15 MAX231/239 0.4 1 MAX231 1.8 5 MAX239 5 15 MAX223 15 50 MAX230/235/236/240/241 1 10 TA = +25°C Input Logic-Low Voltage TIN, EN, SHDN (MAX233); EN, SHDN (MAX230/235–241) 0.8 TIN 2.0 Input Logic-High Voltage EN, SHDN (MAX223); EN, SHDN (MAX230/235/236/240/241) 2.4 Logic Pullup Current VTIN = 0V mA mA µA V V 1.5 -30 UNITS V MAX232/233 Shutdown Supply Current Receiver Input Voltage Operating Range MAX 200 µA +30 V _______________________________________________________________________________________ 5 MAX220–MAX249 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 + 0.3V) RIN .....................................................................................±30V Output Voltages TOUT ..................................................(V+ + 0.3V) to (V- - 0.3V) ROUT........................................................-0.3V to (VCC + 0.3V) Short-Circuit Duration, TOUT to GND ........................Continuous Continuous Power Dissipation (TA = +70°C) 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP (derate 13.33mW/°C above +70°C) ..........1.07W 24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C).......800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued) (MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10%; MAX233/MAX235, V CC = +5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5) PARAMETER RS-232 Input Logic-Low Voltage RS-232 Input Logic-High Voltage CONDITIONS TA = +25°C, VCC = +5V TA = +25°C, VCC = +5V MIN TYP Normal operation VSHDN = +5V (MAX223) VSHDN = 0V (MAX235/236/240/241) 0.8 1.2 Shutdown (MAX223) VSHDN = 0V, VEN = +5V (R4IN, R5IN) 0.6 1.5 Normal operation VSHDN = 5V (MAX223) VSHDN = 0V (MAX235/236/240/241) 1.7 Shutdown (MAX223) VSHDN = 0V, VEN = +5V (R4IN‚ R5IN) 1.5 2.4 0.2 0.5 1.0 V 3 5 7 kΩ 0.4 V RS-232 Input Resistance TA = +25°C, VCC = +5V TTL/CMOS Output Voltage Low IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA) TTL/CMOS Output Voltage High IOUT = -1mA TTL/CMOS Output Leakage Current 0V ≤ ROUT ≤ VCC; VEN = 0V (MAX223); VEN = VCC (MAX235–241) Receiver Output Enable Time Normal operation MAX223 600 MAX235/236/239/240/241 400 Receiver Output Disable Time Normal operation MAX223 900 MAX235/236/239/240/241 250 Propagation Delay Normal operation RS-232 IN to TTL/CMOS OUT, VSHDN = 0V CL = 150pF (MAX223) Transmitter Output Short-Circuit Current 3.5 VCC - 0.4 ±0.05 V ±10 ns 10 tPHLS 4 40 tPLHS 6 40 5.1 30 3 µA ns 0.5 MAX223/MAX230/MAX234–241, TA = +25°C, VCC = +5V, RL = 3kΩ to 7kΩ‚ CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V µs V/µs MAX231/MAX232/MAX233, TA = +25°C, VCC = +5V, RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V VCC = V+ = V- = 0V, VOUT = ±2V 2.4 V VCC = +5V, no hysteresis in shutdown Transmitter Output Resistance UNITS V RS-232 Input Hysteresis Transition Region Slew Rate MAX 4 30 Ω 300 ±10 mA mA Note 5: All units are production tested at hot except for the MAX240, which is production tested at TA = +25°C. Specifications over temperature are guaranteed by design. 6 _______________________________________________________________________________________ +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX223/MAX230–MAX241 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 2 TRANSMITTERS LOADED 7.2 6.5 5.0 4.5 160kb/s 80kb/s 20kb/s 6.6 TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3kΩ C1–C4 = 1μF 6.4 6.2 6.0 0 5.5 500 1000 1500 8.0 7.0 3 TRANSMITTERS LOADED 4 TRANSMITTERS LOADED 6.0 5.0 4.0 500 0 2500 2000 1000 1500 2000 2500 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (VOL) vs. VCC TRANSMITTER OUTPUT VOLTAGE (VOL) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CURRENT -7.0 TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3kΩ C1–C4 = 1μF -6.2 -6.4 VOL (V) -6.6 -7.5 1 TRANSMITTER LOADED 2 TRANSMITTERS LOADED -7.0 8 6 VCC (V) 5.5 -2 V+ LOADED, NO LOAD ON V- -8 -7.6 5.0 0 -6 -7.4 -9.0 2 -4 -7.2 3 TRANSMITTERS LOADED TA = +25°C VCC = +5V C1–C4 = 1μF V- LOADED, V+ AND VNO LOAD EQUALLY ON V+ LOADED 4 160kb/s 80kb/s 20kb/s -6.8 10 MAX220-09 -6.0 MAX220-08 TA = +25°C C1–C4 = 1μF TRANSMITTER LOADS = 3kΩ || 2500pF V+, V- (V) -6.5 4.5 2 TRANSMITTERS LOADED 9.0 LOAD CAPACITANCE (pF) 4 TRANSMITTERS LOADED -8.5 TA = +25°C VCC = +5V LOADED, RL = 3kΩ C1–C4 = 1μF VCC (V) -6.0 -8.0 6.8 SLEW RATE (V/μs) 3 TRANSMITTERS LOADED TA = +25°C C1–C4 = 1μF TRANSMITTER 4 TRANSMITTERS LOADS = 3kΩ || 2500pF LOADED 7.5 7.0 VOL (V) VOH (V) 1 TRANSMITTER LOADED 1 TRANSMITTER LOADED 11.0 10.0 7.0 MAX220-07 VOH (V) 8.0 12.0 MAX220-05 7.4 MAX220-04 8.5 TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE MAX220-06 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. VCC ALL TRANSMITTERS UNLOADED -10 0 500 1000 1500 2500 2000 0 LOAD CAPACITANCE (pF) 5 10 15 20 25 30 35 40 45 50 CURRENT (mA) V+, V- WHEN EXITING SHUTDOWN (1μF CAPACITORS) MAX220-13 V+ O V- VSHDN* 500ms/div *SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTS _______________________________________________________________________________________ 7 MAX220–MAX249 __________________________________________Typical Operating Characteristics MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249 (Voltages referenced to GND.) Supply Voltage (VCC) ...............................................-0.3V to +6V Input Voltages TIN‚ ENA, ENB, ENR, ENT, ENRA, ENRB, ENTA, ENTB..................................-0.3V to (VCC + 0.3V) RIN .....................................................................................±25V TOUT (Note 6)....................................................................±15V ROUT........................................................-0.3V to (VCC + 0.3V) Short Circuit Duration (one output at a time) TOUT to GND ...........................................................Continuous ROUT to GND...........................................................Continuous 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_ _ ...............................-40°C to +85°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering,10s)) .................................+300°C Soldering Temperature (reflow) 40 PDIP (P40M-2) ..........................................................+225°C All other lead(Pb)-free packages...................................+260°C All other packages containing lead(Pb) ........................+240°C Note 6: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V. 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—MAX225/MAX244–MAX249 (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 UNITS 1.4 0.8 V RS-232 TRANSMITTERS Input Logic-Low Voltage Input Logic-High Voltage 2 Normal operation Logic Pullup/lnput Current Tables 1a–1d Data Rate Tables 1a–1d, normal operation Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND Output Leakage Current (Shutdown) Tables 1a–1d Shutdown ±5 1.4 V 10 50 ±0.01 ±1 120 64 ±7.5 µA kbps V VENA, VENB, VENT, VENTA, VENTB = VCC, VOUT = ±15V ±0.01 ±25 VCC = 0V, VOUT = ±15V ±0.01 ±25 µA Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V (Note 8) 300 10M Ω Output Short-Circuit Current VOUT = 0V ±7 ±30 mA RS-232 RECEIVERS RS-232 Input Voltage Operating Range ±25 RS-232 Input Logic-Low Voltage VCC = +5V RS-232 Input Logic-High Voltage VCC = +5V RS-232 Input Hysteresis VCC = +5V RS-232 Input Resistance 0.2 3 1.3 2.4 V 0.5 1.0 V 5 7 kΩ 0.2 0.4 V IOUT = 3.2mA TTL/CMOS Output Voltage High IOUT = -1.0mA 3.5 VCC - 0.2 Sourcing VOUT = VGND -2 -10 Sinking VOUT = VCC 10 30 TTL/CMOS Output Leakage Current Normal operation, outputs disabled, Tables 1a–1d, 0V ≤ VOUT ≤ VCC, VENR_ = VCC V 1.8 TTL/CMOS Output Voltage Low TTL/CMOS Output Short-Circuit Current 8 0.8 V ±0.05 _______________________________________________________________________________________ V mA ±0.10 µA +5V-Powered, Multichannel RS-232 Drivers/Receivers (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 UNITS POWER SUPPLY AND CONTROL LOGIC Supply Voltage Range No load VCC Supply Current (Normal Operation) Shutdown Supply Current 3kΩ loads on all outputs MAX225 4.75 5.25 MAX244–MAX249 4.5 5.5 MAX225 10 20 MAX244–MAX249 11 30 MAX225 40 MAX244–MAX249 57 TA = +25°C 8 TA = TMIN to TMAX 50 Leakage current Control Input 25 ±1 Logic-low voltage Logic-high voltage 1.4 0.8 V mA µA µA V 2.4 1.4 5 10 30 tPHLT, Figure 1 1.3 3.5 tPLHT, Figure 1 1.5 3.5 tPHLR, Figure 2 0.6 1.5 tPLHR, Figure 2 0.6 1.5 tPHLS, Figure 2 0.6 10 tPLHS, Figure 2 3.0 10 Transmitter + to - Propagation Delay Difference (Normal Operation) tPHLT - tPLHT 350 ns Receiver + to - Propagation Delay Difference (Normal Operation) tPHLR - tPLHR 350 ns Receiver-Output Enable Time tER, Figure 3 100 500 ns Receiver-Output Disable Time tDR, Figure 3 100 500 ns AC CHARACTERISTICS Transition Slew Rate Transmitter Propagation Delay TLL to RS-232 (Normal Operation) Receiver Propagation Delay TLL to RS-232 (Normal Operation) Receiver Propagation Delay TLL to RS-232 (Low-Power Mode) Transmitter Enable Time Transmitter Disable Time CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = +5V, TA = +25°C, measured from +3V to -3V or -3V to +3V V/µs µs µs µs tET tDT, Figure 4 MAX246–MAX249 (excludes charge-pump startup) 5 µs MAX225/MAX245–MAX249 (includes charge-pump startup) 10 ms 100 ns Note 7: All units production tested at hot. Specifications over temperature are guaranteed by design. Note 8: The 300Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC = 0V is 10MΩ as is implied by the leakage specification. _______________________________________________________________________________________ 9 MAX220–MAX249 ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued) __________________________________________Typical Operating Characteristics MAX225/MAX244–MAX249 8 V+ AND V- LOADED 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 EITHER V+ OR V- LOADED 2 3 LOAD CAPACITANCE (nF) 4 5 40kb/s 7.0 60kb/s 6.0 100kb/s V+ AND V- LOADED 200kb/s 5.5 V+ LOADED -10 1 7.5 6.5 -8 0 8.0 V- LOADED -4 -6 2 VCC = +5V WITH ALL TRANSMITTERS DRIVEN LOADED WITH 5kΩ 10kb/s 20kb/s 8.5 V+, V- (V) OUTPUT VOLTAGE (V) 6 14 9.0 MAX220-11 VCC = +5V 4 10 10 MAX220-10 18 16 TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES OUTPUT VOLTAGE vs. LOAD CURRENT FOR V+ AND V- MAX220-12 TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE TRANSMITTER SLEW RATE (V/μs) MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers 0 5 10 15 20 25 LOAD CURRENT (mA) 30 ALL CAPACITIORS 1μF 5.0 35 0 1 2 3 LOAD CAPACITANCE (nF) ______________________________________________________________________________________ 4 5 +5V-Powered, Multichannel RS-232 Drivers/Receivers +3V 0V* 50% 50% 50% 50% INPUT +3V INPUT 0V VCC OUTPUT GND V+ 0V V- OUTPUT tPLHT tPLHR tPLHS tPHLR tPHLS tPHLT *EXCEPT FOR R2 ON THE MAX243 WHERE -3V IS USED. Figure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay Timing EN RX OUT RX IN 1kΩ RX VCC - 2V SHDN +3V a) TEST CIRCUIT 0V 150pF EN INPUT OUTPUT DISABLE TIME (tDT) +3V 0V V+ +5V EN OUTPUT ENABLE TIME (tER) 0V -5V +3.5V V- RECEIVER OUTPUTS +0.8V a) TIMING DIAGRAM b) ENABLE TIMING +3V EN INPUT EN 0V 1 OR 0 TX OUTPUT DISABLE TIME (tDR) VOH 50pF VOH - 0.5V RECEIVER OUTPUTS VOL 3kΩ VCC - 2V VOL + 0.5V b) TEST CIRCUIT c) DISABLE TIMING Figure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable Timing ______________________________________________________________________________________ 11 MAX220–MAX249 Test Circuits/Timing Diagrams 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 All Active All Active 0 1 Normal Operation All Active All High-Z 1 0 Shutdown All High-Z All Low-Power Receive Mode 1 1 Shutdown All High-Z All High-Z OPERATION STATUS TRANSMITTERS RECEIVERS Table 1b. MAX245 Control Pin Configurations TRANSMITTERS RECEIVERS OPERATION STATUS TA1–TA4 TB1–TB4 0 Normal Operation All Active All Active All Active All Active 0 1 Normal Operation All Active All Active RA1–RA4 High-Z, RA5 Active RB1–RB4 High-Z, RB5 Active 1 0 Shutdown All High-Z All High-Z All Low-Power Receive Mode All Low-Power Receive Mode 1 1 Shutdown All High-Z All High-Z RA1–RA4 High-Z, RA5 Low-Power Receive Mode RB1–RB4 High-Z, RB5 Low-Power Receive Mode ENT ENR 0 RA1–RA5 RB1–RB5 Table 1c. MAX246 Control Pin Configurations 12 ENA ENB 0 0 0 OPERATION STATUS TRANSMITTERS RECEIVERS TA1–TA4 TB1–TB4 RA1–RA5 Normal Operation All Active All Active All Active All Active 1 Normal Operation All Active All High-Z All Active RB1–RB4 High-Z, RB5 Active 1 0 Shutdown All High-Z All Active RA1–RA4 High-Z, RA5 Active All Active 1 1 Shutdown All High-Z All High-Z RA1–RA4 High-Z, RA5 Low-Power Receive Mode RB1–RB4 High-Z, RA5 Low-Power Receive Mode ______________________________________________________________________________________ RB1–RB5 +5V-Powered, Multichannel RS-232 Drivers/Receivers TRANSMITTERS ENTA ENTB ENRA ENRB OPERATION STATUS RECEIVERS MAX247 TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB5 MAX248 TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB4 MAX249 TA1–TA3 TB1–TB3 RA1–RA5 RB1–RB5 0 0 0 0 Normal Operation All Active All Active All Active All Active 0 0 0 1 Normal Operation All Active All Active All Active All High-Z, except RB5 stays active on MAX247 0 0 1 0 Normal Operation All Active All Active All High-Z All Active 0 0 1 1 Normal Operation All Active All Active All High-Z All High-Z, except RB5 stays active on MAX247 0 1 0 0 Normal Operation All Active All High-Z All Active All Active 0 1 0 1 Normal Operation All Active All High-Z All Active All High-Z, except RB5 stays active on MAX247 0 1 1 0 Normal Operation All Active All High-Z All High-Z All Active 0 1 1 1 Normal Operation All Active All High-Z All High-Z All High-Z, except RB5 stays active on MAX247 1 0 0 0 Normal Operation All High-Z All Active All Active All Active 1 0 0 1 Normal Operation All High-Z All Active All Active All High-Z, except RB5 stays active on MAX247 1 0 1 0 Normal Operation All High-Z All Active All High-Z All Active 1 0 1 1 Normal Operation All High-Z All Active All High-Z All High-Z, except RB5 stays active on MAX247 1 1 0 0 Shutdown All High-Z All High-Z Low-Power Receive Mode Low-Power Receive Mode 1 1 0 1 Shutdown All High-Z All High-Z Low-Power Receive Mode All High-Z, except RB5 stays active on MAX247 1 1 1 0 Shutdown All High-Z All High-Z All High-Z Low-Power Receive Mode 1 1 1 1 Shutdown All High-Z All High-Z All High-Z All High-Z, except RB5 stays active on MAX247 ______________________________________________________________________________________ 13 MAX220–MAX249 Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers _______________Detailed Description The MAX220–MAX249 contain four sections: dual charge-pump 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. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output. A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section), except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated, so the output voltage drops with increasing load current. Do not load V+ and V- to a point that violates the minimum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222, MAX225, MAX230, MAX235, MAX236, MAX240, MAX241, and MAX245–MAX249, avoid using V+ and Vto power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applications where a +10V external supply is applied to the V+ pin (instead of using the internal charge pump to generate +10V), the C1 capacitor must not be installed and the SHDN pin must be connected to V CC . This is because V+ is internally connected to VCC in shutdown mode. RS-232 Drivers The typical driver output voltage swing is ±8V when loaded with a nominal 5kΩ RS-232 receiver and VCC = +5V. Output swing is guaranteed to meet the EIA/TIA232E and V.28 specification, which calls for ±5V minimum driver output levels under worst-case conditions. These include a minimum 3kΩ load, VCC = +4.5V, and maximum operating temperature. Unloaded driver output voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible. The inputs of unused drivers can be left unconnected since 400kΩ input pullup resistors to VCC are built in (except for the MAX220). The pullup resistors force the outputs of unused drivers low because all drivers invert. The internal input pullup resistors typically source 12µA, except in shutdown mode where the pullups are disabled. Driver outputs turn off and enter a high-impedance state—where leakage current is typically microamperes (maximum 25µA)—when in shutdown 14 mode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The powersupply current typically drops to 8µA in shutdown mode. The MAX220 does not have pullup resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or VCC. The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240, and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver threestate control on the receiver outputs. The receiver TTL/CMOS outputs are in a high-impedance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239– MAX241), and are also high-impedance whenever the shutdown control line is high. When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1µA with the driver output pulled to ground. The driver output leakage remains less than 1µA, even if the transmitter output is backdriven between 0V and (VCC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1kΩ series impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1kΩ. The driver output slew rate is limited to less than 30V/µs as required by the EIA/TIA-232E and V.28 specifications. Typical slew rates are 24V/µs unloaded and 10V/µs loaded with 3Ω and 2500pF. RS-232 Receivers EIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert. Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels. The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors with Table 2. Three-State Control of Receivers PART SHDN SHDN EN EN(R) RECEIVERS MAX223 __ Low High High X Low High __ High Impedance Active High Impedance MAX225 __ __ __ Low High High Impedance Active MAX235 MAX236 MAX240 Low Low High __ __ Low High X High Impedance Active High Impedance ______________________________________________________________________________________ +5V-Powered, Multichannel RS-232 Drivers/Receivers Low-Power Receive Mode The low-power receive mode feature of the MAX223, MAX242, and MAX245–MAX249 puts the IC into shutdown mode but still allows it to receive information. This is important for applications where systems are periodically awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communication at faster data rates. This operation conserves system power. Negative Threshold—MAX243 The MAX243 is pin compatible with the MAX232A, differing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left unconnected without interrupting communication. Different cables are not needed to interface with different pieces of equipment. The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is connected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left unconnected‚ or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚ the control lines must either be driven or connected with jumpers to an appropriate positive voltage level. Shutdown—MAX222–MAX242 On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown. On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SHDN for MAX241) also disables the receiver outputs. The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply current drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver outputs are controlled by the ENR input‚ while the remaining two receivers (RA5 and RB5) are always active. RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high. Receiver and Transmitter Enable Control Inputs The MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls. The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and lowpower receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown. ______________________________________________________________________________________ 15 MAX220–MAX249 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. The receiver propagation delay is typically 600ns and is independent of input swing direction. MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers 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 three-state mode. As in the MAX245, one Aside and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shutdown mode when both the A and B sides are disabled (ENA = ENB = +5V). The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active. The device enters shutdown mode with a logic high on both ENTA and ENTB. The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. 16 The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three drivers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s. __________Applications Information Figures 5 through 25 show pin configurations and typical operating circuits. In applications that are sensitive to power-supply noise, VCC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device. ______________________________________________________________________________________ +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 +5V INPUT C3 TOP VIEW C5 C1+ 1 + V+ 2 C2+ 4 C2- 5 C1 15 GND C1- 3 14 T1OUT MAX220 MAX232 MAX232A C2 13 R1IN +5V 400kΩ 11 T1IN 12 R1OUT V- 6 11 T1IN T2OUT 7 TTL/CMOS INPUTS 10 T2IN 9 R2IN 8 16 VCC C1+ +5V TO +10V 3 C1VOLTAGE DOUBLER 4 C2+ +10V TO -10V 5 C2- VOLTAGE INVERTER 1 16 VCC R2OUT DIP/SO V- 6 -10V C4 T1OUT 14 +5V RS-232 OUTPUTS 400kΩ 10 T2IN T2OUT 7 R1IN 13 12 R1OUT TTL/CMOS OUTPUTS CAPACITANCE (μF) DEVICE C1 C2 C3 C4 C5 MAX220 0.047 0.33 0.33 0.33 0.33 MAX232 1.0 1.0 1.0 1.0 1.0 MAX232A 0.1 0.1 0.1 0.1 0.1 V+ 2 +10V RS-232 INPUTS 5kΩ R2IN 8 9 R2OUT 5kΩ GND 15 Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit +5V INPUT C3 ALL CAPACITORS = 0.1μF TOP VIEW C5 17 VCC 3 +10V C1+ +5V TO +10V V+ 4 C1- VOLTAGE DOUBLER 5 C2+ 7 -10V +10V TO -10V V6 C2C4 VOLTAGE INVERTER 2 (N.C.) EN 1 (N.C.) EN 1 + 18 SHDN 19 VCC 18 GND 17 VCC V+ 3 V+ 3 16 GND C1- 4 15 T1OUT C2+ 5 14 R1IN C2- 6 C2+ 5 C2- 6 MAX222 MAX242 13 R1OUT V- 7 12 T1IN T2OUT 8 11 T2IN R2IN 9 10 R2OUT DIP/SO C2 16 N.C. +5V 400kΩ 12 T1IN 15 R1IN +5V 17 T1OUT MAX222 MAX242 V- 7 T2OUT C1 20 SHDN C1+ 2 C1+ 2 C1- 4 + 14 R1OUT 8 13 N.C. R2IN 9 12 T1IN R2OUT 10 11 T2IN SSOP TTL/CMOS INPUTS 400kΩ 11 T2IN (EXCEPT MAX220) T1OUT 15 T2OUT 8 13 R1OUT R1IN 14 TTL/CMOS OUTPUTS RS-232 INPUTS 5kΩ R2IN 9 10 R2OUT 1 (N.C.) EN ( ) ARE FOR MAX222 ONLY. PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY. RS-232 OUTPUTS (EXCEPT MAX220) 5kΩ SHDN GND 18 16 Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit ______________________________________________________________________________________ 17 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 0.1μF 28 +5V VCC 27 VCC 400kΩ + ENR 1 28 VCC ENR 2 27 VCC T1IN 3 26 ENT T2IN 4 R1OUT 5 T1IN 3 24 T4IN R2OUT 6 23 T5IN R3OUT 7 22 R4OUT R3IN 8 21 R5OUT R2IN 9 20 R5IN R1IN 10 19 R4IN T1OUT 11 18 T3OUT T2OUT 12 17 T4OUT GND 13 16 T5OUT GND 14 15 T5OUT SO 11 400kΩ T2IN 4 T2OUT +5V 25 T3IN MAX225 T1OUT +5V 12 400kΩ T3IN 25 T3OUT +5V 18 400kΩ T4IN 24 T4OUT +5V 17 400kΩ T5OUT T5IN 23 16 ENT 26 T5OUT R1OUT 5 R1IN 15 10 5kΩ R2OUT 6 R2IN 9 5kΩ R3OUT 7 MAX225 FUNCTIONAL DESCRIPTION 5 RECEIVERS 5 TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT) R3IN 5kΩ R4OUT 22 R4IN R5OUT R5IN 5kΩ 1 2 ENR ENR GND 13 GND 14 Figure 7. MAX225 Pin Configuration and Typical Operating Circuit 18 19 5kΩ 21 PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED. CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER. 8 ______________________________________________________________________________________ 20 +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 +5V INPUT TOP VIEW 1.0μF 12 11 VCC +5V TO +10V VOLTAGE DOUBLER C1+ 1.0μF 14 C115 C2+ 1.0μF 16 C2- 1.0μF V+ +10V TO -10V VOLTAGE INVERTER V- 13 17 1.0μF +5V 400kΩ 7 T1IN T1 + T3OUT 1 28 T4OUT T1OUT 2 27 R3IN T2OUT 3 25 SHDN (SHDN) R2OUT 5 T2IN 6 +5V 400kΩ 6 T2IN 26 R3OUT R2IN 4 24 EN (EN) MAX223 MAX241 T1IN 7 GND 10 19 R5OUT* VCC 11 18 R5IN* C1+ 12 17 V- V+ 13 16 C2- C1- 14 15 C2+ Wide SO/ SSOP RS-232 OUTPUTS T3 T3OUT 1 +5V 400kΩ 21 T4IN 20 T3IN T2OUT 3 400kΩ 20 T3IN 23 R4IN* R1IN 9 T2 +5V TTL/CMOS INPUTS 22 R4OUT* R1OUT 8 T1OUT 2 21 T4IN 8 R1OUT T4 R1 T4OUT 28 R1IN 9 5kΩ 5 R2OUT R2 R2IN 4 5kΩ LOGIC OUTPUTS 26 R3OUT R3 R3IN 27 5kΩ 22 R4OUT R4 RS-232 INPUTS R4IN 23 5kΩ 19 R5OUT R5 *R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN. NOTE: PIN LABELS IN ( ) ARE FOR MAX241. 24 EN (EN) GND R5IN 18 5kΩ SHDN 25 (SHDN) 10 Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 19 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V INPUT 1.0μF TOP VIEW 1.0μF T3OUT + 20 T4OUT 1 T1OUT 2 19 T5IN T2OUT 3 18 N.C. T2IN 4 T1IN 5 1.0μF 11 +10V TO -10V C2+ 12 C2- VOLTAGE INVERTER 15 T4IN VCC 7 14 T3IN C1+ 8 13 V- V+ 9 12 C2- C1- 10 11 C2+ 13 V- 1.0μF 400kΩ 5 T1IN T1OUT 2 T1 +5V 16 T5OUT GND 6 1.0μF 9 +5V 17 SHDN MAX230 7 VCC V+ +5V TO +10V VOLTAGE DOUBLER 8 C1+ 10 C1- 400kΩ 4 T2IN T2OUT 3 T2 +5V 400kΩ TTL/CMOS INPUTS 14 T3IN T3OUT 1 T3 +5V RS-232 OUTPUTS 400kΩ 15 T4IN +5V T4OUT 20 T4 400kΩ DIP/SO 19 T5IN T5OUT 16 T5 N.C. x 18 17 GND SHDN 6 Figure 9. MAX230 Pin Configuration and Typical Operating Circuit +5V INPUT TOP VIEW +7.5V TO +12V 1.0μF 13 (15) 1 2 1.0μF C+ 1 CV- + 2 3 T2OUT 4 14 V+ C+ 1 13 VCC C- 2 R2IN 5 11 T1OUT 10 R1IN R2OUT 6 9 R1OUT T2IN 7 8 T1IN T2OUT 4 8 14 GND 13 T1OUT 11 R1OUT T2IN 7 10 T1IN N.C. 8 9 N.C. DIP SO V- T1IN C2 1.0μF (13) RS-232 OUTPUTS 400kΩ (11) 7 T2IN 9 R1OUT T2OUT 4 T2 R1IN 10 R1 TTL/CMOS OUTPUTS 5kΩ 6 R2OUT R2IN 5 R2 GND 12 (14) Figure 10. MAX231 Pin Configurations and Typical Operating Circuit 20 (16) 3 T1OUT 11 T1 5kΩ PIN NUMBERS IN ( ) ARE FOR SO PACKAGE. 14 +5V TTL/CMOS INPUTS 12 R1IN R2IN 5 R2OUT 6 V+ 400kΩ (10) 15 VCC MAX231 C1- VCC +12V TO -12V VOLTAGE CONVERTER +5V 16 V+ V- 3 12 GND MAX231 + C1+ ______________________________________________________________________________________ (12) RS-232 INPUTS +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 +5V INPUT 1.0μF TOP VIEW 7 VCC +5V 400kΩ T2IN 1 + T1IN 2 19 R2IN R1OUT 3 GND 6 TTL/CMOS INPUTS RS-232 OUTPUTS 400kΩ 1 T2IN 3 R1OUT 17 V- MAX233 MAX233A T1OUT 5 T1IN +5V 18 T2OUT R1IN 4 T1OUT 5 2 20 R2OUT T2OUT 18 R1IN 4 16 C215 C2+ VCC 7 14 V+ (C1-) (V+) C1+ 8 5kΩ TTL/CMOS OUTPUTS 20 R2OUT 13 C1- (C1+) GND 9 12 V- (C2+) (V-) CS- 10 11 C2+ (C2-) DIP/SO 8 (13) DO NOT MAKE CONNECTIONS TO 13 (14) THESE PINS 12 (10) INTERNAL -10V 17 POWER SUPPLY INTERNAL +10V POWER SUPPLY RS-232 INPUTS R2IN 19 5kΩ C2+ 11 (12) C1+ C1- C2+ V- C2- V14 (8) V+ CSGND 15 16 10 (11) GND 6 9 PIN NAMES IN ( ) ARE FOR SO PACKAGE. Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit +5V INPUT 1.0μF TOP VIEW 7 1.0μF 9 10 T1OUT 1 + 1.0μF 16 T3OUT T2OUT 2 C1C2+ 11 C2- 12 V- VCC 6 11 C2- C1+ 7 10 C2+ 9 V+ 8 4 T1IN 13 T3IN GND 5 C1- +10V TO -10V VOLTAGE INVERTER 1.0μF 8 V+ V- 12 1.0μF 400kΩ 14 T4IN MAX234 6 VCC +5V TO +10V VOLTAGE DOUBLER +5V 15 T4OUT T2IN 3 T1IN 4 C1+ T1 T1OUT 1 T2OUT 2 +5V 400kΩ 3 T2IN T2 +5V TTL/CMOS INPUTS RS-232 OUTPUTS 400kΩ 13 T3IN T3 T3OUT 16 T4OUT 15 +5V DIP/SO 400kΩ 14 T4IN T4 GND 5 Figure 12. MAX234 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 21 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V INPUT TOP VIEW 1.0μF 12 +5V VCC 400kΩ 8 T1IN T1 T1OUT 3 T2 T2OUT 4 +5V 400kΩ 7 T2IN +5V 400kΩ T4OUT 1 TTL/CMOS INPUTS + 23 R3OUT T1OUT 3 22 T5IN T2OUT 4 21 SHDN MAX235 R2OUT 6 T3OUT 2 T3 400kΩ 16 T4IN +5V 20 EN T4OUT 1 T4 22 T5IN 400kΩ T5OUT 19 T5 19 T5OUT T2IN 7 18 R4IN T1IN 8 17 R4OUT R1OUT 9 16 T4IN R1IN 10 15 T3IN GND 11 14 R5OUT VCC 12 13 R5IN DIP 9 R1OUT R1IN 10 T1 5kΩ 6 R2OUT R2IN 5 R2 5kΩ TTL/CMOS OUTPUTS 23 R3OUT R3IN 24 R3 5kΩ 17 R4OUT R4IN 18 R4 5kΩ 14 R5OUT R5IN 13 R5 5kΩ 20 EN SHDN 21 GND 11 Figure 13. MAX235 Pin Configuration and Typical Operating Circuit 22 RS-232 OUTPUTS +5V 24 R3IN T3OUT 2 R2IN 5 15 T3IN ______________________________________________________________________________________ RS-232 INPUTS +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 TOP VIEW +5V INPUT 1.0μF 9 10 1.0μF 12 13 1.0μF 1.0μF VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1- V+ C2+ V- +10V TO -10V VOLTAGE INVERTER 14 C2- 11 15 1.0μF +5V 400kΩ 7 T1IN T3OUT 1 + 24 T4OUT T1OUT 2 23 R2IN T2OUT 3 22 R2OUT R1IN 4 R1OUT 5 21 SHDN MAX236 +5V 400kΩ 6 T2IN TTL/CMOS INPUTS 19 T4IN T1IN 7 18 T3IN GND 8 17 R3OUT 16 R3IN C1+ 10 15 V- V+ 11 14 C2- C1- 12 13 C2+ RS-232 OUTPUTS +5V 400kΩ 18 T3IN T3OUT 1 T3 +5V 400kΩ 19 T4IN VCC 9 T2OUT 3 T2 20 EN T2IN 6 T1OUT 2 T1 5 R1OUT T4OUT 24 T4 R1IN 4 R1 5kΩ DIP/SO TTL/CMOS OUTPUTS 22 R2OUT R2IN 23 R2 RS-232 INPUTS 5kΩ 17 R3OUT R3IN 16 R3 5kΩ 20 EN SHDN 21 GND 8 Figure 14. MAX236 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 23 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW +5V INPUT 1.0μF 10 1.0μF 12 13 1.0μF 14 1.0μF 9 VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1C2+ V+ V- +10V TO -10V VOLTAGE INVERTER C2- 11 15 1.0μF +5V T3OUT 1 400kΩ + 24 T4OUT T1OUT 2 23 R2IN T2OUT 3 22 R2OUT R1IN 4 R1OUT 5 7 T1IN T2IN 6 +5V 20 T5OUT 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+ T1OUT 2 T2OUT 3 T3OUT 1 T4OUT 24 T5OUT 20 400kΩ 6 T2IN 21 T5IN MAX237 T1 +5V T2 400kΩ TTL/CMOS INPUTS 18 T3IN +5V T3 RS-232 OUTPUTS 400kΩ 19 T4IN +5V T4 400kΩ 21 T5IN DIP/SO 5 R1OUT T5 R1 R1IN 4 5kΩ TTL/CMOS OUTPUTS 22 R2OUT R2 R2IN 23 5kΩ 17 R3OUT R3 R3IN 16 5kΩ GND 8 Figure 15. MAX237 Pin Configuration and Typical Operating Circuit 24 ______________________________________________________________________________________ RS-232 INPUTS +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 TOP VIEW +5V INPUT 1.0μF 1.0μF 9 10 1.0μF 12 13 1.0μF 14 C1+ C1- VCC +5V TO +10V VOLTAGE DOUBLER V+ +10V TO -10V VOLTAGE INVERTER V- C2+ C2- 11 15 1.0μF +5V 400kΩ T2OUT 1 + 5 T1IN 24 T3OUT T1OUT 2 T1 T1OUT 2 T2OUT 1 +5V 23 R3IN 400kΩ R2IN 3 22 R3OUT R2OUT 4 T1IN 5 18 T2IN 21 T4IN MAX238 20 T4OUT R1OUT 6 19 T3IN R1IN 7 18 T2IN GND 8 17 R4OUT VCC 9 16 R4IN C1+ 10 15 V- V+ 11 14 C2- C1- 12 13 C2+ T2 +5V TTL/CMOS INPUTS RS-232 OUTPUTS 400kΩ 19 T3IN T3 T3OUT 24 T4OUT 20 +5V 400kΩ 21 T4IN 6 R1OUT T4 R1 R1IN 7 5kΩ DIP/SO 4 R2OUT R2 TTL/CMOS OUTPUTS R2IN 3 RS-232 INPUTS 5kΩ 22 R3OUT R3 R3IN 23 5kΩ 17 R4OUT R4 R4IN 16 5kΩ GND 8 Figure 16. MAX238 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 25 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW +7.5V TO +13.2V INPUT +5V INPUT 1.0μF 4 6 1.0μF 7 5 VCC C1+ V+ V- +10V TO -10V VOLTAGE INVERTER C1- 8 1.0μF +5V 400kΩ 24 T1IN R1OUT 1 + T1 T1OUT 19 T2OUT 20 T3OUT 13 +5V 24 T1IN 400kΩ R1IN 2 23 T2IN GND 3 22 R2OUT VCC 4 V+ 5 TTL/CMOS INPUTS 23 T2IN +5V 21 R2IN MAX239 T2 RS-232 OUTPUTS 400kΩ 20 T2OUT 16 T3IN C+ 6 19 T1OUT C- 7 18 R3IN V- 8 17 R3OUT R5IN 9 16 T3IN R5OUT 10 15 N.C. R4OUT 11 14 EN 1 R1OUT T3 R1 R1IN 2 5kΩ R4IN 12 22 R2OUT R2 R2IN 21 13 T3OUT 5kΩ DIP/SO TTL/CMOS OUTPUTS 17 R3OUT R3 R3IN 18 5kΩ 11 R4OUT R4 R4IN 12 5kΩ 10 R5OUT R5 R5IN 9 5kΩ 15 N.C. 14 EN GND 3 Figure 17. MAX239 Pin Configuration and Typical Operating Circuit 26 ______________________________________________________________________________________ RS-232 INPUTS +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 +5V INPUT 1.0μF TOP VIEW 25 19 VCC +5V TO +10V VOLTAGE DOUBLER C1+ 1.0μF 27 C128 C2+ 1.0μF 29 C2- 1.0μF V+ +5V TO -10V VOLTAGE INVERTER V- 26 30 1.0μF +5V 400kΩ 15 T1IN +5V T1 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 TTL/CMOS INPUTS 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. T3 2 T5IN 16 R1OUT N.C. N.C. C1+ V+ C1C2+ C2 VN.C. N.C. N.C. 8 T3OUT 6 T4OUT 5 T5OUT 41 R1IN 17 RS-232 OUTPUTS 400kΩ 38 T4IN +5V T2OUT 400kΩ T4 400kΩ T5 R1 5kΩ 13 R2OUT R2 23 24 25 26 27 28 29 30 31 32 33 N.C. R2OUT T2IN T1IN R1OUT R1IN GND VCC N.C. N.C. N.C. T2 37 T3IN +5V + 7 400kΩ 14 T2IN +5V T1OUT R2IN 10 5kΩ TTL/CMOS OUTPUTS 3 R3OUT R3 R3IN 4 5kΩ RS-232 INPUTS Plastic FP 39 R4OUT R4 R4IN 40 5kΩ 36 R5OUT R5 R5IN 35 5kΩ 42 EN GND SHDN 43 18 Figure 18. MAX240 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 27 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V INPUT TOP VIEW 0.1μF 1 C1+ 1 + 16 VCC V+ 2 0.1μF 3 C14 C2+ 0.1μF 5 C2- 15 GND MAX243 V- 6 11 T1IN T2OUT 7 10 T2IN 9 R2IN 8 V+ +10V TO -10V VOLTAGE INVERTER V- 2 +10V 6 -10V 0.1μF 400kΩ 13 R1IN T1OUT 14 11 T1IN 12 R1OUT C2- 5 16 VCC +5V TO +10V VOLTAGE DOUBLER +5V 14 T1OUT C1- 3 C2+ 4 C1+ 0.1μF +5V TTL/CMOS INPUTS RS-232 OUTPUTS 400kΩ T2OUT 7 10 T2IN R2OUT DIP/SO R1IN 13 12 R1OUT TTL/CMOS OUTPUTS 5kΩ 9 R2OUT RECEIVER INPUT ≤ -3V OPEN ≥ +3V R1 OUTPUT HIGH HIGH LOW R2 OUTPUT HIGH LOW LOW R2IN 8 5kΩ GND 15 Figure 19. MAX243 Pin Configuration and Typical Operating Circuit 28 ______________________________________________________________________________________ RS-232 INPUTS +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 +5V TOP VIEW 1μF 1μF 20 VCC +5V TO +10V VOLTAGE DOUBLER 1μF RB5IN TB4OUT TB3OUT TB2OUT TB1OUT TA1OUT TA2OUT TA3OUT TA4OUT RA4IN RA5IN 21 1μF 6 5 4 3 2 1 44 43 42 41 40 C1+ 23 C124 C2+ 25 C2- 26 V- 1μF +10V TO -10V VOLTAGE INVERTER 2 TA1OUT + 22 V+ +5V +5V TB1OUT 44 400kΩ 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- C2- C2+ C1- V+ GND VCC 19 20 21 22 23 24 25 26 27 28 C1+ 18 TA4IN 34 RB2OUT PLCC TB1IN 30 15 TA1IN 2 TA2OUT +5V +5V 16 TA2IN 3 TA3OUT TB2IN 29 +5V +5V TB3OUT 42 400kΩ 17 TA3IN 4 TA4OUT TB3IN 28 +5V +5V TB4OUT 41 400kΩ 18 TA4IN TB4IN 27 9 RA1IN RB1IN 36 5kΩ 5kΩ 10 RA1OUT RB1OUT 35 8 RA2IN MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS NO CONTROL PINS TB2OUT 43 400kΩ RB2IN 37 5kΩ 5kΩ 11 RA2OUT RB2OUT 34 7 RA3IN RB3IN 38 5kΩ 5kΩ 12 RA3OUT RB3OUT 33 6 RA4IN RB4IN 39 5kΩ 5kΩ 13 RA4OUT RB4OUT 32 5 RA5IN RB5IN 40 5kΩ 5kΩ 14 RA5OUT RB5OUT 31 GND 19 Figure 20. MAX244 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 29 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1μF ENR 1 40 VCC + 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 MAX245 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 GND 19 22 TB3OUT 20 21 TB4OUT 16 TA1OUT +5V +5V TB1IN 38 2 TA1IN 17 TA2OUT +5V +5V 3 TA2IN 18 TA3OUT TB2IN 37 +5V +5V TB3OUT 22 400kΩ 4 TA3IN 19 TA4OUT TB3IN 36 +5V +5V TB4OUT 21 400kΩ 5 TA4IN TB4IN 35 1 ENR ENT 39 11 RA1IN RB1IN 29 5kΩ 5kΩ 10 RA1OUT RB1OUT 30 12 RA2IN RB2IN 28 5kΩ 5kΩ RB2OUT 31 13 RA3IN RB3IN 27 5kΩ 5kΩ MAX245 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTTERS 4 A-SIDE TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT) TB2OUT 23 400kΩ 9 RA2OUT DIP TB1OUT 24 400kΩ 8 RA3OUT RB3OUT 32 14 RA4IN RB4IN 26 5kΩ 5kΩ 7 RA4OUT RB4OUT 33 15 RA5IN RB5IN 25 5kΩ 5kΩ 6 RA5OUT RB5OUT 34 GND 20 Figure 21. MAX245 Pin Configuration and Typical Operating Circuit 30 ______________________________________________________________________________________ +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 +5V TOP VIEW 1μF ENA 1 TA1IN 2 + 40 VCC 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 RA2OUT 9 32 RB3OUT RA1OUT 10 31 RB2OUT RA1IN 11 30 RB1OUT MAX246 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 GND 20 21 TB4OUT 40 VCC +5V +5V 16 TA1OUT TB1OUT 24 400kΩ 2 TA1IN TB1IN 38 +5V +5V 17 TA2OUT TB2OUT 23 400kΩ 3 TA2IN TB2IN 37 +5V +5V 18 TA3OUT TB3OUT 22 400kΩ 4 TA3IN TB3IN 36 +5V +5V TB4OUT 21 19 TA4OUT 400kΩ TB4IN 35 5 TA4IN 1 ENA ENB 39 RB1IN 29 11 RA1IN 5kΩ 5kΩ RB1OUT 30 10 RA1OUT DIP RB2IN 28 12 RA2IN 5kΩ 5kΩ RB2OUT 31 9 RA2OUT RB3IN 27 13 RA3IN MAX246 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 2 CONTROL PINS ENABLE A-SIDE (ENA) ENABLE B-SIDE (ENB) 5kΩ 5kΩ RB3OUT 32 8 RA3OUT RB4IN 26 14 RA4IN 5kΩ 5kΩ RB4OUT 33 7 RA4OUT RB5IN 25 15 RA5IN 5kΩ 6 RA5OUT 5kΩ RB5OUT 34 GND 20 Figure 22. MAX246 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 31 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 ENTA 1 TA1IN 40 VCC +5V +5V 1 ENTA + TB1OUT 24 16 TA1OUT 400kΩ TB1IN 38 2 TA1IN +5V +5V TB2OUT 23 17 TA2OUT 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 MAX247 ENTB 39 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 400kΩ TB2IN 37 3 TA2IN +5V +5V TB3OUT 22 18 TA3OUT 400kΩ TB3IN 36 4 TA3IN +5V +5V TB4OUT 21 19 TA4OUT 400kΩ 5 TA4IN TB4IN 35 6 RB5OUT RB5IN 25 5kΩ RB1IN 29 12 RA1IN 5kΩ 5kΩ RB1OUT 31 10 RA1OUT RB2IN 28 13 RA2IN DIP 5kΩ MAX247 FUNCTIONAL DESCRIPTION 9 RECEIVERS 4 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB) 5kΩ RB2OUT 32 9 RA2OUT RB3IN 27 14 RA3IN 5kΩ 5kΩ RB3OUT 33 8 RA3OUT RB4IN 26 15 RA4IN 5kΩ 5kΩ RB4OUT 34 7 RA4OUT 11 ENRA ENRB 30 GND 20 Figure 23. MAX247 Pin Configuration and Typical Operating Circuit 32 ______________________________________________________________________________________ +5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220–MAX249 TOP VIEW +5V 1μF 1μF 20 TA3OUT TA2OUT TA1OUT TB1OUT RB4IN TA4OUT TA4OUT TB3OUT RA4IN TB2OUT RA3IN 21 1μF 6 5 4 3 2 1 44 43 42 41 40 1μF VCC +5V TO +10V VOLTAGE DOUBLER C1+ 23 C124 C2+ 25 C2- V- 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 MAX248 34 RB2OUT TA2IN 15 31 TB1IN TA3IN 16 30 TB2IN 29 TB3IN TB4IN ENTB V- C2- C2+ C1- V+ GND C1+ 19 20 21 22 23 24 25 26 27 28 VCC 18 ENTA 17 PLCC TB1OUT 44 400kΩ 14 TA1IN TB1IN 31 +5V +5V 2 TA2OUT TB2OUT 43 400kΩ 15 TA2IN TB2IN 30 +5V +5V 3 TA3OUT TB3OUT 42 400kΩ 16 TA3IN TB3IN 29 +5V +5V 4 TA4OUT TB4OUT 41 400kΩ 17 TA4IN TB4IN 28 8 RA1IN RB1IN 37 5kΩ MAX248 FUNCTIONAL DESCRIPTION 8 RECEIVERS 4 A-SIDE RECEIVERS 4 B-SIDE RECEIVERS 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB) 1μF +5V 1 TA1OUT 7 26 ENTB 27 +5V RA2IN 22 +10V TO -10V VOLTAGE INVERTER 18 ENTA + TA4IN V+ 5kΩ RB1OUT 35 10 RA1OUT RB2IN 38 7 RA2IN 5kΩ 5kΩ RB2OUT 34 11 RA2OUT RB3IN 39 6 RA3IN 5kΩ 5kΩ RB3OUT 33 12 RA3OUT RB4IN 40 5 RA4IN 5kΩ 5kΩ RB4OUT 32 13 RA4OUT ENRB 36 9 ENRA GND 19 Figure 24. MAX248 Pin Configuration and Typical Operating Circuit ______________________________________________________________________________________ 33 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1μF 1μF 20 TA3OUT TA2OUT TA1OUT TB1OUT RB4IN 1μF 6 5 4 3 2 1 44 43 42 41 40 1μF RB5IN RA5IN TB3OUT RA4IN TB2OUT RA3IN 21 + C1+ 23 C124 C2+ 25 C2- VCC +5V TO +10V VOLTAGE DOUBLER V- RA1IN 8 38 RB2IN ENRA 9 37 RB1IN RA1OUT 10 36 ENRB RA2OUT 11 35 RB1OUT RA3OUT 12 RA4OUT 13 33 RB3OUT RA5OUT 14 32 RB4OUT MAX249 34 RB2OUT TA1IN 15 31 RB5OUT TA2IN 16 30 TB1IN 29 TB2IN TB3IN ENTB V- C2- C2+ C1- V+ GND C1+ 19 20 21 22 23 24 25 26 27 28 VCC 18 ENTA 17 PLCC TB1OUT 44 400kΩ 15 TA1IN TB1IN 30 +5V +5V 2 TA2OUT TB2OUT 43 400kΩ 16 TA2IN TB2IN 29 +5V +5V 3 TA3OUT TB3OUT 42 400kΩ 17 TA3IN TB3IN 28 8 RA1IN RB1IN 37 5kΩ 5kΩ 10 RA1OUT RB1OUT 35 7 RA2IN RB2IN 38 5kΩ MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS 6 TRANSMITTERS 3 A-SIDE TRANSMITTERS 3 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB) 5kΩ 11 RA2OUT RB2OUT 34 6 RA3IN RB3IN 39 5kΩ 5kΩ 12 RA3OUT RB3OUT 33 5 RA4IN RB4IN 40 5kΩ 5kΩ 13 RA4OUT RB4OUT 32 4 RA5IN RB5IN 41 5kΩ 5kΩ 14 RA5OUT RB5OUT 31 9 ENRA ENRB 36 GND 19 Figure 25. MAX249 Pin Configuration and Typical Operating Circuit 34 1μF +5V 1 TA1OUT 39 RB3IN 26 ENTB 27 +5V 7 22 +10V TO -10V VOLTAGE INVERTER 18 ENTA RA2IN TA3IN V+ ______________________________________________________________________________________ +5V-Powered, Multichannel RS-232 Drivers/Receivers PART TEMP RANGE PIN-PACKAGE MAX222CPN+ 0°C to +70°C 18 Plastic DIP PART MAX232AC/D TEMP RANGE 0°C to +70°C PIN-PACKAGE Dice* MAX222CWN+ 0°C to +70°C 18 Wide SO MAX232AEPE+ -40°C to +85°C 16 Plastic DIP MAX222C/D 0°C to +70°C Dice* MAX232AESE+ -40°C to +85°C 16 Narrow SO MAX222EPN+ -40°C to +85°C 18 Plastic DIP MAX232AEWE+ -40°C to +85°C 16 Wide SO MAX222EWN+ -40°C to +85°C 18 Wide SO MAX232AEJE -40°C to +85°C 16 CERDIP MAX222EJN -40°C to +85°C 18 CERDIP MAX232AMJE -55°C to +125°C 16 CERDIP MAX222MJN -55°C to +125°C 18 CERDIP MAX232AMLP+ -55°C to +125°C 20 LCC MAX223CAI+ 0°C to +70°C 28 SSOP MAX233CPP+ 0°C to +70°C 20 Plastic DIP MAX223CWI+ 0°C to +70°C 28 Wide SO MAX233EPP+ -40°C to +85°C 20 Plastic DIP Dice* MAX233ACPP+ 0°C to +70°C 20 Plastic DIP 0°C to +70°C 20 Wide SO MAX223C/D 0°C to +70°C MAX223EAI+ -40°C to +85°C 28 SSOP MAX233ACWP+ MAX223EWI+ -40°C to +85°C 28 Wide SO MAX233AEPP+ -40°C to +85°C 20 Plastic DIP MAX225CWI+ 0°C to +70°C 28 Wide SO MAX233AEWP+ -40°C to +85°C 20 Wide SO MAX225EWI+ -40°C to +85°C 28 Wide SO MAX234CPE+ 0°C to +70°C 16 Plastic DIP MAX230CPP+ 0°C to +70°C 20 Plastic DIP MAX234CWE+ 0°C to +70°C 16 Wide SO MAX230CWP+ 0°C to +70°C 20 Wide SO MAX234C/D 0°C to +70°C Dice* MAX230C/D 0°C to +70°C Dice* MAX234EPE+ -40°C to +85°C 16 Plastic DIP 20 Plastic DIP MAX234EWE+ -40°C to +85°C 16 Wide SO -40°C to +85°C 16 CERDIP -55°C to +125°C 16 CERDIP MAX230EPP+ -40°C to +85°C MAX230EWP+ -40°C to +85°C 20 Wide SO MAX234EJE MAX230EJP -40°C to +85°C 20 CERDIP MAX234MJE MAX230MJP -55°C to +125°C 20 CERDIP MAX235CPG+ 0°C to +70°C 24 Wide Plastic DIP MAX231CPD+ 0°C to +70°C 14 Plastic DIP MAX235EPG+ -40°C to +85°C 24 Wide Plastic DIP MAX231CWE+ 0°C to +70°C 16 Wide SO MAX235EDG -40°C to +85°C 24 Ceramic SB MAX231CJD 0°C to +70°C 14 CERDIP MAX235MDG -55°C to +125°C 24 Ceramic SB MAX231C/D 0°C to +70°C Dice* MAX236CNG+ 0°C to +70°C 24 Narrow Plastic DIP MAX231EPD+ -40°C to +85°C 14 Plastic DIP MAX236CWG+ 0°C to +70°C 24 Wide SO MAX231EWE+ -40°C to +85°C 16 Wide SO MAX236C/D 0°C to +70°C Dice* -40°C to +85°C 24 Narrow Plastic DIP MAX231EJD -40°C to +85°C 14 CERDIP MAX236ENG+ MAX231MJD -55°C to +125°C 14 CERDIP MAX236EWG+ -40°C to +85°C 24 Wide SO MAX232CPE+ 0°C to +70°C 16 Plastic DIP MAX236ERG -40°C to +85°C 24 Narrow CERDIP MAX232CSE+ 0°C to +70°C 16 Narrow SO MAX236MRG -55°C to +125°C 24 Narrow CERDIP MAX232CWE+ 0°C to +70°C 16 Wide SO MAX237CNG+ 0°C to +70°C 24 Narrow Plastic DIP 0°C to +70°C Dice* MAX237CWG+ 0°C to +70°C 24 Wide SO MAX232EPE+ -40°C to +85°C 16 Plastic DIP MAX237C/D 0°C to +70°C Dice* MAX232ESE+ -40°C to +85°C 16 Narrow SO MAX237ENG+ -40°C to +85°C 24 Narrow Plastic DIP MAX232EWE+ -40°C to +85°C 16 Wide SO MAX237EWG+ -40°C to +85°C 24 Wide SO -40°C to +85°C 24 Narrow CERDIP MAX232C/D MAX232EJE -40°C to +85°C 16 CERDIP MAX237ERG MAX232MJE -55°C to +125°C 16 CERDIP MAX237MRG -55°C to +125°C 24 Narrow CERDIP MAX232MLP+ -55°C to +125°C 20 LCC MAX238CNG+ 0°C to +70°C 24 Narrow Plastic DIP MAX232ACPE+ 0°C to +70°C 16 Plastic DIP MAX238CWG+ 0°C to +70°C 24 Wide SO MAX232ACSE+ 0°C to +70°C 16 Narrow SO MAX238C/D 0°C to +70°C Dice* MAX232ACWE+ 0°C to +70°C 16 Wide SO +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. ______________________________________________________________________________________ 35 MAX220–MAX249 ___________________________________________Ordering Information (continued) MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers ___________________________________________Ordering Information (continued) PART MAX238ENG+ TEMP RANGE -40°C to +85°C PIN-PACKAGE 24 Narrow Plastic DIP PART MAX243CPE+ TEMP RANGE 0°C to +70°C PIN-PACKAGE 16 Plastic DIP MAX238EWG+ -40°C to +85°C 24 Wide SO MAX243CSE+ 0°C to +70°C 16 Narrow SO MAX238ERG -40°C to +85°C 24 Narrow CERDIP MAX243CWE+ 0°C to +70°C 16 Wide SO MAX238MRG -55°C to +125°C 24 Narrow CERDIP MAX243C/D 0°C to +70°C Dice* MAX239CNG+ 0°C to +70°C 24 Narrow Plastic DIP MAX243EPE+ -40°C to +85°C 16 Plastic DIP MAX239CWG+ 0°C to +70°C 24 Wide SO MAX243ESE+ -40°C to +85°C 16 Narrow SO MAX239C/D 0°C to +70°C Dice* MAX243EWE+ -40°C to +85°C 16 Wide SO MAX239ENG+ -40°C to +85°C 24 Narrow Plastic DIP MAX243EJE -40°C to +85°C 16 CERDIP MAX239EWG+ -40°C to +85°C 24 Wide SO MAX243MJE -55°C to +125°C 16 CERDIP MAX239ERG -40°C to +85°C 24 Narrow CERDIP MAX244CQH+ MAX239MRG -55°C to +125°C 0°C to +70°C 44 PLCC 0°C to +70°C Dice* 24 Narrow CERDIP MAX244C/D MAX240CMH+ 0°C to +70°C 44 Plastic FP MAX244EQH+ -40°C to +85°C MAX240C/D 0°C to +70°C Dice* MAX245CPL+ 0°C to +70°C 40 Plastic DIP MAX241CAI+ 0°C to +70°C 28 SSOP MAX245C/D 0°C to +70°C Dice* MAX241CWI+ 0°C to +70°C 28 Wide SO MAX245EPL+ -40°C to +85°C 40 Plastic DIP MAX241C/D 0°C to +70°C Dice* MAX246CPL+ 0°C to +70°C 40 Plastic DIP 0°C to +70°C Dice* 44 PLCC MAX241EAI+ -40°C to +85°C 28 SSOP MAX246C/D MAX241EWI+ -40°C to +85°C 28 Wide SO MAX246EPL+ -40°C to +85°C 40 Plastic DIP 0°C to +70°C 40 Plastic DIP 0°C to +70°C Dice* MAX242CAP+ 0°C to +70°C 20 SSOP MAX247CPL+ MAX242CPN+ 0°C to +70°C 18 Plastic DIP MAX247C/D MAX242CWN+ 0°C to +70°C 18 Wide SO MAX247EPL+ MAX242C/D 0°C to +70°C Dice* MAX248CQH+ 0°C to +70°C 44 PLCC 0°C to +70°C Dice* -40°C to +85°C 40 Plastic DIP MAX242EPN+ -40°C to +85°C 18 Plastic DIP MAX248C/D MAX242EWN+ -40°C to +85°C 18 Wide SO MAX248EQH+ -40°C to +85°C 44 PLCC MAX242EJN -40°C to +85°C 18 CERDIP MAX249CQH+ 0°C to +70°C 44 PLCC MAX242MJN -55°C to +125°C 18 CERDIP MAX249EQH+ -40°C to +85°C 44 PLCC +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. 36 ______________________________________________________________________________________ +5V-Powered, Multichannel RS-232 Drivers/Receivers PACKAGE TYPE PACKAGE CODE 14 PDIP P14+3 16 PDIP P16+1 16 PDIP P16+2 16 PDIP P16+3 18 PDIP P18+5 20 PDIP P20+3 20 PDIP P20M+1 24 PDIP N24+3 24 PDIP P24M+1 28 PDIP P28+2 40 PDIP P40+1 40 PDIP P40M+2 14 CERDIP J14-3 16 CERDIP J16-3 18 CERDIP J18-2 OUTLINE NO. LAND PATTERN NO. 21-0043 — 21-0044 21-0045 20 CERDIP J20-2 24 CERDIP R24-4 16 SO(N) S16+3 16 SO(N) S16+5 16 SO(W) W16+1 16 SO(W) W16+2 16 SO(W) W16+3 18 SO(W) W18+1 20 SO(W) W20+3 20 SO(W) W20M+1 24 SO(W) W24+2 28 SO(W) W28+1 28 SO(W) W28+2 28 SO(W) W28M+1 20 LCC L20+3 20 SSOP A20+1 24 SSOP A24+2 28 SSOP A28+1 16 TSSOP U16+1 16 FPCK F16-3 21-0013 — 44 MQFP M44+5 21-0826 90-0169 44 PLCC Q44+1 44 PLCC Q44+2 21-0049 90-0236 21-0041 90-0097 90-0107 90-0181 21-0042 90-0108 90-0182 90-0109 21-0658 90-0177 90-0094 21-0056 90-0110 90-0095 90-0117 ______________________________________________________________________________________ 37 MAX220–MAX249 Package Information For the latest package outline information and land patterns, go to www.maxim-ic.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 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 DESCRIPTION PAGES CHANGED 2, 5, 8 1, 2–9, 17–36 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 38 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.