MAX232CSE

General Description The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communica- tions interfaces, particularly applications where ±12V is not available. These parts are especially useful in battery-powered sys- tems, 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 appli- cations where printed circuit board space is critical. ________________________Applications Portable Computers Low-Power Modems Interface Translation Battery-Powered RS-232 Systems Multidrop RS-232 Networks Next-Generation Device Features ♦ 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™ M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers ________________________________________________________________ Maxim Integrated Products 1 Selection Table 19-4323; Rev 13; 4/04 PART MAX220CPE MAX220CSE MAX220CWE 0°C to +70°C 0°C to +70°C 0°C to +70°C TEMP RANGE PIN-PACKAGE 16 Plastic DIP 16 Narrow SO 16 Wide SO MAX220C/D 0°C to +70°C Dice* MAX220EPE MAX220ESE MAX220EWE -40°C to +85°C -40°C to +85°C -40°C to +85°C 16 Plastic DIP 16 Narrow SO 16 Wide SO MAX220EJE -40°C to +85°C 16 CERDIP MAX220MJE -55°C to +125°C 16 CERDIP Power No. of Nominal SHDN Rx Part Supply RS-232 No. of Cap. Value & Three- Active in Data Rate Number (V) Drivers/Rx Ext. Caps (µF) State SHDN (kbps) Features MAX220 +5 2/2 4 0.047/0.33 No — 120 Ultra-low-power, industry-standard pinout MAX222 +5 2/2 4 0.1 Yes — 200 Low-power shutdown MAX223 (MAX213) +5 4/5 4 1.0 (0.1) Yes ✔ 120 MAX241 and receivers active in shutdown MAX225 +5 5/5 0 — Yes ✔ 120 Available in SO MAX230 (MAX200) +5 5/0 4 1.0 (0.1) Yes — 120 5 drivers with shutdown MAX231 (MAX201) +5 and 2/2 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies; +7.5 to +13.2 same functions as MAX232 MAX232 (MAX202) +5 2/2 4 1.0 (0.1) No — 120 (64) Industry standard MAX232A +5 2/2 4 0.1 No — 200 Higher slew rate, small caps MAX233 (MAX203) +5 2/2 0 — No — 120 No external caps MAX233A +5 2/2 0 — No — 200 No external caps, high slew rate MAX234 (MAX204) +5 4/0 4 1.0 (0.1) No — 120 Replaces 1488 MAX235 (MAX205) +5 5/5 0 — Yes — 120 No external caps MAX236 (MAX206) +5 4/3 4 1.0 (0.1) Yes — 120 Shutdown, three state MAX237 (MAX207) +5 5/3 4 1.0 (0.1) No — 120 Complements IBM PC serial port MAX238 (MAX208) +5 4/4 4 1.0 (0.1) No — 120 Replaces 1488 and 1489 MAX239 (MAX209) +5 and 3/5 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies; +7.5 to +13.2 single-package solution for IBM PC serial port MAX240 +5 5/5 4 1.0 Yes — 120 DIP or flatpack package MAX241 (MAX211) +5 4/5 4 1.0 (0.1) Yes — 120 Complete IBM PC serial port MAX242 +5 2/2 4 0.1 Yes ✔ 200 Separate shutdown and enable MAX243 +5 2/2 4 0.1 No — 200 Open-line detection simplifies cabling MAX244 +5 8/10 4 1.0 No — 120 High slew rate MAX245 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, two shutdown modes MAX246 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, three shutdown modes MAX247 +5 8/9 0 — Yes ✔ 120 High slew rate, int. caps, nine operating modes MAX248 +5 8/8 4 1.0 Yes ✔ 120 High slew rate, selective half-chip enables MAX249 +5 6/10 4 1.0 Yes ✔ 120 Available in quad flatpack package For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Ordering Information Ordering Information continued at end of data sheet. *Contact factory for dice specifications. AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc. M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243 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 1: Input voltage measured with TOUT in high-impedance state, SHDN or VCC = 0V. Note 2: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Supply Voltage (VCC) ...............................................-0.3V to +6V Input Voltages TIN..............................................................-0.3V to (VCC - 0.3V) RIN (Except MAX220) ........................................................±30V RIN (MAX220).....................................................................±25V TOUT (Except MAX220) (Note 1) .......................................±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 V1.4 0.8Input Logic Threshold Low UNITSMIN TYP MAXPARAMETER CONDITIONS Input Logic Threshold High All devices except MAX220 2 1.4 V All except MAX220, normal operation 5 40 Logic Pull-Up/lnput Current SHDN = 0V, MAX222/242, shutdown, MAX220 ±0.01 ±1 µA VCC = 5.5V, SHDN = 0V, VOUT = ±15V, MAX222/242 ±0.01 ±10 Output Leakage Current ±0.01 ±10 200 116Data Rate kbps Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V 300 10M Ω Output Short-Circuit Current VOUT = 0V ±7 ±22 mA RS-232 Input Voltage Operating Range ±30 V All except MAX243 R2IN 0.8 1.3 RS-232 Input Threshold Low VCC = 5V MAX243 R2IN (Note 2) -3 V All except MAX243 R2IN 1.8 2.4 RS-232 Input Threshold High VCC = 5V MAX243 R2IN (Note 2) -0.5 -0.1 V All except MAX243, VCC = 5V, no hysteresis in shdn. 0.2 0.5 1 RS-232 Input Hysteresis MAX243 1 V 3 5 7 V±5 ±8Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND 2.4MAX220: VCC = 5.0V VOUT = ±15V VCC = SHDN = 0V ±25 µA MAX220, VOUT = ±12V ±60MAX220 VOUT = 0V ±25MAX220 RS-232 Input Resistance TA = +25°C (MAX220) 3 5 7 kΩ RS-232 TRANSMITTERS RS-232 RECEIVERS M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers _______________________________________________________________________________________ 3 Note 3: MAX243 R2OUT is guaranteed to be low when R2IN is ≥ 0V or is floating. 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.) SHDN = VCC or EN = VCC (SHDN = 0V for MAX222), 0V ≤ VOUT ≤ VCC TTL/CMOS Output Leakage Current ±0.05 ±10 µA MAX242EN Input Threshold Low 1.4 0.8 V ns160 500MAX242tDRReceiver-Output Disable Time, Figure 3 IOUT = 3.2mA ns MAX242 PARAMETER 125 500 MIN TYP MAX UNITS MAX242tERReceiver-Output Enable Time, Figure 3 µs 2.5 10MAX242tPLHS Receiver Propagation Delay RS-232 to TLL (Shutdown), Figure 2 0.5 10MAX242tPHLS µs 0.8 3MAX220 Receiver Propagation Delay RS-232 to TLL (Normal Operation), Figure 2 0.6 1MAX222/232A/233A/242/243tPLHR 0.6 3MAX220 tPHLR 0.5 1MAX222/232A/233A/242/243 EN Input Threshold High 0.2 0.4 2.0 1.4 V µs 5 10MAX220 tPLHT Transmitter Propagation Delay TLL to RS-232 (Normal Operation), Figure 1 1.5 3.5MAX222/232A/233A/242/243 4 10MAX220 tPHLT 1.3 3.5MAX222/232A/233A/242/243 V1.4 0.8MAX222/242SHDN Threshold Low µA±1MAX222/242SHDN Input Leakage Current µA 35 100TA = -55°C to +125°C MAX222/242Shutdown Supply Current 2 50TA = -40°C to +85°C V/µs 1.5 3 30MAX220 2 50 CONDITIONS TA = 0°C to +70°C CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = 5V, TA = +25°C, measured from +3V to -3V or -3V to +3V 0.1 10TA = +25°C Transition Slew Rate mA 15MAX222/232A/233A/242/243 3kΩ load both inputs VCC Supply Current (SHDN = VCC), Figures 5, 6, 11, 19 12MAX220 6 12 30MAX222/232A/233A/242/243 4 10MAX222/232A/233A/242/243 No load 0.5 2MAX220 V2.0 1.4MAX222/242 V4.5 5.5 SHDN Threshold High Operating Supply Voltage IOUT = 1.6mA (MAX220) TTL/CMOS Output Voltage Low 0.4 V IOUT = -1.0mATTL/CMOS Output Voltage High 3.5 VCC - 0.2 V Sourcing VOUT = GND -2 -10 Shrinking VOUT = VCC TTL/CMOS Output Short-Circuit Current 10 30 mA M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers 4 _______________________________________________________________________________________ __________________________________________Typical Operating Characteristics MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243 10 8 -10 0 5 15 25 OUTPUT VOLTAGE vs. LOAD CURRENT -4 -6 -8 -2 6 4 2 M AX 22 0- 01 LOAD CURRENT (mA) OU TP UT V OL TA GE (V ) 10 0 20 0.1µF EITHER V+ OR V- LOADED VCC = ±5V NO LOAD ON TRANSMITTER OUTPUTS (EXCEPT MAX220, MAX233A) V- LOADED, NO LOAD ON V+ V+ LOADED, NO LOAD ON V- 1µF 1µF0.1µF 11 10 4 0 10 40 60 AVAILABLE OUTPUT CURRENT vs. DATA RATE 6 5 7 9 8 M AX 22 0- 02 DATA RATE (kbits/sec) OU TP UT C UR RE NT (m A) 20 30 50 OUTPUT LOAD CURRENT FLOWS FROM V+ TO V- VCC = +5.25V ALL CAPS 1µF ALL CAPS 0.1µF VCC = +4.75V +10V -10V MAX222/MAX242 ON-TIME EXITING SHUTDOWN +5V +5V 0V 0V M AX 22 0- 03 500µs/div V+ , V - V OL TA GE (V ) 1µF CAPS V+ V+ V-V- SHDN 0.1µF CAPS 1µF CAPS 0.1µF CAPS 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.) 225MAX220 Receiver + to - Propagation Delay Difference (Normal Operation) ns 100MAX222/232A/233A/242/243 tPHLR - tPLHR 2000MAX220 Transmitter + to - Propagation Delay Difference (Normal Operation) ns 300 PARAMETER MIN TYP MAX UNITS MAX222/232A/233A/242/243 tPHLT - tPLHT ns600MAX222/242, 0.1µF capstDT Transmitter-Output Disable Time (SHDN Goes Low), Figure 4 µs250MAX222/242, 0.1µF caps (includes charge-pump start-up) CONDITIONS tET Transmitter-Output Enable Time (SHDN Goes High), Figure 4 M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers _______________________________________________________________________________________ 5 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 ......................................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 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 ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241 ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (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.) 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. CONDITIONS MIN TYP MAX UNITS Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground ±5.0 ±7.3 V VCC Power-Supply Current No load, TA = +25°C 5 10 mA7 15 0.4 1 V+ Power-Supply Current 1.8 5 mA 5 15 Shutdown Supply Current TA = +25°C 15 50 VInput Logic Threshold High TIN 2.0 EN, SHDN (MAX223); EN, SHDN (MAX230/235/236/240/241) 2.4 Logic Pull-Up Current TIN = 0V 1.5 200 Receiver Input Voltage Operating Range -30 30 V µA µA 1 10 VInput Logic Threshold Low TIN; EN, SHDN (MAX233); EN, SHDN (MAX230/235–241) 0.8 MAX231/239 MAX223/230/234–238/240/241 MAX232/233 PARAMETER MAX239 MAX230/235/236/240/241 MAX231 MAX223 mA M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers 6 _______________________________________________________________________________________ V 0.8 1.2 PARAMETER MIN TYP MAX UNITSCONDITIONS Normal operation SHDN = 5V (MAX223) SHDN = 0V (MAX235/236/240/241) 1.7 2.4 RS-232 Input Threshold Low TA = +25°C, VCC = 5V 0.6 1.5 VRS-232 Input Threshold High TA = +25°C, VCC = 5V Shutdown (MAX223) SHDN = 0V, EN = 5V (R4IN‚ R5IN) 1.5 2.4 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.) Shutdown (MAX223) SHDN = 0V, EN = 5V (R4IN, R5IN) Normal operation SHDN = 5V (MAX223) SHDN = 0V (MAX235/236/240/241) RS-232 Input Hysteresis VCC = 5V, no hysteresis in shutdown 0.2 0.5 1.0 V RS-232 Input Resistance TA = +25°C, VCC = 5V 3 5 7 kΩ TTL/CMOS Output Voltage Low IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA) 0.4 V TTL/CMOS Output Voltage High IOUT = -1mA 3.5 VCC - 0.4 V TTL/CMOS Output Leakage Current 0V ≤ ROUT ≤ VCC; EN = 0V (MAX223); EN = VCC (MAX235–241 ) 0.05 ±10 µA MAX223 600 nsReceiver Output Enable Time Normal operation MAX235/236/239/240/241 400 MAX223 900 nsReceiver Output Disable Time Normal operation MAX235/236/239/240/241 250 Normal operation 0.5 10 µsSHDN = 0V (MAX223) 4 40Propagation Delay RS-232 IN to TTL/CMOS OUT, CL = 150pF 6 40 3 5.1 30 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 4 30 Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V 300 Ω Transmitter Output Short-Circuit Current ±10 mA tPHLS tPLHS Transition Region Slew Rate 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 M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers _______________________________________________________________________________________ 7 8.5 6.5 4.5 5.5 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. VCC 7.0 8.0 M AX 22 0- 04 VCC (V) V O H (V ) 5.0 7.5 1 TRANSMITTER LOADED 3 TRANS- MITTERS LOADED 4 TRANSMITTERS LOADED 2 TRANSMITTERS LOADED TA = +25°C C1–C4 = 1µF TRANSMITTER LOADS = 3kΩ || 2500pF 7.4 6.0 0 2500 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 6.4 6.2 7.2 7.0 M AX 22 0- 05 LOAD CAPACITANCE (pF) V O H (V ) 15001000500 2000 6.8 6.6 160kbits/sec 80kbits/sec 20kbits/sec TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3kΩ C1–C4 = 1µF 12.0 4.0 0 2500 TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE 6.0 5.0 11.0 9.0 10.0 M AX 22 0- 06 LOAD CAPACITANCE (pF) SL EW R AT E (V /µ s) 15001000500 2000 8.0 7.0 TA = +25°C VCC = +5V LOADED, RL = 3kΩ C1–C4 = 1µF 1 TRANSMITTER LOADED 2 TRANSMITTERS LOADED 3 TRANSMITTERS LOADED 4 TRANSMITTERS LOADED -6.0 -9.0 4.5 5.5 TRANSMITTER OUTPUT VOLTAGE (VOL) vs. VCC -8.0 -8.5 -6.5 -7.0 M AX 22 0- 07 VCC (V) V O L ( V) 5.0 -7.5 4 TRANS- MITTERS LOADED TA = +25°C C1–C4 = 1µF TRANSMITTER LOADS = 3kΩ || 2500pF 1 TRANS- MITTER LOADED 2 TRANS- MITTERS LOADED 3 TRANS- MITTERS LOADED -6.0 -7.6 0 2500 TRANSMITTER OUTPUT VOLTAGE (VOL) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES -7.0 -7.2 -7.4 -6.2 -6.4 M AX 22 0- 08 LOAD CAPACITANCE (pF) V O L ( V) 15001000500 2000 -6.6 -6.8 160kbits/sec80kbits/sec 20Kkbits/sec TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3kΩ C1–C4 = 1µF 10 -10 0 5 10 15 20 25 30 35 40 45 50 TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CURRENT -2 -6 -4 -8 8 6 M AX 22 0- 09 CURRENT (mA) V+ , V - ( V) 4 2 0 V+ AND V- EQUALLY LOADED V- LOADED, NO LOAD ON V+ TA = +25°C VCC = +5V C1–C4 = 1µF ALL TRANSMITTERS UNLOADED V+ LOADED, NO LOAD ON V- __________________________________________Typical Operating Characteristics MAX223/MAX230–MAX241 *SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTS V+, V- WHEN EXITING SHUTDOWN (1µF CAPACITORS) MAX220-13 SHDN* V- O V+ � 500ms/div Input Logic Threshold Low M A X 2 2 0 –M A X 2 4 9 +5V-Powered, Multichannel RS-232 Drivers/Receivers 8 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249 ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (MAX225, VCC = 5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capa