Document
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.
The MAX220-MAX249 are offered in 26 different packages with temperatures from 0 to +70°C up to -55°C to +125°C. See ordering information table at the end of the data sheet for all package and temperature options.
Applications
• Interface Translation • Multidrop RS-232 Networks • Portable Diagnostics Equipment
AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc.
Benefits and Features
Saves Board Space
• Integrated Charge Pump Circuitry
• Eliminates the Need for a Bipolar ±12V Supply • Enables Single Supply Operation from +5V Supply
• Integrated Capacitors (MAX223, MAX233, MAX235,
MAX245-MAX247) Saves Power for Reduced Power Requirements
• 5µW Shutdown Mode
Ordering Information and Selection Table appears at end of data sheet.
MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
TOP VIEW
+
C1+ 1
V+ 2
C1- 3
C2+ 4 C2- 5
V- 6
MAX220 MAX232 MAX232A
T2OUT 7
R2IN 8
16 VCC 15 GND 14 T1OUT 13 R1IN 12 R1OUT 11 T1IN 10 T2IN 9 R2OUT
DIP/SO
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
+5V INPUT C3
C1 C2
TTL/CMOS INPUTS
C5
16
1 C1+
3 C14 C2+ 5 C2-
VCC +5V TO +10V VOLTAGE DOUBLER
+10V TO -10V VOLTAGE INVERTER
V+ 2 +10V
V- 6 -10V C4
+5V 400kΩ 11 T1IN
T1OUT 14
+5V
400kΩ 10 T2IN
T2OUT 7
RS-232 OUTPUTS
TTL/CMOS OUTPUTS
12 R1OUT 9 R2OUT
R1IN 13
5kΩ R2IN 8
5kΩ GND
15
RS-232 INPUTS
19-4323; Rev 17; 1/15
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)
PARA.