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 communica-
tions 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 pack-
ages 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.
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.
Applications
•
Interface Translation
•
Multidrop RS-232 Networks
•
Portable Diagnostics Equipment
AutoShutdown and UCSP are trademarks of Maxim Integrated
Products, Inc.
MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
+5V INPUT
C3
TOP VIEW
C5
C1+ 1
V+ 2
C1- 3
C2+ 4
C2- 5
V- 6
T2OUT 7
R2IN 8
+
16 V
CC
15 GND
14 T1OUT
C1
C2
16
V
CC
C1+
+5V TO +10V
3 C1-
VOLTAGE DOUBLER
4
C2+
+10V TO -10V
5 C2- VOLTAGE INVERTER
1
+5V
400kΩ
11 T1IN
V+ 2 +10V
6
-10V
C4
V-
MAX220
MAX232
MAX232A
13 R1IN
12 R1OUT
11 T1IN
10 T2IN
9
R2OUT
TTL/CMOS
INPUTS
T1OUT 14
RS-232
OUTPUTS
T2OUT 7
+5V
400kΩ
10 T2IN
12 R1OUT
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
TTL/CMOS
OUTPUTS
R1IN 13
5kΩ
RS-232
INPUTS
9 R2OUT
R2IN 8
5kΩ
GND
15
19-4323; Rev 17; 1/15
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
