MAX220_15 Datasheet, PDF (1/39 Pages) Maxim Integrated Products – +5V-Powered, Multichannel RS-232 Drivers/Receivers

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.
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 _C1-
4 _C2+
5 _C2-
V_CC
+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