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DATASHEET
ICL232
FN3020
Rev 8.00
October 15, 2014
+5V Powered, Dual RS-232 Transmitter/Receiver
The ICL232 is a dual RS-232 transmitter/receiver interface
circuit that meets all ElA RS-232C and V.28 specifications. It
requires a single +5V power supply, and features two onboard
charge pump voltage converters which generate +10V and
-10V supplies from the 5V supply.
Features
The drivers feature true TTL/CMOS input compatibility,
slew-rate-limited output, and 300Ω power-off source
impedance. The receivers can handle up to +30V, and have a
3kΩ to 7kΩ input impedance. The receivers also have
hysteresis to improve noise rejection.
• Low power consumption
• Meets all RS-232C and V.28 specifications
• Requires only single +5V power supply
• Onboard voltage doubler/inverter
• 2 drivers
- 9V output swing for +5V lnput
- 300Ω power-off source impedance
- Output current limiting
- TTL/CMOS compatible
- 30V/µs maximum slew rate
Applications
• Any system requiring RS-232 communications port
- Computer - portable and mainframe
- Peripheral - printers and terminals
- Portable instrumentation
- Modems
• 2 Receivers
- 30V input voltage range
- 3kΩ to 7kΩ input impedance
- 0.5V hysteresis to improve noise rejection
• Dataloggers
• All critical parameters are guaranteed over the entire
commercial, industrial and military temperature ranges
• Pb-free (RoHS compliant)
+5V
+
1.0µF
1
1µF
+
3
4
1µF
T1IN
T2IN
R1OUT
R2OUT
+
5
C1+
C1C2+
C2-
16
VCC
2
+5V TO 10V
VOLTAGE INVERTER V+
+10V TO -10V
VOLTAGE INVERTER
11
+5V
400kΩ
T1
10
+5V
400kΩ
T2
+
V- 6
+
14
7
12
13
R1
5kΩ
R2
5kΩ
9
1µF
8
1µF
T1OUT
T2OUT
R1IN
R2IN
15
FIGURE 1. FUNCTIONAL DIAGRAM
FN3020 Rev 8.00
October 15, 2014
Page 1 of 8
ICL232
Pin Configuration