FN3020 Rev 8.00

Page 1 of 8

October 15, 2014

FN3020

Rev 8.00

October 15, 2014

ICL232

+5V Powered, Dual RS-232 Transmitter/Receiver

DATASHEET

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.

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.

Applications

• Any system requiring RS-232 communications port

- Computer - portable and mainframe

- Peripheral - printers and terminals

- Portable instrumentation

-Modems

• Dataloggers

Features

• Meets all RS-232C and V.28 specifications

• Requires only single +5V power supply

• Onboard voltage doubler/inverter

•Low power consumption

•2 drivers

-

9V output swing for +5V lnput

- 300Ω power-off source impedance

- Output current limiting

- TTL/CMOS compatible

- 30V/µs maximum slew rate

•2 Receivers

-

30V input voltage range

-3kΩ to 7kΩ input impedance

- 0.5V hysteresis to improve noise rejection

• All critical parameters are guaranteed over the entire

commercial, industrial and military temperature ranges

• Pb-free (RoHS compliant)

+5V

2

16

11

10

14

7

13

12

8

9

1µF

6

+

1µF

4

5

+

1µF

1

3

+

1µF

+

+

1.0µF

15

V+

T1

T2

+5V

400kΩ

+5V

400kΩ

R1

5kΩ

R2

5kΩ

+10V TO -10V

VOLTAGE INVERTER V-

C2+

C2-

+5V TO 10V

VOLTAGE INVERTER

C1+

C1-

FIGURE 1. FUNCTIONAL DIAGRAM