This circuit shows an ICL232 that is connected as a simple duplex RS-232 port with CTS/RTS handshaking. Fixed output signals, such as DTR (data terminal ready) and DSRS (data signaling rate select), are generated by driving them through a 5-kΩ resistor that is connected to V+. Harris Semiconductor. Data Acquisition 1991 p 136
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, slewrate-limited output, and 300W power-off source impedance. The receivers can handle up to +30V, and have a 3kW to 7kW input impedance. The receivers also have hysteresis to improve noise rejection.
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• Any System Requiring RS-232 Communications Port- Computer - Portable and Mainframe- Peripheral - Printers and Terminals- Portable Instrumentation- Modems• Dataloggers
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• 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- 300W Power-off Source Impedance- Output Current Limiting- TTL/CMOS Compatible- 30V/ms Maximum Slew Rate• 2 Receivers- ±30V Input Voltage Range- 3k to 7k Input Impedance- 0.5V Hysteresis to Improve Noise Rejection• All Critical Parameters are Guaranteed Over the Entire Commercial, Industrial and Military Temperature Ranges
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VCC to Ground . . . . . .. . . . . . . . . . . . .(GND -0.3V) < VCC < 6V
V+ to Ground . . . . . . . . . . . . . . . . . . . (VCC -0.3V) < V+ < 12V
V- to Ground . . . . . . . . . . . . . . . . . . -12V < V- < (GND +0.3V)
Input Voltages
T1IN, T2IN. . . . . . . . . . . . . . . . . (V- -0.3V) < VIN < (V+ +0.3V)
R1IN, R2IN . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . ±30V
Output Voltages
T1OUT, T2OUT . . . . . .. . . . . (V- -0.3V) < VTXOUT < (V+ +0.3V)
R1OUT, R2OUT. . . . .. . . .(GND -0.3V) < VRXOUT < (VCC +0.3V)
Short Circuit Duration T1OUT, T2OUT . . . . . . . . . . Continuous
R1OUT, R2OUT. . . . . . . . . . . . . .. . . . . . . . . . . . . . Continuous
Post a Buying Lead
Required Field 
