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What does this chip do?

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EngIntoHW

Member
I saw this IC ICL3223 in schematics which i'm reviewing.

I think that it is used to allow communication between RS232 and microcontroller.
However, RS232 requires DC levels of ±12V, and this IC's VCC is ranged from 3V to 5.5V.

Can RS232 interpret DC levels of ±3V?
 

BrownOut

Banned
I saw this IC ICL3223

I think that it is used to allow communication between RS232 and microcontroller.
However, RS232 requires DC levels of ±12V, and this IC's VCC is ranged from 3V to 5.5V.

These chips typically have an internal DC/DC convertor, usually a charge pump, that converts the lower Vcc to +/-12V used by RS232.
 

EngIntoHW

Member
Thanks guys.

I want the PC to interface this IC through a serial port (RS232) cable.

Could you help me figure out how to connect the IC's pins to the RS232 pins?
I read about the RS232's pinout, however I couldnt perform an one-to-one matching.

This is the IC's pinout:

**broken link removed**
 
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