SC18IM700 RX and TX pins - TTL or not?

[zackjohnson]

Hello,

I am thinking about using the SC18IM700 for RS-232 to I2C conversion. My question is about the RX and TX pins on this chip. Are these real RS-232 signals that go from -5V to +5V or are they TTL serial signals that only go from 0V to +5V? I could not find any information about this on the data sheet.

Also, if they do go from -5V to +5V, are these values generated internally from the 2.3V-3.6V power supply used to operate the chip?

Thanks.

[TomasVaverka]

Hello Jack,

The signal levels of the TX and RX pins are as stated on Table 11 in the datasheet.

If you want to use this device for RS-232 communication over a wire, then you will need an RS-232 line transceiver also.

Regards,

Tomas

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