User's Manual

HC864-AUTO Hardware User Guide
1vv0300946 Rev.4 – 2012-12-27
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Reserved. Page 45 of 77
An example of level translation circuitry of this kind is:
The example is done with a SIPEX SP3282EB RS232 Transceiver that could accept supply
voltages lower than 3V DC.
NOTE:
In this case Vin has to be set with a value compatible with the logic levels of the module
(Max 2.6V DC). In this configuration the SP3282EB will adhere to EIA/TIA-562 voltage
levels instead of RS232 (-5 ~ +5V)
Second solution could be done using a MAXIM transceiver (MAX218) In this case the
compliance with RS232 (+-5V) is possible.