Network Hardware User Manual

UC864-E Hardware User Guide
1vv0300766a Rev.1 - 31/01/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 33 of 51
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 2.9V DC). In this configuration the SP3282EB will adhere to EIA/TIA-562 voltage levels
instead of RS232 (-5 +5V)