User guide

UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 44 of 78
8.3. 5V UART Level Translation
If the OEM application uses a microcontroller with a serial port (UART) that works at
a voltage different from 2.6 – 2.9V, then a circuitry has to adapt the different levels of
the two signal sets. As for the RS232 translation, there are a multitude of single chip
translators. For example a possible translator circuit for a 5V
TRANSMITTER/RECEIVER can be: