User's Manual

LE910 Hardware User Guide
1vv0301089 Rev.3 – 09-06-2014
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 53 of 79
An example of RS232 level adaptation circuitry could be done using a MAXIM transceiver
(MAX218)
In this case the chipset is capable to translate directly from 1.8V to the RS232 levels (Example
done on 4 signals only).
NOTE:
In this case the length of the lines on the application has to be carefully checked to avoid
problems in case of High Speed data rates on RS232.
The RS232 serial port lines are usually connected to a DB9 connector with the following layout: