User's Guide

HE863 Family Hardware User Guide
1vv0300891 Rev.5
- 2011-03-18
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights
Reserved. Page 59 of 89
8. Logic Level Specifications
Where not specifically stated, all the interface circuits work
at 1.8V CMOS logic levels. The following table shows the logic
level specifications used in the Telit HE863 Family interface
circuits:
For 1.8V CMOS signals:
Absolute Maximum Ratings -Not Functional
Parameter Min Max
Input level on
any digital pin
when on
-0.3V +3.6V
Input voltage
on analog pins
when on
-0.15V +3.0 V
Operating Range - Interface levels
Level Min Max
Input high
level
1.26V 2.0 V
Input low level -0.2V 0.36V
Output high
level
1.6V 1.8V
Output low
level
0V 0.2V