User's Manual

HE910 Hardware User Guide
1vv0300925 Rev.9 – 07-02-2012
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 46 of 80
7 Logic level specifications
The following table shows the logic level specifications used in the HE910 interface
circuits:
Absolute Maximum Ratings -Not Functional
Parameter
Min
Max
Input level on any digital pin (CMOS 1.8) with
respect to ground
-0.3V
3.1V
Operating Range - Interface levels (1.8V CMOS)
Level
Min
Max
Input high level
1.5V
1.9V
Input low level
0V
0.35V
Output high level
1.6V
1.9
Output low level
0V
0.2V
Current characteristics (Preliminary values)
Level
Typical
Output Current
100uA
Input Current
1uA