User's Manual

GL865 Hardware User Guide
1vv0300910 Rev.1 – 2011-07-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 38 of 79
8. Logic level specifications
Where not specifically stated, all the interface circuits work
at 2.8V CMOS logic levels. The following table shows the logic
level specifications used in the GL865 interface circuits:
Absolute Maximum Ratings -Not Functional
Parameter Min Max
Input level on any digital
pin (CMOS 2.8) when on
-0.3V +3.1V
Input level on any digital
pin (CMOS 1.8) when on
-0.3V +2.1V
Input voltage on analog
pins when on
-0.3V +3.0 V
Operating Range - Interface levels (2.8V CMOS)
Level Min Max
Input high level
2.1V 3.1V
Input low level
0V 0.5V
Output high level
2.2V 3.1V
Output low level
0V 0.35V
For 1.8V signals:
Operating Range - Interface levels (1.8V CMOS)
Level Min Max
Input high level
1.6V 2.0V
Input low level
0V 0.4V
Output high level
1,65V 2.0V
Output low level
0V 0.35V
Current characteristics
Level Typical
Output Current 1mA
Input Current 1uA