User's Manual

UC864-G Hardware User Guide
DRAFT
- 29/10/07
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 56 of 66
12.1 Logic level specifications
Where not specifically stated, all the interface circuits work at 2.6V CMOS logic levels.
The following table shows the logic level specifications used in the
UC864-G interface circuits:
Absolute Maximum Ratings -Not Functional
UC864-G
Parameter
Min Max
Input level on any
digital pin when on
-0.3V +3.0V
Input voltage on
analog pins when on
-0.3V +3.0 V
For 2.6V CMOS signals;
Operating Range - Interface levels
UC864-G
Level
Min Max
Input high level 2.0V 2.9 V
Input low level -0.3V 0.6V
Output high level 2.2V 2.6V
Output low level 0V 0.35V
For 2,0V signals:
Operating Range - Interface levels (2.0V CMOS)
UC864-G
Level
Min Max
Input high level 1.5V 2.1V
Input low level -0.3V 0.5V
Output high level 1.4V 1.8V
Output low level 0V 0.35V