Network Hardware User Manual

UC864-E Hardware User Guide
1vv0300766a Rev.1 - 31/01/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 28 of 51
7 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 Telit UC864-E interface circuits:
For 2.6V CMOS signals:
Absolute Maximum Ratings -Not Functional
Parameter
UC864-E
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
Operating Range - Interface levels
Level
UC864-E
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 1.8V signals:
Operating Range - Interface levels (1.8V CMOS)
Level
UC864-E
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