Rainbow Electronics GM862-GPS - Manual (Page 17)

GM862-GPS Hardware User Guide
1vv0300728 Rev. 8 - 20/09/07
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 17 of 73
4.5 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
Telit GM862-GPS interface circuits:
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 -0.3V +3.0 V
Voltage on Buffered
pins -0.3V 25V
Operating Range - Interface levels (2.8V CMOS)
Level Min Max
Input high level 2.1V 3.3V
Input low level 0V 0.5V
Output high level 2.2V 3.0V
Output low level 0V 0.35V
For 2,0V signals:
Operating Range - Interface levels (2.0V CMOS)
Level Min Max
Input high level 1.6V 3.3V
Input low level 0V 0.4V
Output high level 1,65V 2.2V
Output low level 0V 0.35V