User's Guide
UC864-E-AUTO / AWS-AUTO Hardware User Guide
1vv0300795 Rev.11 – 2010/11/18
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 54 of 78
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-E-AUTO /
AWS-AUTO interface circuits:
Absolute Maximum Ratings
Absolute Maximum Ratings Absolute Maximum Ratings
Absolute Maximum Ratings -
--
-Not Functional
Not FunctionalNot Functional
Not Functional
Parameter
ParameterParameter
Parameter
UC864
UC864UC864
UC864-
--
-E
EE
E-
--
-AUTO
AUTOAUTO
AUTO
/ AWS
/ AWS/ AWS
/ AWS-
--
-AUTO
AUTOAUTO
AUTO
Min
MinMin
Min
Max
MaxMax
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
Operating Range Operating Range
Operating Range -
--
-
Interface levels
Interface levelsInterface levels
Interface levels
Level
LevelLevel
Level
UC864
UC864UC864
UC864-
--
-E
EE
E-
--
-AUTO
AUTOAUTO
AUTO
/ AWS
/ AWS/ AWS
/ AWS-
--
-AUTO
AUTOAUTO
AUTO
Min
MinMin
Min
Max
MaxMax
Max
Input high level 2.0V 2.9 V
Input low level -0.3V 0.6V
Output high level 2.15V 2.6V
Output low level 0V 0.45V
For 1.8V signals:
Operating Range
Operating Range Operating Range
Operating Range -
--
-
Interface levels (1.8V CMOS)
Interface levels (1.8V CMOS)Interface levels (1.8V CMOS)
Interface levels (1.8V CMOS)
Level
LevelLevel
Level
UC864
UC864UC864
UC864-
--
-E
EE
E-
--
-AUTO
AUTOAUTO
AUTO
/ AWS
/ AWS/ AWS
/ AWS-
--
-AUTO
AUTOAUTO
AUTO
Min
MinMin
Min
Max
MaxMax
Max
Input high level 1.5V 2.1V
Input low level -0.3V 0.5V
Output high level 1.35V 1.8V
Output low level 0V 0.45V