USGlobalsat EB-5531 - Manual (Page 4)

EB-5531
High Performance GPS Engine Board
2010/8/2 - 4 -
Electrical Specification
Absolute Maximums Ratings
Parameter Min. Typ. Max. Conditions Unit
POWER Supply
Main power supply 3.1 3.3 3.5 V
Backup battery supply 2.0 3.5 V
Main power supply Current 23 25 27 mA
Backup battery supply Current 4.5 5 5.5 uA
Interface (VCC = 3.3V, VBAT= 3.3V, Operation Temp.= 25
℃)
High Level input Voltage 0.7*VDD 3.5 V
Low Level input Voltage -0.3 0.3*VDD V
High Level input Current -10 10
60
(V=2.85V)
(with Pull Low)
uA
Low Level input Current -10 10
-60
(V=0V)
(with Pull High)
uA
High Level output Voltage 0.75*VDD V
Low Level output Voltage 0.25*VDD V
RF Input
Input Impedance 50
Ω
Operating Frequency 1.575 Ghz
☆VDD is 3.3V for SiRF IV GSD4e CHIP