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GE864 Hardware User Guide
1vv0300694 Rev.10 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 19 of 69
5 Power Supply
The power supply circuitry and board layout are a very important part in the full product design and
they strongly reflect on the product overall performances, hence read carefully the requirements and
the guidelines that will follow for a proper design.
5.1 Power Supply Requirements
POWER SUPPLY
Nominal Supply Voltage 3.8V
Max Supply Voltage 4.2
Supply Voltage Range 3.4 – 4.2
The GE864-QUAD / PY power consumptions are:
GE864-QUAD/PY
Mode Average (mA) Mode description
IDLE mode
Stand by mode; no call in progress
AT+CFUN=1 23,9 Normal mode: full functionality of the module
AT+CFUN=4 22
Disabled TX and RX; module is not registered on the
network
AT+CFUN=0 or
AT+CFUN=5
7,20 / 3,56
3
Power saving: CFUN=0 module registered on the network
and can receive voice call or an SMS; but it is not possible
to send AT commands; module wakes up with an
unsolicited code (call or SMS) or rising RTS line. CFUN=5
full functionality with power saving; module registered on
the network can receive incoming calls and SMS
RX mode
1 slot in downlink 52,3
2 slot in downlink 65,2
3 slot in downlink 78,6
4 slot in downlink 88,4
GSM Receiving data mode
GSM TX and RX mode
Min power level 78,1
Max power level 200,1
GSM Sending data mode
GPRS (class 10) TX and RX mode
Min power level 123,7
Max power level 370,8
GPRS Sending data mode
1
Worst/best case depends on network configuration and is not under module control