Power Interface; Overview Of Operation; Power Signals; Electrostatic Discharge (Esd) - Sierra Wireless MC5725V Hardware Integration Manual

2: Power Interface

Rev 1.8.2 Oct.08
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.

Overview of operation

Note: This chapter contains information for CDMA (MC57xx) and
GSM (MC87xx) modules.
Information that is unique to specific module types is clearly
identified.
The module is designed to use a 3.3V (nominal) power supply,
provided by the host. It is the host's responsibility to provide
safe and continuous power to the module at all times; the
module does NOT have an independent power supply, or
protection circuits to guard against electrical issues.
The module's power state is controlled by the host's assertion /
de‐assertion of the
W_Disable#
monitors its supply voltage and requests shutdown if the
supply is insufficient.

Power signals

The module must be connected to a 3.3V power supply (as
described in PCI Express Mini Card Electromechanical Specifi‐
cation Revision 1.1).
The MC87xx has more power pins than the MC57xx due to
higher peak current requirements for GSM devices.
For detailed pinout and voltage / current requirements of these
modules, see the Product Specification Document for your
Mini Card.

Electrostatic discharge (ESD)

You are responsible for ensuring that the host has adequate
ESD protection on digital circuits and antenna ports:
• (Operational) RF port (antenna launch and RF connector):
IEC‐61000‐4‐2 — Level (Electrostatic Discharge Immunity Test)
(Non‐operational) Host connector interface:
•
JESD22‐A114‐B +/‐ 1kV Human Body Model and
JESD22‐C101 +/‐ 125 V Charged Device Model
Specific recommendations are provided where needed in this
guide, however, the level of protection required depends on
your application.
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signal. The module also
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