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

2: Power Interface

Rev 2.02 Sep.10

Overview of operation

Note: This chapter contains information for both CDMA (MC57xx) and GSM
(MC8xxx) AirPrime embedded modules.
Information that is unique to specific module types is clearly identified.
AirPrime embedded modules are designed to use a 3.3V (nominal)
power supply (3.8V for the MC8201) 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# signal. The module also 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 (3.8V for the
MC8201), as described in PCI Express Mini Card Electromechanical
Specification Revision 1.1.
The MC8xxx 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 AirPrime
embedded module (see

Electrostatic discharge (ESD)

You are responsible for ensuring that the host has adequate ESD
protection on digital circuits and antenna ports as described by the
following specifications:
• (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
• MC5728V only: (Non-operational) Host connector interface:
JESD22-A114-B +/- 125V Human Body Model and
JESD22-C101 +/- 100 V Charged Device Model
MC5728V has placeholders for additional ESD devices, for
cases where the device must, per customer requirements, meet
the higher Human Body Model (+/-1kV) ESD rating.
Proprietary and Confidential
Table 1-2 on page 9).
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