Integration Manual

HMS1 Hardware Interface Description
Confidential / Preliminary
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HMS1_HD_V01.62 Page 34 of 39 2006-08-21
5.8. Electrostatic Discharge
The HSDPA engine is not protected against Electrostatic Discharge (ESD) in general.
Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive
components. Proper ESD handling and packaging procedures must be applied throughout
the processing, handling and operation of any application that incorporates a HMS1 module.
Special ESD protection provided on HMS1:
• Antenna interface: one discharge circuit
• SIM interface: serial resistor, clamp diodes for protection against over voltage.
• The remaining parts of HMS1 are not accessible to the user of the final product (since
they are installed within the device) and therefore, are only protected according to the
“Human Body Model” requirements.
HMS1 has been tested according to the EN 61000-4-2 standard. The measured values can
be gathered from the following table.
Table 14: Measured electrostatic values
Specification / Requirements Contact discharge Air discharge
CE ETS 300342-1 (June 1997)
ESD at SIM port
± 4kV ± 8kV
ESD at antenna port
± 4kV ± 8kV
ESD at 3.6V in, GND
± 4kV ± 8kV
Human Body Model (Test conditions: 1.5kΩ, 100pF)
ESD at SIM port
± 8kV ± 15kV
ESD at antenna port
± 8kV ± 15kV
ESD at 3.6V in, GND
± 8kV ± 15kV
Note: Please note that the values may vary with the individual application design. For
example, it matters whether or not the application platform is grounded over external
devices like a computer or other equipment, such as the Siemens reference
application described in Chapter 7.