Siemens TC65 Specifications download pdf (Page 104)

TC65 Hardware Interface Description

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TC65_HD_V02.000 Page 104 of 120 08.06.2006

5.9 Electrostatic Discharge

The GSM 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 TC65 module.

Special ESD protection provided on TC65:

Antenna interface: one spark discharge line (spark gap)

SIM interface: clamp diodes for protection against overvoltage.

The remaining ports of TC65 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.

TC65 has been tested according to the EN 61000-4-2 standard. The measured values can

be gathered from the following table.

Table 35: Measured electrostatic values

Specification / Requirements Contact discharge Air discharge

ETSI EN 301 489-7

ESD at SIM port

± 4kV ± 8kV

ESD at antenna port

± 4kV ± 8kV

Human Body Model (Test conditions: 1.5kΩ, 100pF)

ESD at all other interfaces

± 1kV ± 1kV

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

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Siemens TC65 Specifications Page 104