> 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: RF choke decoupled 100nF capacitor
> 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 39: | 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: 1.5k Ω, 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 com puter or other equipment, such as the Siemens reference application described in Chapter 8.