User's Manual

URD1 – OTL 5696.1– 022 / 72740 Edition 0.4 HILONC- 3GPS APPLICATION NOTE
from the operating system or from the host controller.
Note: The module cannot enter sleep mode if USB bus is connected.
5. ESD & EMC Recommendations
Adopting the Human Body Model of the JEDEC JESD 22-A114 standard, the HILONC-3GPS can support 2KV
on each LGA pad.
5.1. HILONC-3GPS Handling
HILONC-3GPS modules are packaged in boxes.
HILONC-3GPS modules contain electronic circuits sensitive to the electrostatic electricity of the human hand.
Handling without ESD protection could result in permanent damage or even destruction of the module.
5.2. ESD Recommendations
If cust
omer’s design
requires the ability to withstand more than 2KV of electrostatic discharge, the following
must be observed:
ESD current is able to penetrate into the device via the following typical components:
· SIM connector
· Battery / data connector
· A
ll parts with conductive paint.
 as much as possible try to decrease the level of ESD current on electronic
components located inside the device (customer’s board,
HILONC-3GPS inputs
, etc…)
5.2.1. Avoiding ESD
 HILONC-3GPS
to the customer’s board.
 ould be shielded and FPC connectors should be correctly grounded at each extremity.
 Put a 100nF capacitor to the battery, or even better put a varistor or ESD diode in parallel on battery and
charger wires (if any) and on all power wires connected to the module.
Following are the pin numbers to be protected from discharge of over 2KV and the varistor references.
Pin29/43/44: VBAT
Pin67/68/69: USB
Pin71: VGPIO
Pin33/34/35/79: USIM
5.3. EMC recommendations
To avoid EMC issues, place the capacitors or filters as close as possible to high speed data lines such as USB
and SDIO.
6. Radio Integration
Note d’étude / Technical document :
01/08/20111 - Page 24 / 41
Part
Vendor
Part number
Varistor
LITTLEFUSE
V0402MHS12NR
Varistor (for USB line)
COOPER
0402ESDA-MLP1