User's Manual
Table Of Contents
- Version History
- Contents
- Table Index
- Figure Index
- 1Introduction
- 2 Package Information
- 3 Interface Application
- 4 RF Specifications
- 5 Electrical Specification
- 6 SMT Production Guide
- 7 Packaging
- 8 Appendix
SIM7600G-H User manual
www.simcom.com
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Figure 23: USIM interface reference circuit with USIM_DET
If the USIM card detection function is not used, user can keep the USIM_DET pin open.
SIM card circuit is susceptible, the interference may cause the SIM card failures or some other situations,
so it is strongly recommended to follow these guidelines while designing:
Make sure that the SIM card holder should be far away from the antenna while in PCB layout.
SIM traces should keep away from RF lines, VBAT and high-speed signal lines.
The traces should be as short as possible.
Keep SIM holder’s GND connect to main ground directly.
Shielding the SIM card signal by ground.
Recommended to place a 0.1～1uF capacitor on USIM_VDD line and keep close to the holder.
The rise/fall time of USIM_CLK should not be more than 40ns.
Add some TVS and the parasitic capacitance should not exceed 60pF.
Recommended USIM Card Holder
It is recommended to use the 6-pin USIM socket such as C707 10M006 512 produced by Amphenol. User
can visit http://www.amphenol.com for more information about the holder.