User's Guide

LM940 HW Design Guide
1VV0301352 Rev. 2 Page 39 of 68 2017-07-19
Information – Consider placing a low-capacitance ESD protection
component to protect LM940 against ESD strikes
If an ESD protection should be added, the suggested connectivity is as follows:
ESD Protection for USB2.0
ESD Protection for USB3.0
6.5.2. SIM Interface
The LM940 supports two external SIM interfaces (1.8V or 2.85V).
Below table lists the SIM interface signals.
SIM Interface Signals
PIN Signal I/O Function Type Comment
SIM Card Interface 1