User Connector Pin Allocation - Iridium 9523 Product Developer Manual

Iridium Communications, Inc. Information Contained in this Guide
Iridium 9523 Product Developer's Guide is Subject to Change Without Notice
Revision 7.0
Figure 5: Pin numbering scheme for User Connector
Molex 54102-0404 on Iridium 9523: Molex 53885-0408 on FA PCB:
Figure 6 provides a reference for the pin designation and shows the connector's location and rotation with
respect to the corner of the Iridium 9523 board. This view is for illustrative purposes only. This view
designation is when looking into the user connector towards the Iridium 9523.
Figure 6: User Connector Pin Number Designation
3.1.2

User Connector Pin Allocation

The user connector is a 2-row 40-way header. Individual pin assignments are shown in Table 6 and the
limits for the digital signals are listed in Table 7. Multiple supply grounds are provided and all supply rails
and supply grounds are required to be connected to the power supply in order to limit the current on any
one pin.
Note that the Iridium 9523 provides limited ESD protection on its digital I/O signals: Human Body Model
2kV and Machine Model 200V ESD protection. Partners should design their FA boards to include
appropriate ESD protection on these signals.
Table 6: User Connector Pin Allocation
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