Sierra Wireless HL7748 User Manual
41110555
Rev 1.0
September 21, 2017
14
Product Technical Specification
Introduction
•
1x - JTAG Interface
•
1x - Wake up signal
•
1x - Fast shutdown signal
•
1x - PWM
•
1x - Main RF Antenna
1.6.
Connection Interface
The
AirPrime HL77xx
modules are an LGA form factor device. All electrical and mechanical
connections are made through the 146 Land Grid Array (LGA) pads on the bottom side of the PCB.
Figure 2.
Mechanical Overview (Top View and Bottom View)
The 146 pads have the following distribution:
•
66 inner signal pads, 1x0.5mm, pitch 0.8mm
•
1 reserved test point (do not connect), 1.0mm diameter
•
7 test point (JTAG), 0.8mm diameter, 1.20mm pitch
•
64 inner ground pads, 1.0x1.0mm, pitch 1.825mm/1.475mm
•
4 inner corner ground pads, 1x1mm
•
4 outer corner ground pads, 1x0.9mm
Figure 3.
Actual Module (Top View)
Figure 4.
Actual Module (Bottom View)