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SARA and LARA modules are also form-factor compatible with the u-blox LISA and TOBY cellular module families:
although SARA, LARA, LISA (33.2 x 22.4 mm, 76-pin LCC) and TOBY (35.6 x 24.8 mm, 152-pin LGA) modules
each have different form factors, the footprints of all the SARA, LARA, LISA and TOBY modules have been
developed to ensure layout compatibility.
With the u-blox "nested design" solution, any SARA, LARA, LISA or TOBY module can be alternatively mounted
on the same space of a single "nested" application board as described in Figure 74, enabling straightforward
development of products supporting different cellular radio access technologies.
Figure 74: Nested design concept description: SARA, LARA, LISA and TOBY modules alternatively mounted on the same PCB
A different top-side stencil (paste mask) is needed for each form factor (SARA, LARA, LISA and TOBY) to be
alternatively mounted on the same space of a single "nested" application board, as described in Figure 75.
ANT pad
TOBY
TOBY mounting option
with TOBY paste mask
Figure 75: Top-side stencil (paste mask) designs to alternatively mount SARA, LARA, LISA and TOBY modules on the same PCB
Detailed guidelines to implement a nested application board, a comprehensive description of the u-blox reference
nested design and detailed comparisons between the u-blox SARA, LARA, LISA and TOBY modules are provided
in the Nested Design Application Note [26].
UBX-16010573 - R12
TOBY cellular module
LISA cellular module
LARA cellular module
SARA cellular module
Nested application board
ANT pad
LISA
LISA mounting option
with LISA paste mask
LARA-R2 series - System Integration Manual
ANT pad
SARA
SARA mounting option
with SARA paste mask
ANT pad
LARA
LARA mounting option
with LARA paste mask
Appendix
Page 146 of 157
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