LN920 TLB Hardware User Guide
1VV0301735 Rev. 0
Page 7 of 33
2021-07-15
Not Subject to NDA
2.
GENERAL PRODUCT DESCRIPTION
Overview
The Translation Board (TLB) is custom designed to interface the Telit LN920 M.2 data
card with the Telit Generic Evaluation Board (EVB), thus forming the complete
Development Kit of LN920.
The TLB provides mapping of Telit module signals and functions into the generic EVB
signals and functions.
The LN920 TLB includes
–
among others - the following items:
•
RF SMA connectors
•
Board to Board connectors for interfacing to EVB main board
•
Module specific circuitry which is not part of the generic circuitry of the EVB
The TLB includes a M.2 module socket, making the data card removable from the TLB.
The Power supply and control interface for the RF module is provided by the EVB through
the B2B connectors, located on the bottom side of the TLB and connecting the TLB to the
EVB.
The bottom plane solder-mask is cutout under the RF module to allow mounting a
heatsink to cool the module through the PCB
GND via’s.
The board is designed to host M.2 modems using LN920 pin mapping (42.0 x 30.0 x 2.3mm,
+/- 0.15 mm tolerance and 75 pins).
Board
PCB Code
TLB
CS2146
EVB
CS1984C or CS1742E
Module
LN920
Table 2: Latest PCB reference numbers
