Data Sheet

ISM4343 Specification
DOC-DS-20074-5.3
Inventek Systems
Page 53
16 ISM4343-WBM-L54 Antenna Keep-Out Area
There should be no copper (ground or traces) in the antenna keep-out area shown in Section 15.1.
In all cases the keep-out area must be placed as close to the PCB board edge as possible.
The keep out area should be extended to the edge of the PCB board.
If the Module or SiP/Antenna cannot not be placed in a corner it can be moved along the edge
of the PCB board toward the center line (but exceeding it).
Keep out area should ideally have the antenna hanging off the side of the PCB for best
performance. If you do not hang the antenna off the PCB, ensure no FR4 or ground planes or
traces are placed under the antenna (keep out area). Surrounding metal will affect the antenna
performance. Inventek recommends a 9mm clearance on all three sides. The external antenna
does not require “keep out” area.
17 On Board OTA Flash
The ISM4343-WBM-L151 and ISM4343-WBM-L54 includes 2 MB SPI flash for OTA.
Standard Product
ISM4343-WBM-L151
2 MB Flash
ISM4343-WBM-L54
2 MB Flash
Internal Flash Part Number: Macronix MX25L1633.
Figure 2 Module Dimensions - Top View