Data Sheet

ISM4343 Specification
DOC-DS-20074-5.3
Inventek Systems
Page 5
2 OVERVIEW
The Inventek ISM4343-WBM-L151 SiP (10x10mm) and ISM4343-WBM-L54 module
(15x34mm) offer a single-band IEEE 802.11 b,g,n-compliant MAC/PHY, and BT/BLE 5.1
radio. Channel bandwidth of 20MHz is supported for IEEE 802.11 b,g,n traffic with
integrated ST Micro STM32F412 Cortex M4 MCU that runs the TCP/IP stack.
This data sheet contains pinout information for both the ISM4343-WBM-L151 SiP and
ISM4343-WBM-L54 module. The module includes either a chip antenna or U.FL
connector for an external antenna. The SiP does not include an antenna. Please refer
to Inventek’s Layout Guidelines for the certified reference design information.
The ISM4343-WBM-L151 SiP integrates the Wi-Fi/BT radio, Cortex M4 microcontroller,
clocks and an additional 2MB of Flash into a small form factor 10x10 mm LGA Module.
The ISM4343-WBM-L151 802.11 b/g/n enables wireless connectivity to the simplest
existing sensor products with minimal engineering effort. The ISM4343-WBM-L151
reduces development time, lowers manufacturing costs, saves board space, simplifies
certification compliance, and minimizes customer RF expertise required during
development of target applications.
The ISM4343-WBM-L54 module combines the ISM4343-WBM-L151 SiP with two
separate antenna options, an on-board single band 2.4 GHz chip antenna or a U.FL
connector for an external 2.4GHz antenna. Inventek certified the W24P-U PCB antenna
for use with the ISM4343-WBM-L151 SiP and ISM4343-WBM-L54-U module. The
module’s foot print (14.5 mm x 34 mm) and ease of design-in make it ideal for a range
of embedded applications.
The ISM4343 SiP and Module use Cypress Semiconductor’s CYW4343 highly integrated
single chip combo radio solution. The CYW4343 has integrated power amplifiers, LNAs
and T/R switches for the 2.4 GHz WLAN band.
The ISM4343 SiP and module include an ST Micro STM32F412 Cortex M4 MCU with
256KB of RAM and 1 MB of Flash. SPI and UART interfaces enable easy connection to
an embedded design. The ISM4343-WBM-L151 SiP and module require no operating
system. The ISM4343 SiP and module support Inventek’s IWIN AT commands or the
Cypress’ WICED Platform SDK.
The ISM4343 is compatible with the BT Low Energy operating mode, which provides a
dramatic reduction in the power consumption of the BT radio and baseband. The primary
application for this mode is to provide support for low data rate devices, such as sensors
and remote controls.
The ISM4343 implements the highly sophisticated Enhanced Collaborative Coexistence
algorithms and hardware mechanisms, allowing for an extremely collaborative BT
coexistence scheme along with coexistence support for external radios such as cellular