Single-Chip, Dual-Band (2.4 GHz/5 GHz)
IEEE 802.11 a/b/g/n MAC/Baseband/
Radio with Integrated Bluetooth 5.0
The Cypress CYW43340 single–chip quad–radio device provides the highest level of integration for wearables, Internet of Things and
gateway applications, with integrated dual band (2.4 GHz / 5 GHz) IEEE 802.11 a/b/g and single–stream IEEE 802.11n MAC/
baseband/radio, and Bluetooth 5.0. The CYW43340 includes integrated power amplifiers and LNAs for the 2.4 GHz and 5 GHz WLAN
bands, and an integrated 2.4 GHz T/R switch. This greatly reduces the external part count, PCB footprint, and cost of the solution.
Using advanced design techniques and process technology to reduce active and idle power, the CYW43340 is designed to address
the needs of mobile devices that require minimal power consumption and compact size. It includes a power management unit which
simplifies the system power topology and allows for operation directly from a mobile platform battery while maximizing battery life.
The CYW43340 implements the highly sophisticated Enhanced Collaborative Coexistence algorithms and hardware mechanisms,
allowing for an extremely collaborative Bluetooth coexistence scheme along with coexistence support for external radios (such as
cellular and LTE, GPS, WiMAX, and Ultra–Wideband) and a single shared 2.4 GHz antenna for Bluetooth and WLAN. As a result,
enhanced overall quality for simultaneous voice, video, and data transmission in an IoT or wearable application is achieved.
For the WLAN section, two host interface options are included: an SDIO v2.0 interface and a High-Speed Inter-Chip (HSIC) interface
(a USB 2.0 derivative for short-distance on-board connections). An independent, high-speed UART is provided for the Bluetooth host
Cypress Part Numbering Scheme
Cypress is converting the acquired IoT part numbers from Broadcom to the Cypress part numbering scheme. Due to this conversion,
there is no change in form, fit, or function as a result of offering the device with Cypress part number marking. The table provides
Cypress ordering part number that matches an existing IoT part number.
Table 1. Mapping Table for Part Number between Broadcom and Cypress
Broadcom Part Number
Cypress Part Number
Acronyms and Abbreviations
In most cases, acronyms and abbreviations are defined on first use.
For a comprehensive list of acronyms and other terms used in Cypress documents, go to http://www.cypress.com/glossary.
IEEE 802.11x Key Features
■ Dual–band 2.4 GHz and 5 GHz IEEE 802.11
■ Single–stream IEEE 802.11n support for 20 MHz and 40 MHz
channels provides PHY layer rates up to 150 Mbps for typical
upper–layer throughput in excess of 90 Mbps.
■ Supports the IEEE 802.11n STBC (space–time block coding)
RX and LDPC (low–density parity check) TX options for
improved range and power efficiency.
■ Supports a single 2.4 GHz antenna shared between WLAN and
■ Shared Bluetooth and 2.4 GHz WLAN receive signal path elimi-
nates the need for an external power splitter while maintaining
excellent sensitivity for both Bluetooth and WLAN.
■ Internal fractional nPLL allows support for a wide range of
reference clock frequencies
■ Supports IEEE 802.15.2 external coexistence interface to
optimize bandwidth utilization with other co–located wireless
technologies such as GPS, WiMAX, or UWB
■ Supports standard SDIO v2.0 host interfaces.
■ Alternative host interface supports HSIC v1.0 (short–distance
■ Integrated ARM® Cortex–M3™ processor and on–chip
memory for complete WLAN subsystem functionality,
minimizing the need to wake up the applications processor for
standard WLAN functions. This allows for further minimization
of power consumption, while maintaining the ability to field
upgrade with future features. On–chip memory includes 512
KB SRAM and 640 KB ROM.
■ OneDriver™ software architecture for easy migration from
existing embedded WLAN and Bluetooth devices as well as
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-14943 Rev. *M
• San Jose, CA 95134-1709 • 408-943-2600
Revised Monday, July 23, 2018