Single-Chip 5G WiFi IEEE 802.11n/ac MAC/
Baseband/ Radio with Integrated Bluetooth 5.0
The Cypress CYW43455 single-chip device provides the highest level of integration for Internet of Things applications and handheld
wireless system with integrated single-stream IEEE 802.11ac MAC/baseband/radio and, Bluetooth 5.0.
In IEEE 802.11ac mode, the WLAN operation supports rates of MCS0–MCS9 (up to 256 QAM) in 20 MHz, 40 MHz, and 80 MHz
channels for data rates of up to 433.3 Mbps. All rates specified in the IEEE 802.11a/b/g/n are supported. Included on-chip are 2.4 GHz
and 5 GHz transmit amplifiers and receive low-noise amplifiers. Optional external PAs and LNAs are also supported.
The WLAN section supports the following host interface options: an SDIO v3.0 interface that can operate in 4b or 1b mode, a
high-speed 4-wire UART, and a PCIe1Gen1 (3.0 compliant) interface. The Bluetooth section supports a high-speed 4-wire UART
Using advanced design techniques and process technology to reduce active and idle power, the CYW43455 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 direct operation from a mobile platform battery while maximizing battery life.
The CYW43455 implements highly sophisticated enhanced collaborative coexistence hardware mechanisms and algorithms, which
ensure that WLAN and Bluetooth collaboration is optimized for maximum performance. In addition, coexistence support for external
radios (such as LTE cellular and GPS) is provided via an external interface. As a result, enhanced overall quality for simultaneous
voice, video, and data transmission on a handheld system is achieved.
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
IEEE 802.11x Key Features
■ IEEE 802.11ac compliant.
■ Support for TurboQAM® (MCS0–MCS8 86 Mbps and MCS0–
MCS9 96 Mbps) HT20, 20 MHz channel bandwidth.
■ Single-stream spatial multiplexing up to 433.3 Mbps data rate.
■ Supports 20, 40, and 80 MHz channels with optional SGI (256
■ Full IEEE 802.11a/b/g/n legacy compatibility with enhanced
■ Supports explicit IEEE 802.11ac transmit beamforming.
■ TX and RX low-density parity check (LDPC) support for
improved range and power efficiency.
■ On-chip power amplifiers and low-noise amplifiers for both
■ Support for optional front-end modules (FEM) with external PAs
■ Supports optional integrated T/R switch for 2.4 GHz band.
■ Supports RF front-end architecture with a single dual-band
antenna shared between Bluetooth and WLAN for lowest
■ Shared Bluetooth and WLAN receive signal path eliminates the
need for an external power splitter while maintaining excellent
sensitivity for both Bluetooth and WLAN.
■ Internal fractional-n PLL 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 LTE or GPS.
1. The PCIe interface is not brought up on CYW43455 and Cypress's firmware and drivers do not support this interface.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-15051 Rev. *O
• San Jose, CA 95134-1709 • 408-943-2600
Revised March 22, 2019