Data Sheet

BT852
Datasheet
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
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BLOCK DIAGRAM AND DESCRIPTIONS
Figure 1: BT852 USB Dongle Block Diagram
Table 1: Block diagram descriptions
CYW20704A2
(Main chip)
The BT852 is based on CYW20704A2 dual mode chip. The chip is a single-chip radio with on-
chip LDO regulators and baseband IC for Bluetooth 2.4 GHz systems including EDR to 3 Mbps.
Dedicated signal and baseband processing is included for full Bluetooth operation.
Antenna
A PCB printed antenna used for cost effectivity.
Band Pass
Filter
The band pass filter filters the out-of-band emissions from the transmitter to meet the
specific regulations for type approvals of various countries.
EEPROM
There are 512 k bits EEPROM embedded in the dongle which can be used to store
parameters, such as BD_ADDR, USB enumeration information, maximum TX power, USB
product ID, USB vendor ID, and USB product description.
Crystal
The embedded 40 MHz crystal is used for generating the clock for the dongle.