Bluetooth
®
HCI Data Module
BTM420/421
The BTM420 and BTM421 Bluetooth® modules are designed to meet the needs of
developers adding robust, short range Bluetooth data connectivity to their products and
using embedded Bluetooth stacks within these products. They are based on the market-
leading Cambridge Silicon Radio BC04 chipset, providing exceptionally low power
consumption with outstanding range. Supporting the latest Bluetooth Version 2.1
Specification with EDR (Enhanced Data Rate), HCI Data Modules increase data throughput
up to 2.1 Mbps. Bluetooth v2.1 provides the advantage of Secure Simple Pairing that
improves security and enhances ease of use for end customers.
With a footprint as small as 12.5 mm x 18.0 mm and best-of-class low-power operation,
these modules are ideal for applications where designers need both performance and
minimum size. For maximum flexibility in systems integration, the modules are designed to
support separate power supplies for I/O and the USB interface.
These modules present an HCI interface and are fully qualified as Bluetooth Controller
Subsystem products. This also allows designers to integrate their existing pre-approved
Bluetooth Host and Profile subsystem stacks to gain a Bluetooth END product approval for
their products.
A low-cost developer’s kit is available for prototyping, ensuring a fast route to market.
Features and Benefits
Application Areas
Bluetooth v2.1+EDR
Adaptive frequency hopping to cope
with interference from other wireless
devices
Secure Simple Pairing support
External or internal antenna options
HCI interface
Bluetooth controller subsystem product
qualified
Compact size
Class 2 output – 4dBm
Low power operation
USB interface
PCM for external codec
Wi-Fi co-existence hardware support
Embedded devices
Phone accessories
Security devices
Medical devices
Aftermarket automotive
applications
Bluetooth advertising
ePOS
USA: +1.800.492.2320
Europe: +44.1628.858.940
Asia: +852.2268.6567
wirelessinfo@lairdtech.com
www.lairdtech.com/wireless
Bluetooth
®
HCI Data Module
BTM420/421
CATEGORIES
Wireless Specification
FEATURE
Bluetooth®
Frequency
Max Transmit Power
IMPLEMENTATION
Version 2.1+EDR
2.402 – 2.480 GHz
Class 2
+4 dBm (at antenna pad – BTM420)
+4 dBm (from integrated antenna – BTM421)
Better than -84 dBm
Up to 30 meters
Up to 2.1 Mbps (over the air)
Qualified to USB v 1.1. Compliant with USB 2.0 Data signalling
requirements.
Less than 40 mA during SCO transmission
3.0 V to +3.3 V
3.1 V to 3.5 V
1.7 V to +3.3 V (independent of V
CC
)
2 wire and 3 wire schemes supported
Connection via SMT pad – BTM420
Multilayer ceramic – BTM421
12.5 mm x 18.0 mm x 3.4 mm (external antenna – BTM420)
12.5 mm x 22.0mm x 3.4 mm (integrated antenna – BTM421)
-30° C to +85° C
-40° C to +85° C
Lead-free and RoHS compliant
1 Year
Development board
Controller Subsystem Product
BTM420 – Limited Modular Approval
BTM421 – Full Modular Approval
Host Interface
Power Consumption
Supply Voltage
Receive Sensitivity
Range
Data Rates
USB
Current Consumption
Supply
USB
I/O
802.11 (Wi-Fi)
External Antenna
Internal Antenna
Dimensions
Operating Temperature
Storage Temperature
Lead Free
Warranty
Development Kit
Bluetooth
FCC/IC & CE
Coexistence / Compatibility
Connections
Physical
Environmental
Miscellaneous
Developmental Tools
Approvals
Ordering Information
BTM420
BTM421
DVK-BTM420
DVK-BTM421
Bluetooth HCI Data Module (external antenna)
Bluetooth HCI Data Module (with integrated antenna)
Development Kit (external antenna)
Development Kit (with integrated antenna)
The details contained within the document are subject to change. Download the product specification from
www.lairdtech.com/wireless
for the most current specification.
Revision History
Version
Date
16 Oct
1.0
2013
CONN-DS-BT730 v1.0
Any information furnished by Laird Technologies, Inc. and its agents is believed to be accurate and reliable. All specifications are
subject to change without notice. Responsibility for the use and application of Laird Technologies materials rests with the end user.
Laird Technologies makes no warranties as to the fitness, merchantability, suitability or non- infringement of any Laird Technologies
materials or products for any specific or general uses. Laird Technologies shall not be liable for incidental or consequential
damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies’ Terms and Conditions of sale in
effect from time to time, a copy of which will be furnished upon request. © Copyright 2013 Laird Technologies, Inc. All Rights
Reserved. Laird, Laird Technologies, the Laird Technologies Logo, and other marks are trademarks or registered trademarks of
Laird Technologies, Inc. or an affiliate company thereof. Other product or service names may be the property of third parties.
Nothing herein provides a license under any Laird Technologies or any third party intellectual property rights.
Changes
Initial
Approved By
J. Kaye
Talking
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