Overview

The BTM420/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. BT version 2.1 provides the advantage of Secure Simple Pairing that improves security and enhances ease of use for end customers.

Note: The BTM420-xx and BTM421-xx variants have reached end of production and are available on a limited basis only. Find the End of Life Announcement in the Documentation tab below.

Specifications

Antenna Options
Integrated antenna or External via Trace Pin
Bluetooth Version
v2.1 + EDR
Chipset
CSR BC04
Connector Type
SMT
Development Kit Contents
Development board
Dimension (Height - mm)
3.4 mm
Dimension (Length - mm)
22 mm
Dimension (Width - mm)
12.5 mm
Frequency
2.402 - 2.480 G
Logical Interfaces
SMT
Max Transmit Power
Class 2, +4 dBm (at antenna pad  BTM420), +4 dBm (from integrated antenna  BTM421)
Product Benefits
FCC/IC & CE - Limited Modular Approval<br/>Lead Free & ROHS Compliant
Range
Up to 30 meters
Receive Sensitivity
Better than -84 dBm
Weight
.105 oz (3 g)
Wi-Fi Coexistence
2 wire and 3 wire schemes supported
Wireless Specification
802.11 b/g
Antenna Options Bluetooth Version Chipset (Wireless) Compliance Connector Type Data Rate Development Kit Contents Dimension (Height - mm) Dimension (Length - mm) Dimension (Width - mm) Frequency Frequency Range (Max) Frequency Range (Min) Input Power Logical Interfaces Max Transmit Power Power Consumption Protocols Range Receive Sensitivity Software Weight Wi-Fi Coexistence Wireless Specification
BTM420 Trace Pin v2.1 + EDR CSR BC04 FCC / IC / CE SMT 2.1 MBps Development board 3.4 mm 18 mm 12.5 mm 2.4 GHz 2.480 GHz 2.402 GHz 3.1 – 3.3V HCI +4 dBm 32mA AT Command Set Up to 30 meters -84 dBm Terminal Software .105 oz (3 g) 2 wire and 3 wire schemes supported Bluetooth v2.1 + EDR
Antenna Options Bluetooth Version Chipset (Wireless) Compliance Connector Type Data Rate Development Kit Contents Dimension (Height - mm) Dimension (Length - mm) Dimension (Width - mm) Frequency Frequency Range (Max) Frequency Range (Min) Input Power Logical Interfaces Max Transmit Power Power Consumption Protocols Range Receive Sensitivity Software Weight Wi-Fi Coexistence Wireless Specification
BTM421 Integrated Antenna v2.1 + EDR CSR BC04 FCC / IC / CE SMT 2.1 MBps Development board 3.4 mm 24 mm 12.5 mm 2.4 GHz 2.480 GHz 2.402 GHz 3.1 – 3.3V HCI +4 dBm 32mA AT Command Set Up to 30 meters -84 dBm Terminal Software .105 oz (3 g) 2 wire and 3 wire schemes supported Bluetooth v2.1 + EDR
Antenna Options Bluetooth Version Chipset (Wireless) Connector Type Data Rate Frequency Frequency Range (Max) Frequency Range (Min) Logical Interfaces Max Transmit Power Protocols Range Receive Sensitivity Software Wi-Fi Coexistence Wireless Specification
DVK-BTM420 Integrated Antenna v2.1 + EDR CSR BC04 USB Pluggable 2.1 MBps 2.4 GHz 2.480 GHz 2.402 GHz USB +4 dBm AT Command Set Up to 30 meters -84 dBm Terminal Software 2 wire and 3 wire schemes supported Bluetooth v2.1 + EDR
Antenna Options Bluetooth Version Chipset (Wireless) Connector Type Data Rate Frequency Frequency Range (Max) Frequency Range (Min) Logical Interfaces Max Transmit Power Protocols Range Receive Sensitivity Software Wi-Fi Coexistence Wireless Specification
DVK-BTM421 Integrated Antenna v2.1 + EDR CSR BC04 USB Pluggable 2.1 MBps 2.4 GHz 2.480 GHz 2.402 GHz USB +4 dBm AT Command Set Up to 30 meters -84 dBm Terminal Software 2 wire and 3 wire schemes supported Bluetooth v2.1 + EDR

Documentation

Name Part Type Last Updated
Application Note - Bluetooth Latency and Data.pdf All Application Note 01-17-19
BTM400 Series DoC Sep2014.pdf All Certification 01-17-19
CE - EN 60950-1 LVD Grant (BTM4x1).pdf.pdf All Certification 01-17-19
CE - EN 62479 RF Exposure Test Report (BTM4x1).pdf All Certification 01-17-19
CE - EN 301 489-1-17 WLAN Test Report (BTM4x1).pdf All Certification 01-17-19
CE - EN 60950-1 LVD Test Report (BTM4x1).pdf All Certification 01-17-19
EU Declaration of Conformity - BTM4xx - 2017.pdf All Certification 01-17-19
EN 300 328 (2.4 GHz) BT EDR V1.9.1 - BTM4xx.pdf All Certification 01-17-19
EN 62311 - RF Exposure - BTM4xx.pdf All Certification 01-17-19
Radio Equipment Directive (RED) Updates - May 2017 All Certification 03-01-19
RoHSII - EU WEEE Compliance BT RAMP v1 8 All Certification 07-12-19
Mini Dev Kit Schematics - BTM42x.pdf All Documentation 01-17-19
Hardware Integration Guide - BTM42x Modules.pdf All Documentation 01-17-19
User Guide - BTM42x Module.pdf All Documentation 01-17-19
EOL - Bluetooth - Nov-15-2015.pdf All Documentation 01-17-19
Product Brief - BTM42X Modules.pdf All Documentation 01-17-19
Bluetooth Development Kit Terminal Download.zip All Software 01-17-19