LM506 Bluetooth 4.0 Dual-Mode Smart Ready (BLE) USB Adapter

The LM506 Bluetooth 4.0 Dual-Mode Smart Ready (BLE) USB Adapter combines Classic Bluetooth 2.0, 2.1 and 3.0 EDR standards along with the Bluetooth Low Energy (BLE) SMART standard, enabling the adapter to communicate with both traditional Bluetooth Classic and Bluetooth Low-Energy (BLE) SMART-enabled devices.

The LM506 utilises a Broadcom IC and can be supplied with or without Widcomm Windows drivers, which support a wide-range of Bluetooth profiles such as: HFP, A2DP, OPP, FTP, DUN, PAN, SPP, HCRP, SYNC, BTLE etc. The adapter will plug-and-play with Windows' own Bluetooth Stack when used with Windows XP, VISTA, Windows 7 and Windows 8.

LM506 Bluetooth 4.0 Dual-Mode Smart Ready (BLE) USB Adapter Technical Overview

The LM506 is a ROM-based HCI adapter and as such requires a PC or external host running a compatible stack. LM Technologies has been able to reduce the overall footprint and package-size the LM506 Bluetooth 4.0 BLE USB adapter, achieving a small Form Factor of 19.5mm x 16.0mm x 8.1 mm. The Bluetooth 4.0 BLE USB Adapter will support a data rate of 3 Mbps in Bluetooth Classic EDR Mode and up to 250 Kbps in BLE Mode.

The Bluetooth 4.0 BLE USB adapter is a Class 1 adapter with a maximum distance of 110m in open space. The Bluetooth 4.0 BLE USB Adapter has an output of 6dbm, which exceeds the Class 1 requirements set forth in the Bluetooth SIG standards, which state that any device with an output above 4dBm is categorised as a Class 1 device.

Apple iBeacon Compliance

When paired with a compatible stack, such as BlueZ 5.X or StoneStreetOne's Bluetopia, the LM506 offers compliance with the Apple iBeacon standard.

As an official Apple iBeacon and MFi partner, LM can provide additional value and advice on integration of its products (and its client's products) with Apple iDevices and standards.

The Bluetooth 4.0 Dual-Mode Smart Ready (BLE) USB adapter is also offered as a Module with Tape and Reel Packaging and acts as a HCI Module. To accommodate this type of use LM has terminated the USB tracks as an SMT module. In module format, it offers a competitive price against any competition. As the device has components on both sides of the PCBA please ask LM for advice on how best to design in the Bluetooth 4.0 BLE USB adapter as an SMT Module.

Current certifications are FCC, R&TTE CE, SIG and EMC Certifications.


  1. Bluetooth 4.0 USB Adapter with Bluetooth Low Energy (BLE) support
  2. 110 m range in open space
  3. Small Size Nano Adapter : 19.47(L) x 16(W) x 8.1(H) mm
  4. Stereo audio supported. VoIP calls over Bluetooth also supported
  5. Supports up to 7 ACL link and 3 SCO links
  6. Downloadable Windows Driver, Widcomm Software support for Windows XP, VISTA, 7. BlueZ support on Linux
  7. Apple iBeacon Compliant


  1. Bluetooth 4.0 Dual-Mode support
  2. Ideal solution for adding wireless connectivity to your laptop or PC
  3. Wide Range of Bluetooth Classic and Bluetooth Low Energy Profiles available
  4. Small size
  5. Interoperable with Bluetooth 4.0 PDAs and Smartphones

Product Variants

Part NumberDescription
506-0508BT4.0 Class 1 USB Adapter Broadcom Nano + Widcomm Software Retail
506-0502BT4.0 Class 1 USB Adapter Broadcom Nano - Adapter Only

Product Specifications

LM506 Bluetooth 4.0 Dual-Mode Smart-Ready (BLE) USB Adapter
ManufacturerLM Technologies
ChipsetBroadcom BCM20702
Power ClassificationClass 1
Adapter TypeUSB Adapter
InterfaceUSB 2.0
Bluetooth SpecificationCore 4.0 backward compatible with BT3.0/BT2.1 and BT2.0 + EDR
Frequency2402 – 2480 MHz ISM Band
Modulation MethodGFSK for 1 Mbps, π/4-DQPSK for 2 Mbps, 8-DPSK for 3 Mbps
Spread SpectrumFHSS (Frequency Hopping Spread Spectrum)
Operating Temperature-30°C to +60°C
Storage Temperature-30°C to +105°C
Humidity5~90% non-condensing
Data Transfer Rates (Max)3 Mbps enhanced data rate, 250 Kbps Low Energy mode data rate
RangeMaximum 110 m in open space
Tx PowerClass 1 (+8 dBm)
Input VoltageDC 5V (via USB port)
Rx Sensitivity< -82 dBm at <0.1 % BER
LED IndicatorPower/Active (BLUE)
OS SupportWindows XP/VISTA/7/8, Linux (Bluez 4.98 and above)
Default FirmwareBroadcom HCI ROM Firmware
SoftwareDownloadable Widcomm v6.5.0.2000 for Windows VISTA/7, Widcomm v5.6.0.7200 for Windows XP
Size19.47(L) x 16(W) x 8.1(H) mm
Weight2.2 g
Bluetooth ProfileGAP,SPP,HSP, HFP, DUN, FTP, FAX, PAN, LAN, HID, SYNC, HCRP, A2DP, AVRCP, BIP, GOEP, SDAP, OPP, Bluetooth Low Energy, Bluetooth Proximity Profile
CertificationCE, FCC, RoHS

Related Products


CertificationLM506 Bluetooth SIG Certificate
LM506 FCC Certificate - Bluetooth 2.1+EDR
LM506 FCC Certificate - Bluetooth 4.0 BLE
LM506 CE R&TTE Certificate
LM506 BQB Certificate
DatasheetLM506 Datasheet
DriversWindows Driver for Windows XP
Windows Driver for Windows VISTA 64bit
Windows Driver for Windows VISTA 32bit
Windows Driver for Windows 7/8 64bit
Windows Driver for Windows 7/8 32bit
Widcomm Driver for Windows XP, VISTA, 7
Quick Start GuideLM506 Quick Start Guide
User ManualLM506 Widcomm User Manual for Win XP
LM506 Widcomm User Manual for Win VISTA/7