LM509 - Bluetooth 5.4 Dual Mode Class 1 USB Adapter | LM Technologies
Teilenummer: LM509 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $39 | $39,00 |
| 10 | $35.5 | $355,00 |
| 100 | $29.9 | $2.990,00 |
| 500 | $26.4 | $13.200,00 |
| 1.000 | $23.5 | $23.500,00 |
LM509 Übersicht
Background knowledge: Bluetooth dual mode adapters are external peripherals that aggregate a Bluetooth Classic radio (for legacy audio, HID, and SPP profiles) and a Bluetooth Low Energy radio (for modern IoT, beacon, and low-power sensor profiles) onto a single USB endpoint. They are classified as Class 1 when their transmit output power reaches up to +20 dBm and supports an indoor range of roughly 30 meters, which extends coverage well beyond the Class 2 limit (~10 m) used in most laptops. Bluetooth 5.4 itself is a core specification released by the Bluetooth SIG that adds PAwR (Periodic Advertising with Responses), LE-Game-Controller profile support, and encrypted advertisement data, in addition to the 2x throughput and 4x range improvements of Bluetooth 5.0.
Key specifications of the LM509 include its dual-mode Bluetooth 5.4 radio, Class 1 transmit power, USB Type-A plug-and-play interface, and OS coverage from Windows 10/11 to mainline Linux kernels. The adapter exposes dual radio paths (BR/EDR + LE) so a host can pair both legacy audio peripherals and modern BLE sensors simultaneously. Bluetooth 5.4 features supported include advertising extensions, periodic advertising with responses, and LE audio metadata.
The product is supplied as a finished, end-user-ready module, not a bare silicon IC. Its architecture centers on a Bluetooth 5.4 SoC paired with a Class 1 RF front-end, USB 2.0 device controller, and integrated PCB antenna or external RF chain depending on the SKU variant. The completed enclosure is tested by the manufacturer for EMC and RF conformance, which removes RF tuning work from the integrator. Typical use cases include adding wireless audio and HID connectivity to industrial PCs, providing BLE data uplink for IoT gateways, and acting as a development dongle during Bluetooth firmware bring-up.
For successful deployment, verify that the host OS supplies USB HID/Bluetooth enumeration support and that Class 1 radio emissions comply with the regional ETSI/FCC/IC radio regulations at the installation site. The USB bus supplies the device with 5 V at roughly 100 mA, so no external power is required.
Drop-in-Alternativen für LM509 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
LM026
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LM530
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LM509 Spezifikationen (herstellerveröffentlicht)
| Product Type | Bluetooth 5.4 Dual Mode Class 1 USB Adapter |
| Wireless Protocol | Bluetooth 2.x + 4.x + 5.x (BR/EDR + LE) |
| Bluetooth Version | 5.4 (dual mode) |
| Radio Class | Class 1 (extended range) |
| Host Interface | USB Type-A (plug and play) |
| USB Standard | USB 2.0 full-speed |
| Operating Systems | Windows 10, Windows 11, Linux |
| Backward Compatibility | Bluetooth 2.x and 4.x |
| Form Factor | Ultra-small USB dongle |
| Power Source | USB bus powered (5 V) |
| Antenna | Integrated (per USB dongle design) |
| Compliance / Certifications | FCC, IC, CE (per regional approvals) |
| RoHS-Status | Compliant |
LM509 Pin-Konfiguration
| Pin 1 | VBUS — USB +5 V supply from host |
| Pin 2 | D- — USB differential data minus (USB 2.0 full-speed) |
| Pin 3 | D+ — USB differential data plus (USB 2.0 full-speed) |
| Pin 4 | GND — USB ground return |
Typische Anwendungen
LM509 ist geeignet für 6 Anwendungs: Industrial PC Bluetooth Add-On, IoT Gateway BLE Uplink, Bluetooth Audio Receiver (PC/TV Side), Development Dongle for Bluetooth Firmware Bring-Up, Wireless HID Keyboard/Mouse Bridge, Embedded System Wireless Service Port.
Industrial PC Bluetooth Add-On
The LM509 plugs into any industrial PC with a free USB Type-A port to add Bluetooth 5.4 dual mode connectivity for diagnostics tablets, wireless barcode scanners, and BLE sensor telemetry. With Class 1 radio power it can reach PLC cabinets across a 30 m indoor line-of-sight, and dual mode means a single dongle handles both classic SPP barcode traffic and modern BLE beacons. The adapter draws about 100 mA from the USB 5 V rail, so no external power is required, keeping field retrofits to a single-cable change. Compared to internal mini-PCIe cards, the LM509 requires no chassis disassembly, which dramatically simplifies deployment on already-sealed industrial PCs.
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IoT Gateway BLE Uplink
The LM509 turns a generic Linux or Windows mini-PC into a Bluetooth Low Energy gateway that pulls advertising packets and GATT data from nearby sensors. Bluetooth 5.4 features such as periodic advertising with responses (PAwR) and encrypted advertisements are exposed to host software, enabling authenticated sensor rollouts. With USB bus power only and a sub-$40 BOM cost, it is a low-effort way to add BLE uplink to an existing edge gateway without redesigning the enclosure. Per the LM Technologies datasheet, the adapter enumerates as a standard Bluetooth class device under Linux BlueZ, so existing BLE middleware stacks work without modification.
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Bluetooth Audio Receiver (PC/TV Side)
The LM509 lets a desktop PC, laptop, or smart TV with a USB port stream audio to Bluetooth headphones or speakers over a BR/EDR A2DP link. Because dual mode covers both classic A2DP audio and modern LE Audio metadata, the same dongle works with legacy headphones and the latest LC3-enabled earbuds. Class 1 transmit power keeps dropouts minimal even when the user walks into an adjacent room, which is a common complaint with the Class 2 chips inside most laptops. Recommended pairing is with Windows 10/11 'Sound > Output device' or Linux PulseAudio/PipeWire sink configuration to route system audio to the dongle.
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Development Dongle for Bluetooth Firmware Bring-Up
The LM509 can be used as a host-side Bluetooth reference radio during embedded firmware bring-up and pre-compliance testing of an MCU's Bluetooth stack. Its Class 1 transmit power exceeds the typical +4 dBm output of an internal chip antenna, which lets engineers verify long-range behavior early in the design cycle. Combined with the LM Technologies datasheet's OS-agnostic driver model, the LM509 reduces bring-up friction because the same dongle image can be repointed across Windows and Linux hosts. Recommended pairing is with manufacturer-supplied Bluetooth HCI capture tools to snoop on link-layer exchanges.
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Wireless HID Keyboard/Mouse Bridge
The LM509 serves as a Bluetooth HID bridge for kiosks, digital signage players, and industrial tablets that need to interface with wireless keyboards, mice, and game controllers. Dual mode covers both BR/EDR HID Classic (used by most existing keyboards) and the new LE-Game-Controller profile added in Bluetooth 5.4. With Class 1 range, the dongle can be placed at the back of a vending machine or behind a TV while still maintaining a robust link to a handheld scanner or remote control. Recommended pairing is with kiosk software that auto-launches a remote-input service on enumeration.
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Embedded System Wireless Service Port
The LM509 provides a wireless service port for headless embedded Linux systems that expose only USB and need secure remote access over BLE or Bluetooth Classic. Engineers can pair a tablet as a Bluetooth console to read logs, push firmware updates, or run diagnostics without opening the enclosure. Bluetooth 5.4 encrypted advertisements protect against unauthorized pairing attempts, which addresses a common gap in legacy BR/EDR-only service ports. Per the LM Technologies product page, the adapter is sized for embedded system deployment, making it an unobtrusive addition to a back-panel USB-A header.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LM509 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LM026 | LM530 |
|---|---|---|---|
| Brand | LM Technologies | LM Technologies | LM Technologies |
| Package | USB Type-A dongle | USB Type-A dongle | USB Type-A dongle |
| Bluetooth Version | 5.4 dual mode | 5.0 dual mode | 5.4 dual mode |
| Radio Class | Class 1 | Class 1 | Class 1 |
| Host Interface | USB Type-A plug-and-play | USB Type-A plug-and-play | USB Type-A plug-and-play |
| Supported OS | Windows 10/11, Linux | Windows 7/8/10, Linux | Windows 10/11, Linux |
| Backward Compatibility | BT 2.x, 4.x, 5.x | BT 2.x, 4.x | BT 2.x, 4.x, 5.x |
| Form Factor | Ultra-small USB dongle | Ultra-small USB dongle | Ultra-small USB dongle |
Wichtigste Unterscheidungsmerkmale
- Bluetooth 5.4 dual mode with periodic advertising (PAwR) (vs. LM026)
- Class 1 radio power for extended range (vs. Internal laptop Bluetooth radios (typical Class 2))
- Driverless plug-and-play on Windows and Linux (vs. Bare module designs requiring custom drivers)
Designhinweise
Although the LM509 enumerates as a standard Bluetooth class device on Windows 10/11 and Linux, some virtualized or remotely-attached USB ports do not pass through Bluetooth enumeration reliably. If the dongle is to be used inside a virtual machine, enable the host's USB Bluetooth device passthrough in the hypervisor, or pair an external Bluetooth radio on the guest OS instead. Verify driverless enumeration before committing to a production deployment on kiosks or thin clients.
Because the LM509 is a finished dongle, there is no PCB layout work for the integrator other than ensuring the USB receptacle is USB 2.0 full-speed capable (D+ / D- paired to 90 ohm differential impedance). Place the USB receptacle near an EMI-leak-free chassis edge if the dongle is to be cabled off-board, and keep the cable under 3 m to stay within USB 2.0 signal-integrity limits.
Estimated: a USB 2.0 full-speed link at 12 Mbps requires 90 ohm differential impedance and a maximum cable length of about 5 m. When extending the LM509 beyond the standard USB-A plug, use a shielded cable with a continuous drain wire tied to chassis ground on one end only, to avoid ground loops in industrial installations.
Compliance-Informationen
Compliance values are typical for a finished Class 1 Bluetooth USB dongle; LM Technologies publishes FCC, IC, and CE radio approvals for the LM509 on its product page. Operating temperature range, formal MTBF, and ESD ratings are not listed in the public datasheet and are marked [DATA_NEEDED] in specs.