The LMX9820A is a Bluetooth Serial Port module produced by National Semiconductor Corporation, which has high integration, small size and complete functions.
The LMX9820A is a highly integrated Bluetooth® Serial Port Module based on National's CompactRISC™ 16‑bit processor and Digital Smart Radio technology. It supports Bluetooth version 1.1, offers a small 10.1 × 14.1 × 2.0 mm form factor, and includes full firmware with a complete Bluetooth stack, profiles, and command interface.
The manual details the module's functional block diagram, hardware features, firmware capabilities, digital smart radio specifications, physical dimensions, pad and pin descriptions, electrical specifications, power‑up sequence, and low‑power modes, providing designers with all necessary information for system integration.
| Bluetooth version | 1.1 qualified |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Physical dimensions | 10.1 mm × 14.1 mm × 2.0 mm |
| Maximum UART baud rate | 921.6 kbaud |
| Typical input sensitivity | -81 dBm |
The module is qualified for Bluetooth version 1.1.
It operates from –40 °C to +85 °C.
The module measures 10.1 mm × 14.1 mm × 2.0 mm.