Not Recommended for New Designs: This part is Not Recommended for New Designs (NRND). For newer designs, we recommend you use:
Device/Module image

BT121-A

Connectivity to Both Bluetooth BR/EDR and Smart Devices

BT121-A is a Bluetooth Smart Ready module targeted for applications that require both Bluetooth Smart and Classic connectivity. It can connect to legacy devices that only support Bluetooth SPP or Apple iAP2 profiles as well to devices that support Bluetooth Smart. BT121-A integrates a high-performance Bluetooth radio, a low-power ARM® Cortex® microcontroller and a Bluegiga Bluetooth Smart Ready stack software marking it extremely easy-to-use as no RF or Bluetooth software development are needed. BT121-A can be used as a modem together with a separate host MCU, but applications can also be embedded into the built-in ARM Cortex MCU with the Bluegiga BGScript™ scripting language.
 

Key Specs

 
TX Power (dBm)
+12 (BR/EDR) +8 (BLE)
RX Sensitivity (dBm)
-96
Typical Range
200-400 meter LoS range
Dimensions (mm)
11.0x13.9x2.2
TX Power (dBm)
+12 (BR/EDR) +8 (BLE)
RX Sensitivity (dBm)
-96
Typical Range
200-400 meter LoS range
Dimensions (mm)
11.0x13.9x2.2
Bluegiga Classic Legacy Modules Block Diagram

Quality Assurance, Environmental and Packaging Information

Silicon Labs targets a minimum of a 10-year lifecycle for all of its standard products and expects to produce the BT121-A until at least December 2025.

The longevity date shown above is for the preferred revision of this part number, for a complete list of part number revisions, use the search button below.

As part of its ongoing commitment to supply continuity, Silicon Labs may provide pin-compatible and functionally equivalent replacement products if Silicon Labs determines, at its discretion, that supply chain adjustments, product improvements, market conditions, or similar business or technical issues make this necessary or advisable.

If for business, technical or other reasons beyond Silicon Labs’ reasonable control, Silicon Labs finds that it is necessary to discontinue a product, our policy is to issue an EOL notice that provides 6 months from notice to place final orders and 12 months from notice for final shipments. This policy complies with the JEDEC standard EIA/JESD48 that is commonly used in the semiconductor industry. We provide the required support for a product for its full life cycle.

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