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Bluetooth Module


EFR32BG21 Bluetooth BLE 5.0 Module SKB381

The SKB381 is a highly integrated BLE 5.0 module, designed for high data rate, short-range wireless communication in the 2.4GHz ISM band.

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Chip EFR32BG21
Bluetooth Protocol BLE 5.0
Dimension 20.0×12.0×2.0 mm

The SKB381 is a highly integrated BLE 5.0 module, designed for high data rate, short-range wireless communication in the 2.4GHz ISM band. The module is based on EFR32BG21 radio transceiver IC, which integrates a 32 bit ARM Cortex-M33 76.8MHz CPU, 64kB Data RAM, 512kB Flash memory and analog and digital peripherals. The SKB381 provides a high cost-effective BLE solution for wireless transmission.

Product Features:

◆ Main Chip: SILICON LABS EFR32BG21A020F512IM32-B

◆ BLE® 5.0 protocol

◆ Supported BLE all data rates: 125kbps/500kbps/1Mbps/2Mbps

◆ Superior Radio Performance: TX Power 20dBm / RX sensitivity -104.9dBm@125kbps GFSK

◆ Ultra Low Power consumption: TX 9.3mA@0dBm,TX 33.8mA@10dBm, TX 60.8mA@20dBm;RX 8.8mA@1Mbps;Sleep current<5.0uA

◆ 2x16bit timers+1x32bit RTC timer+1*24bit Low Energy Timer for waveform generation

◆ 12-bit 1Msps SAR ADC

◆ Up to 16 general-purpose I/O pins with output state persistence and asynchronous interrupt capabilities

◆ Module interface for general serial port, full duplex two-way communication;

◆ HW encryption: AES 128/256, SHA-1, SHA-2, ECC(up to 256bit), ECDSA(up to 256bit),ECDH and J-Pake.

◆ ROHS compliance (Lead-free)

Wireless Features
Wireless Standards Bluetooth ® 5.0
Frequency Range 2.4G-2.4835GHz
Data Rates 125kbps,500kbps,1Mbps,2Mbps(Bluetooth ® 5.0)
Communication distance TBD
Broadcast distance TBD
Wireless Security AES HW Encryption
Transmit Power +0dBm to +20dBm
Work Mode Central/ Peripheral (Master/ Slave device in BLE connection)
Certification ROHS
Environment Operating Temperature: -40℃~85℃
Storage Temperature: -40℃~125℃
Operating Humidity: 10%~50% Non-condensing
Storage Humidity: 5%~90% Non-condensing

◆ BLE 5.0wireless microphone

◆ Computer peripherals and I/O devices

Mouse Keyboard

Multi-touch trackpad

◆  Interactive entertainment devices

Remote controller

3D Glasses

Gaming remote controller

◆  Personal Area Networks

Health/fitness sensor and monitor devices

Medical devices

Key-fobs + wrist watches

◆  Remote control toys

◆  Colourful LED Control

◆ Building automation

◆  Wireless sensor networks.

◆  Asset tracking.

1. who are we?
We are based in Guangdong, China, start from 2006,sell to North America(30.00%),Eastern Europe(15.00%),Western Europe(15.00%),Northern Europe(14.00%),Oceania(5.00%),South Asia(5.00%),Domestic Market(5.00%),South America(4.00%),Southeast Asia(3.00%),Africa(00.00%),Mid East(00.00%),Central America(00.00%),Southern Europe(00.00%).
2. how can we guarantee quality?
Always a pre-production sample before mass production; Always final Inspection before shipment;