About Bluetooth® Low Energy

Bluetooth Low Energy (LE) is designed for very low power operation and is optimized to short burst data transmission. In order to achieve reliable communication in the 2.4 GHz frequency band, it employs a robust frequency hopping spread spectrum method that transmits data over 40 channels.
The Bluetooth LE radio provides great flexibility to developers with data rates from 125Kb/s to 2 Mb/s, multiple PHY options that support power levels from 1mW to 100mW, and multiple high-level security options required by government agencies.
The Bluetooth LE supports multiple network topologies such as "Point-to-Point" used for data transfer, "Broadcast" used for location services, and "Mesh" used for building large-scale device networks.

Bluetooth Smart logo

Bluetooth Low Energy (LE)

Frequency Band 2.4GHz ISM Band (2.402 – 2.480 GHz Utilized)
Channels 40 channels with 2 MHz spacing
(3 advertising channels/37 data channels)
Channel Usage Frequency-Hopping Spread Spectrum (FHSS)
Modulation GFSK
Power Consumption ∼0.01x to 0.5x of reference
(depending on use case)
Data Rate LE 2M PHY: 2 Mb/s
LE 1M PHY: 1 Mb/s
LE Coded PHY (S=2): 500 Kb/s
LE Coded PHY (S=8): 125 Kb/s
Max Tx Power Class 1: 100 mW (+20 dBm)
Class 1.5: 10 mW (+10 dbm)
Class 2: 2.5 mW (+4 dBm)
Class 3: 1 mW (0 dBm)
Network Topologies Point-to-Point (including piconet)

The profits of the Bluetooth LE is that it can communicate with applications for smartphone or tablet. The Bluetooth LE is already used in many new applications such as healthcare & fitness, home electric appliances, home automation, gadgets, accessories and location systems. As the IoT market grows, it is expected that products support the Bluetooth LE will increase at an accelerated pace.

Renesas Electronics is an associate member of the Bluetooth SIG, Inc.

* The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc.

Bluetooth Wireless Standards

The Bluetooth wireless standards includes the LE standard and the BR/EDR standard that supports the Basic Rate and Enhanced Data Rate that are the classic standards.
Devices are classified into types that support LE only, BR/EDR only, and both LE and BR/EDR.
Renesas devices (RL78/G1D, RX23W, RA4W1) are the types that support only LE.


Bluetooth Marketing Classifications


Applications using Bluetooth LE technology have spread from healthcare devices and continue to expand into a wide variety of fields such as sports and fitness, smart homes, industrial equipment, and beacon applications.


Recommended Products
Block Semiconductor Device Recommended Product Name Features, etc.
Main Control MCU RL78/G1D Group Built-in 2.4 GHz Bluetooth Low Energy
RX23W Group Built-in 2.4 GHz Bluetooth Low Energy, Long range
RA4W1 Group Built-in 2.4 GHz Bluetooth Low Energy, Long range