Bluetooth® Low Energy Module
Model Name : HY0021
Features
- Ultra-small module with slot antenna built into shielded package
- Large area restrictions are not required. One of the smallest board-level occupied areas in the world.
- Easy for PCB design based on maximum patterning flexibility
- Various certifications have been obtained.
Product Profile
- Bluetooth v5.4
◦LE 2M - SoC: Nordic nRF52805
- CPU: Arm® Cortex®-M4, 64MHz
- Memory: 192KB Flash / 24KB RAM
- Integrated 32 MHz and 32.768 kHz crystal oscillators
- Integrated DC-DC circuit components
Applications
- Wearables
- Health Care
- Remote Control
- IoT
- Beacons
- Computer Peripherals
Specifications
| Bluetooth version | v5.4 |
|---|---|
| Built-in Bluetooth IC | Nordic nRF52805 |
| CPU | Arm Cortex-M4, 64MHz |
| Memory | 192KB Flash / 24KB RAM |
| TX power | +4dBm |
| RX sensitivity | -94dBm(1Mbps) |
| TX current(DC-DC) | 7.0mA(1Mbps, +4dBm) |
| RX current(DC-DC) | 4.6mA(1Mbps) |
| Multi-protocol | - |
| GPIO | 8 GPIO |
| Interfaces / Peripherals | SPI, I2C, UART, QDEC, 12-bit ADC |
| High frequency clock | Built-in 32MHz crystal |
| Low frequency clock | Built-in 32.768kHz crystal |
| LC components for DC-DC | Built-in |
| Operating temperature range | -40°C to +85°C |
| Operating voltage range | 1.7V to 3.6V |
| Dimension | 3.5 x 10.0 x 1.0mm |
| Package | 24-Pin LGA |
| Certification/Qualification | Japan (MIC) U.S.A. (FCC) Canada (ISED) (ETSI EN300 328 V2.2.2) Bluetooth |
Evaluation boards
Model Name : HY0023Evaluation boards of FDK HY0021 is available. The boards may be used to check characteristics of the module and for software development.
Documents
| Document Name | Ver. | Date | Download File |
|---|---|---|---|
| Product Brief | 1.3 | 2026/3/11 | HY0021_ProductBrief_en.pdf |
| Datasheet | 2.1 | 2026/3/11 | HY0021_Datasheet_en.pdf |
| Application Note | 1.0 | 2024/11/29 | HY0021_AppNote_en.pdf |
| HY0021 CAD File | 1.0 | 2025/1/8 | HY0021_CAD_Files.zip |
| EVB Manual | 1.0 | 2024/12/11 | HY0021_EVBmanual_en.pdf |
| Software Development Guide | 1.0 | 2024/12/12 | HY0023_Software_Development_Guide_en.pdf |
- The Bluetooth® word mark is registered trademarks owned by Bluetooth SIG, Inc.
- FDK Corporation designs, manufactures and sells these modules under license of Slot Antenna on Shielded Package technology patented by Toshiba Corporation.
- Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.