FSC-BT691 Bluetooth 5.1 Low Energy Small Size SoC BLE Module
FSC-BT691 is a Bluetooth Low Energy (BLE) 5.1 ultra-low-power and small-size SoC Module featuring a 2.4 GHz transceiver and an ARM Cortex-M0+ microcontroller. Its low active RF and MCU current consumption, along with low-power mode operation, ensure extended battery life suitable for small coin cell and energy-harvesting applications. The module comes with easy-to-use firmware; developers can use simple UART AT commands to integrate Bluetooth functions. It is designed for a wide range of applications, including disposables, wireless sensor nodes, beacons, proximity tags, trackers, trackpads, toys, and medical and industrial applications.
Features
- Dialog DA14531 BLE5.1 MCU to execute Bluetooth BLE protocol stack. 16MHz 32-bit ARM® Cortex-M0+.
- Certified with: FCC, CE, TELEC, KC, IC, SRRC
Ultra Low Power Consumption
- TX: 3.5 mA, RX: 2.2 mA (peak currents with DC-DC, VBAT_HIGH = 3V and 0 dBm)
- Sleep mode: 1.6uA
- Clock-less hibernation mode: 270 nA
RF Specifications
- Bluetooth 5.1 Low Energy (BLE) Transceiver
- Programmable transmit output power from -19.5 dBm to +2.5 dBm
- -94 dBm receiver sensitivity
- Support BLE central and peripheral
- Supports up to three BLE connections
General
- 10mm × 11.9mm small-size stamp 20-pin package
- On-board antenna, support installing an external Feasycom antenna or other antenna.
- Typical cold boot to radio active 35 ms
- Wide Operating Voltage Range: 1.65V ~ 3.6V
- Support the OTA upgrade
- Bluetooth stack profiles: ATT, GATT, and other BLE protocols
- UART, I2C, SPI, ADC interfaces
- Built-in temperature sensor for die temperature monitoring
Specifications
| Chip | Dialog DA14531 |
| Bluetooth Standard | Bluetooth v5.1 Low Energy |
| Transmit Power | Programable range: -19.5 ~ +2.5 dBm |
| Receive Sensitivity | -94 dBm (Min.) |
| Profiles | BLE: ATT, GATT |
| Certifications | FCC, CE, TELEC, KC, IC, SRRC |
| GPIO Count | 6 |
| Interfaces | UART, I2C, SPI, ADC, PWM |
| Antenna | On-board antenna by default
Support installing an external Feasycom antenna or another antenna |
| Dimensions (mm) | 10 × 11.9 × 2.2; Pad Pitch 0.8 |
| Operating Temperature | -40°C ~ +85°C |
| Storage Temperature | -40°C ~ +85°C |
| Supply Voltage | VDD: 1.65V ~ 3.6V |








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