Sleepy Bee Common Specs
- Lowest MCU sleep current with supply brownout (50 nA)
- Lowest MCU active current (150 μA / MHz at 24.5 MHz)
- Lowest MCU wake on touch average current (< 1 μA)
- Lowest sleep current using internal RTC and supply brownout (< 300 nA)
- Ultra-fast wake up for digital and analog peripherals (< 2 μs)
- Integrated LDO to maintain ultra-low active current at all voltages
- Up to 14 capacitive sense channels
- 25 MHz core frequency
- Priority crossbar for flexible routing
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Part Number | MCU Core | MHz | Flash | RAM | Dig I/O Pins | 5 Volt Tolerant | ADC 1 | USB | Temp Sensor | Timers (16-bit) | PCA Channels | DAC | Comparators | UART | SPI | I2C | HS I2C Slave | I2S | EMIF | CAN | LIN | AES | AEC-Q100 | Vdd (min) | Vdd (max) | Package Type | Package Size (mm) | Internal Osc. | VREF | Debug Interface | Temperature Range (ºC) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
8051 | 25 | 2 | 0.25 | 16 | 12-bit, 9-ch. | 4 | 3 | — | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN20 | 3x3 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 4 | 0.5 | 16 | 12-bit, 9-ch. | 4 | 3 | — | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN20 | 3x3 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 8 | 0.5 | 16 | 12-bit, 9-ch. | 4 | 3 | — | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN20 | 3x3 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 8 | 0.5 | 17 | 12-bit, 9-ch. | 4 | 3 | — | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN24 | 4x4 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 8 | 0.5 | 13 | 12-bit, 9-ch. | 4 | 3 | — | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | CSP16 | 1.65x1.78 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 8 | 0.5 | 16 | 12-bit, 9-ch. | 4 | 3 | — | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN20 | 3x3 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 8 | 0.5 | 17 | 12-bit, 10-ch. | 4 | 3 | — | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN24 | 4x4 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 16 | 4 | 16 | 10-bit, 15-ch. | 4 | 6 | — | 2 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN24 | 4x4 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 32 | 4 | 16 | 10-bit, 15-ch. | 4 | 6 | — | 2 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN24 | 4x4 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 32 | 4 | 24 | 10-bit, 23-ch. | 4 | 6 | — | 2 | 1 | 2 | 1 | 0 | 0 | 1 | 0 | 0 | 1.8 | 3.6 | QFN32 | 5x5 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 32 | 4 | 24 | 10-bit, 23-ch. | 4 | 6 | — | 2 | 1 | 2 | 1 | 0 | 0 | 1 | 0 | 0 | 1.8 | 3.6 | QFP32 | 7x7 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 64 | 4 | 16 | 10-bit, 15-ch. | 4 | 6 | — | 2 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1.8 | 3.6 | QFN24 | 4x4 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 64 | 4 | 24 | 10-bit, 23-ch. | 4 | 6 | — | 2 | 1 | 2 | 1 | 0 | 0 | 1 | 0 | 0 | 1.8 | 3.6 | QFN32 | 5x5 | ±2 | C2 | -40 85 | |||||||
8051 | 25 | 64 | 4 | 24 | 10-bit, 23-ch. | 4 | 6 | — | 2 | 1 | 2 | 1 | 0 | 0 | 1 | 0 | 0 | 1.8 | 3.6 | QFP32 | 7x7 | ±2 | C2 | -40 85 |
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EFM8SB2 High Flash Capacity 8-bit MCU Starter Kit
The Silicon Labs high flash capacity EFM8SB2 Starter Kit is an excellent starting point to evaluate and develop very low power applications on the EFM8SB2 MCUs.
![](/content/dam/siliconlabs/images/products/microcontrollers/8-bit_mcus/efm8_sleepy_bee/efm8-sleepy-bee-starter-kit.jpg)
EFM8SB2 High Flash Capacity 8-bit MCU Starter Kit
The Silicon Labs high flash capacity EFM8SB2 Starter Kit is an excellent starting point to evaluate and develop very low power applications on the EFM8SB2 MCUs.