C8051F99x Ultra Low Power Touch Sense MCUs

The C8051F99x family of ultra low power capacitive sensing microcontroller (MCU) devices provide the lowest power and highest sensitivity touch sensing solution for capacitive buttons, sliders, wheels and capacitive proximity sensing. Architected from the popular C8051F9xx platform, the device combines the industry-leading low power technology of the C8051F9xx family with the fast and accurate capacitive sensing features of the C8051F7xx/8xx families to address fast-growing capacitive touch applications.

C8051F990, F991, F996, F997 touch sense MCUs feature sub micro amp (<1 μA) wake on touch average current consumption, 150 µA/MHz active mode and multiple sleep modes as low as 10 nA. With up to 14 capacitive sensing inputs and a patent-pending charge timing hardware capacitance to digital converter, the C8051F99x family achieves unparalleled touch sensitivity, speed and ultra-low power in packages as small as a 3 mm x 3 mm QFN20.

Sleep current as low as
50nA
Active current as low as
147uA/MHz

C8051F99x Common Specs

  • High-speed pipelined 8051-compatible microcontroller core (up to 25 MIPS)
  • Industry’s lowest active & sleep currents
  • 150 µA/MHz active mode
  • 10 nA sleep mode
  • 50 nA sleep mode with brown-out protection
  • 300 nA sleep mode with internal oscillator
  • 14 input charge timing capacitance to digital converter
  • 12-bit 75 ksps single-ended ADC
  • 6-bit current reference
  • Precision calibrated 24.5 MHz internal oscillator
  • SmaRTClock oscillator
  • 8 kB of on-chip Flash memory
  • 512 bytes of on-chip RAM
  • Implemented SMBus/I²C, UART and SPI serial interfaces
  • Four general-purpose 16-bit timers
  • Programmable Counter/Timer Array (PCA)
  • On-chip internal voltage reference
  • On-chip watchdog timer
  • On-chip power-on reset and supply monitor
  • On-chip voltage comparator
  • 17 general purpose I/O
  • In-system, full-speed, non-intrusive debug interface (on-chip)
Status
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Part Number MCU Core MHz Flash (kB) RAM (kB) Dig I/O Pins 5 Volt Tolerant ADC 1 USB Temp Sensor Timers (16-bit) PCA Channels ADC 2 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 Other
8051 25 8 0.5 16 12-bit, 9-ch., 75 ksps 4 3 1 1 1 1 0 0 0 0 0 1.8 3.6 QFN20 3x3 ±2 C2
8051 25 8 0.5 16 4 3 1 1 1 1 0 0 0 0 0 1.8 3.6 QFN20 3x3 ±2 C2
8051 25 8 0.5 17 12-bit, 10-ch., 75 ksps 4 3 1 1 1 1 0 0 0 0 0 1.8 3.6 QFN24 4x4 ±2 C2
8051 25 8 0.5 17 12-bit, 10-ch., 75 ksps 4 3 1 1 1 1 0 0 0 0 0 1.8 3.6 QSOP24 8.65x3.9 ±2 C2
8051 25 8 0.5 17 4 3 1 1 1 1 0 0 0 0 0 1.8 3.6 QFN24 4x4 ±2 C2
8051 25 8 0.5 17 4 3 1 1 1 1 0 0 0 0 0 1.8 3.6 QSOP24 8.65x3.9 ±2 C2

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