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C8051F392-A-GMR

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SKYWORKS SILICON LABS Microcontrollers (MCU/MPU/SOC), QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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C8051F392-A-GMR

SKYWORKS SILICON LABS · Microcontrollers (MCU/MPU/SOC) · QFN-20-EP(4x4)

C8051F392-A-GMR from SKYWORKS SILICON LABS, in a QFN-20-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 P0.0/VREF bidirectional Port 0.0 digital I/O or analog input; also the external VREF input when the external voltage reference is used.
2 GND power_in Ground; this ground connection is required, and the center pad may optionally be connected to ground also.
3 VDD power_in Power supply voltage; the device is specified for 1.8 to 3.6 V operation.
4 RST/C2CK bidirectional Device reset as an open-drain output of the internal POR or VDD monitor, where an external source can start a system reset by driving it low for at least 10 μs; this pin also carries the C2CK clock for the C2 debug interface.
5 C2D/P2.0 bidirectional Bi-directional data signal for the C2 debug interface, shared with Port 2.0 on 20-pin packaging.
6 P1.7 bidirectional Port 1.7 digital I/O or analog input.
7 P1.6 bidirectional Port 1.6 digital I/O or analog input.
8 P1.5 bidirectional Port 1.5 digital I/O or analog input.
9 P1.4 bidirectional Port 1.4 digital I/O or analog input.
10 P1.3 bidirectional Port 1.3 digital I/O or analog input.
11 P1.2 bidirectional Port 1.2 digital I/O or analog input.
12 P1.1 bidirectional Port 1.1 digital I/O or analog input.
13 P1.0/IDA1 bidirectional Port 1.0 digital I/O or analog input; on 20-pin devices this pin is also the IDA1 current DAC output.
14 P0.7 bidirectional Port 0.7 digital I/O or analog input.
15 P0.6/CNVSTR bidirectional Port 0.6 digital I/O or analog input; also the ADC0 external convert start or IDA0 update source input CNVSTR.
16 P0.5 bidirectional Port 0.5 digital I/O or analog input; always assigned to UART0 RX by the crossbar.
17 P0.4 bidirectional Port 0.4 digital I/O or analog input; always assigned to UART0 TX by the crossbar.
18 P0.3/XTAL2 bidirectional Port 0.3 digital I/O or analog input; also the XTAL2 external oscillator output for a crystal or resonator, or the clock input for CMOS, capacitor, or RC configurations.
19 P0.2/XTAL1 bidirectional Port 0.2 digital I/O or analog input; also the XTAL1 external clock input and oscillator return for a crystal or resonator.
20 P0.1/IDA0 bidirectional Port 0.1 digital I/O or analog input; also the IDA0 current DAC output.
21 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer SKYWORKS SILICON LABS
Package QFN-20-EP(4x4)
Category Embedded Processors & Controllers
Pins 21

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Ambient Temperature under Bias -55 125 °C 32
Storage Temperature -65 150 °C 32
Voltage on any Port I/O Pin or RST with respect to GND -0.3 V 32
Voltage on VDD with Respect to GND VDD -0.3 4.2 V 32
Maximum Total Current through VDD or GND 100 mA 32
Maximum Output Current Sunk by RST or any Port Pin 100 mA 32
Supply Voltage (VDD) VDD 3 3.6 V Normal Operation 33
Supply Voltage (VDD) for writing or erasing Flash VDD 1.8 3 3.6 V Writing or Erasing Flash Memory 33
SYSCLK (System Clock) SYSCLK 0 50 MHz 33
SYSCLK High Time TSYSH 9.5 ns 33
SYSCLK Low Time TSYSL 9.5 ns 33
Specified Operating Temperature Range (C8051F39x) -40 105 °C C8051F39x 33
Digital Supply Current, CPU Active (Normal Mode) IDD 7.1 7.8 mA VDD = 3.6 V, F = 50 MHz 33
Digital Supply Current, CPU Active (Normal Mode) IDD 7 7.7 mA VDD = 3.0 V, F = 50 MHz 33
Digital Supply Current, CPU Active (Normal Mode) IDD 4.6 5.2 mA VDD = 3.6 V, F = 25 MHz 33
Digital Supply Current, CPU Active (Normal Mode) IDD 4.5 5.1 mA VDD = 3.0 V, F = 25 MHz 33
Output Low Voltage 0.6 V IOL = 8.5 mA 35
Output Low Voltage 0.1 V IOL = 10 μA 35
Input Low Voltage 0.5 V 1.8 V ≤ VDD < 2.7 V 35
Input Low Voltage 0.6 V 2.7 V ≤ VDD ≤ 3.6 V 35
Input Leakage Current -1 1 μA Weak Pullup Off 35
RST Output Low Voltage 0.6 V IOL = 4 mA, VDD = 1.8 to 3.6 V 36
RST Input Low Voltage 0.6 V 36
RST Input Pullup Current 20 100 μA RST = 0.0 V 36
VDD POR Threshold (VRST_LOW) VRST_LOW 1.7 1.75 1.8 V 36
VDD POR Threshold (VRST_HIGH) VRST_HIGH 2.4 2.55 2.7 V 36
Missing Clock Detector Timeout 80 580 800 μs Time from last system clock rising edge to reset initiation 36
Minimum RST Low Time to Generate a System Reset 15 μs 36
VDD Monitor Supply Current 20 50 μA 36
Flash Endurance 20000 100000 Erase/Write 37
Flash Erase Cycle Time 23 25 27 ms 37
Flash Write Cycle Time 58 61 64 μs 37
Oscillator Frequency, internal high-frequency oscillator (C8051F390/1/2/3) 48 49 50 MHz 38
Oscillator Frequency, internal low-frequency oscillator (C8051F390/1/2/3) 75 80 85 kHz 38
Oscillator Frequency, internal low-power oscillator (C8051F390/1/2/3) 18.5 20 21.5 MHz 38
ADC0 Differential Nonlinearity -1 1 LSB 39
ADC0 Offset Error -2 0 2 LSB 39
ADC0 Full Scale Error -5 -2 1 LSB 39
ADC0 Signal-to-Noise Plus Distortion 55 58 dB 10 kHz sine-wave single-ended input, 1 dB below Full Scale, 500 ksps 39
ADC0 Throughput Rate 500 ksps 39
ADC0 Input Voltage Range, Single Ended (AIN+, GND) 0 V Single Ended (AIN+, GND) 39
ADC0 Absolute Pin Voltage with respect to GND 0 V Single Ended or Differential 39
ADC0 Power Supply Current (VDD supplied to ADC0) 860 1010 μA Operating Mode, 500 ksps 39
Precision Temperature Sensor Range -40 105 °C 40
Precision Temperature Sensor Absolute Error -2 0.2 2 °C 40
Precision Temperature Sensor Supply Current 230 280 μA 40
Precision Temperature Sensor Clock Frequency (FTS0) FTS0 320 520 730 kHz 40
Voltage Reference Output Voltage (2.4 V Setting) 2.37 2.4 2.43 V 2.4 V Setting (REFBE = 1) 41
Voltage Reference Output Voltage (1.2 V Setting) 1.18 1.2 1.22 V 1.2 V Setting (REFBE = 1) 41
VREF Short-Circuit Current 9 mA REFBE = 1 41
External VREF Input Voltage Range 1 V External Reference (REFBE = 0) 41
Voltage Reference Supply Current 70 100 μA REFBE = "1" or TEMPE = "1" 41
Voltage Regulator Output Voltage 1.73 1.78 1.83 V 41
IDAC Integral Nonlinearity -3 3 LSB 42
IDAC Full Scale Error, 2 mA Full Scale Output Current -122 0 40 μA 2 mA Full Scale Output Current 42
IDAC Full Scale Error, 1 mA Full Scale Output Current -61 0 20 μA 1 mA Full Scale Output Current 42
IDAC Full Scale Error, 0.5 mA Full Scale Output Current -31 0 10 μA 0.5 mA Full Scale Output Current 42
Comparator0 Common-Mode Rejection Ratio 0.6 5 mV/V 43
Comparator0 Supply Current at DC Mode 0 32 50 μA DC Mode 0 44
Comparator0 Supply Current at DC Mode 3 2 8 μA DC Mode 3 44

CAD (KiCad official)

  • Symbol: C8051F392-A-GMR
  • Footprint: Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
  • 3D model: QFN-20-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: c8051f392-a-gmr-etched.step / c8051f392-a-gmr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); c8051f392-a-gmr.step / c8051f392-a-gmr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: SKYWORKS SILICON LABS datasheet (303 pp, sha256 4d666090a43badcf, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF