Specification	EFM32WG940F64-QFN64

Connectivity	UART/USART, USB, I2C, IrDA, SmartCard, SPI
Core Processor	ARM® Cortex®-M4F
Core Size	32-Bit Single-Core
Data Converters [custom]	8, 2
Data Converters [custom]	12b, 12b
Mounting Type	Surface Mount
Number of I/O	52
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Oscillator Type	Internal
Package / Case	64-VFQFN Exposed Pad
Peripherals	WDT, I2S, Brown-out Detect/Reset, POR, PWM, LCD, DMA
Program Memory Size	64 KB
Program Memory Type	FLASH
Speed	48 MHz
Supplier Device Package	64-QFN (9x9)
Voltage - Supply (Vcc/Vdd) [Max]	3.8 V
Voltage - Supply (Vcc/Vdd) [Min]	1.98 V

EFM32WG940 Series

Part	Operating Temperature [Max]	Operating Temperature [Min]	Core Size	Speed	Program Memory Type	Oscillator Type	Peripherals	Number of I/O	Core Processor	Supplier Device Package	Package / Case	Connectivity	Program Memory Size	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Data Converters	Mounting Type	Data Converters [custom]	Data Converters [custom]
Silicon Labs EFM32WG940F128-B-QFN64	85 °C	-40 °C	32-Bit Single-Core	48 MHz	FLASH	Internal	Brown-out Detect/Reset DMA I2S LCD POR PWM WDT	53	ARM® Cortex®-M4F	64-QFN (9x9)	64-VFQFN Exposed Pad	I2C IrDA SmartCard SPI UART/USART USB	128 KB	1.98 V	3.8 V	2 8 12 b 12 b	Surface Mount
Silicon Labs EFM32WG940F64-QFN64	85 °C	-40 °C	32-Bit Single-Core	48 MHz	FLASH	Internal	Brown-out Detect/Reset DMA I2S LCD POR PWM WDT	52	ARM® Cortex®-M4F	64-QFN (9x9)	64-VFQFN Exposed Pad	I2C IrDA SmartCard SPI UART/USART USB	64 KB	1.98 V	3.8 V		Surface Mount	2 8	12b 12b
Silicon Labs EFM32WG940F256-B-QFN64R	85 °C	-40 °C	32-Bit Single-Core	48 MHz	FLASH	Internal	Brown-out Detect/Reset DMA I2S LCD POR PWM WDT	53	ARM® Cortex®-M4F	64-QFN (9x9)	64-VFQFN Exposed Pad	I2C IrDA SmartCard SPI UART/USART USB	256 KB	1.98 V	3.8 V	2 8 12 b 12 b	Surface Mount
Silicon Labs EFM32WG940F256-QFN64T	85 °C	-40 °C	32-Bit Single-Core	48 MHz	FLASH	Internal	Brown-out Detect/Reset DMA I2S LCD POR PWM WDT	52	ARM® Cortex®-M4F	64-QFN (9x9)	64-VFQFN Exposed Pad	I2C IrDA SmartCard SPI UART/USART USB	256 KB	1.98 V	3.8 V		Surface Mount	2 8	12b 12b

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

General part information

ARM® Cortex®-M4F Wonder Gecko Microcontroller IC 32-Bit Single-Core 48MHz 64KB (64K x 8) FLASH 64-QFN (9x9)