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4 mm Embedded Processors & Controllers

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (SGD) Filter the results in the table by unit price based on your quantity.	Qty.	Product Type	Mounting Style	Package/Case	Core	Data Bus Width	Maximum Clock Frequency	Program Memory Size	Data RAM Size	ADC Resolution	Number of I/Os	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO EFR32MG21B020F1024IM32-B Silicon Labs 1: $8.19 2,302In Stock	Mfr. Part No. EFR32MG21B020F1024IM32-B Mouser Part No 634-32MG21B20024M32B	Silicon Labs	RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32mg21 socs	Datasheet	2,302In Stock	$8.19 $6.26 $5.62 $5.25 View $5.05 $5.03	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	80 MHz	1 MB	96 kB		20 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 768kB, 64kB(RAM), 20 GPIO EFR32MG21B020F768IM32-B Silicon Labs 1: $8.21 1,958In Stock	Mfr. Part No. EFR32MG21B020F768IM32-B Mouser Part No 634-32MG21B20768M32B	Silicon Labs	RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 768kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32mg21 socs	Datasheet	1,958In Stock	$8.21 $6.30 $5.82 $5.29 View $5.05 $4.90 $4.83 $4.76	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	80 MHz	768 kB	64 kB		20 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 768kB, 64kB(RAM), 20 GPIO EFR32BG21A010F768IM32-BR Silicon Labs 1: $6.69 2,484In Stock	Mfr. Part No. EFR32BG21A010F768IM32-BR Mouser Part No 634-BG21A010F76832BR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 768kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	2,484In Stock	Cut Tape $6.69 $5.10 $4.71 $4.26 View Reel $3.82 $4.05 $3.93 $3.88 $3.82	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	40 MHz	768 kB	64 kB		20 I/O	- 40 C	+ 125 C	Reel, Cut Tape
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO EFR32BG21B010F512IM32-BR Silicon Labs 1: $6.68 2,370In Stock	Mfr. Part No. EFR32BG21B010F512IM32-BR Mouser Part No 634-32BG21B1012M32BR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	2,370In Stock	Cut Tape $6.68 $5.09 $4.69 $4.24 View Reel $3.82 $4.04 $3.92 $3.86 $3.82	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	80 MHz	512 kB	64 kB	12 bit	20 I/O	- 40 C	+ 125 C	Reel, Cut Tape
RF System on a Chip - SoC Bluetooth BLE IC, 4x4mm, Industrial Temp IS1871SF-202 Microchip Technology 1: $2.95 4,325In Stock	Mfr. Part No. IS1871SF-202 Mouser Part No 579-IS1871SF-202	Microchip Technology	RF System on a Chip - SoC Bluetooth BLE IC, 4x4mm, Industrial Temp Learn More about Microchip Technology microchip is1870 is1871 socs	Datasheet	4,325In Stock	Cut Tape $2.95 $2.88 $2.71 $2.68 Reel $2.43	Min.: 1 Mult.: 1 : 5,000	RF System on a Chip - SoC	SMD/SMT	QFN-32	8051	8 bit	32 MHz	256 kB	24 kB	12 bit	15 I/O	- 40 C	+ 85 C	Reel, Cut Tape
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO EFR32MG21A010F1024IM32-B Silicon Labs 1: $7.41 320In Stock	Mfr. Part No. EFR32MG21A010F1024IM32-B Mouser Part No 634-MG21A010F102432B	Silicon Labs	RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32mg21 socs	Datasheet	320In Stock	$7.41 $5.75 $5.24 $4.81 View $4.49 $4.42 $4.30	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	40 MHz	1 MB	96 kB		20 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO EFR32BG22E224F512IM32-C Silicon Labs 1: $4.45 2,036In Stock	Mfr. Part No. EFR32BG22E224F512IM32-C Mouser Part No 634-2BG22E224F51232C	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32bg22e socs	Datasheet	2,036In Stock	$4.45 $3.40 $3.13 $2.79 View $2.58 $2.53 $2.39 $2.30 $2.27	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	76.8 MHz	512 kB	32 kB	12 bit, 16 bit	18 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Flex Gecko, QFN32, 2.4G, 6dB, Proprietary, 512kB, 32kB(RAM), 18 GPIO EFR32FG22E121F512IM32-C Silicon Labs 1: $5.30 2,448In Stock	Mfr. Part No. EFR32FG22E121F512IM32-C Mouser Part No 634-2FG22E121F51232C	Silicon Labs	RF System on a Chip - SoC Flex Gecko, QFN32, 2.4G, 6dB, Proprietary, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32fg22e socs	Datasheet	2,448In Stock	$5.30 $3.94 $3.60 $3.24 View $3.06 $2.99 $2.84 $2.76 $2.71	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	38.4 MHz	512 kB	32 kB	12 bit, 16 bit	18 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 6dB, Mesh, 512kB, 32kB(RAM), 18 GPIO EFR32MG22E224F512IM32-C Silicon Labs 1: $6.38 1,847In Stock	Mfr. Part No. EFR32MG22E224F512IM32-C Mouser Part No 634-2MG22E224F51232C	Silicon Labs	RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 6dB, Mesh, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32mg22e socs	Datasheet	1,847In Stock	$6.38 $4.81 $4.42 $3.98 View $3.79 $3.77 $3.54 $3.43	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	76.8 MHz	512 kB	32 kB	12 bit, 16 bit	18 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO EFR32BG22C224F512GM32-CR Silicon Labs 1: $4.56 14,624In Stock	Mfr. Part No. EFR32BG22C224F512GM32-CR Mouser Part No 634-ER32BG22512GM3CR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32bg22	Datasheet	14,624In Stock	Cut Tape $4.56 $3.40 $3.10 $2.79 Reel $2.37 View $2.64 $2.57 $2.45 $2.33	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	76.8 MHz	512 kB	32 kB	12 bit	18 I/O	- 40 C	+ 85 C	Reel, Cut Tape
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO EFR32MG21A010F1024IM32-BR Silicon Labs 1: $7.56 27,923In Stock	Mfr. Part No. EFR32MG21A010F1024IM32-BR Mouser Part No 634-M21A010F102432BR	Silicon Labs	RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32mg21 socs	Datasheet	27,923In Stock	Cut Tape $7.56 $6.17 $5.73 $5.17 View Reel $4.26 $4.87 $4.73 $4.47 $4.26	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	40 MHz	1 MB	96 kB		20 I/O	- 40 C	+ 125 C	Reel, Cut Tape
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 20dB, Bluetooth 5.1, 1024kB, 96kB(RAM), 20 GPIO EFR32BG21B020F1024IM32-BR Silicon Labs 1: $10.77 887In Stock	Mfr. Part No. EFR32BG21B020F1024IM32-BR Mouser Part No 634-2BG21B20024M32BR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 20dB, Bluetooth 5.1, 1024kB, 96kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	887In Stock	Cut Tape $10.77 $8.30 $7.68 $7.00 View Reel $5.98 $6.49 $6.28 $5.98	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	80 MHz	1 MB	96 kB	12 bit	20 I/O	- 40 C	+ 125 C	Reel, Cut Tape
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO EFR32BG22C224F512IM32-CR Silicon Labs 1: $4.18 2,219In Stock	Mfr. Part No. EFR32BG22C224F512IM32-CR Mouser Part No 634-ER32BG22512IM3CR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32bg22	Datasheet	2,219In Stock	Cut Tape $4.18 $3.11 $2.84 $2.71 Reel $2.69 $2.09	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	76.8 MHz	512 kB	32 kB	12 bit	18 I/O	- 40 C	+ 125 C	Reel, Cut Tape
RF System on a Chip - SoC SMD IC ESP8685H4, single-core MCU, 2.4G Wi-Fi & BLE 5.0 combo, QFN 28-pin, 4*4mm, 4 MB flash inside, -40C - +105C ESP8685H4 Espressif Systems 1: $3.86 1,168In Stock 5,000Expected 2/11/2026	Mfr. Part No. ESP8685H4 Mouser Part No 356-ESP8685H4	Espressif Systems	RF System on a Chip - SoC SMD IC ESP8685H4, single-core MCU, 2.4G Wi-Fi & BLE 5.0 combo, QFN 28-pin, 4*4mm, 4 MB flash inside, -40C - +105C	Datasheet	1,168In Stock 5,000Expected 2/11/2026	$3.86 $3.33 $3.16 $2.90 View $2.75 $2.64 $2.53 $2.48 $2.04	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-28	RISC-V	32 bit	160 MHz	384 kB, 4 MB	400 kB	12 bit	15 GPIO	- 40 C	+ 105 C
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 768kB, 64kB(RAM), 20 GPIO EFR32BG21B010F768IM32-B Silicon Labs 1: $7.64 980In Stock	Mfr. Part No. EFR32BG21B010F768IM32-B Mouser Part No 634-32BG21B10768M32B	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 768kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	980In Stock	$7.64 $5.82 $5.37 $4.87 View $4.62 $4.47 $4.42 $4.38	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	80 MHz	768 kB	64 kB	12 bit	20 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 768kB, 64kB(RAM), 20 GPIO EFR32MG21B010F768IM32-B Silicon Labs 1: $7.58 486In Stock	Mfr. Part No. EFR32MG21B010F768IM32-B Mouser Part No 634-32MG21B10768M32B	Silicon Labs	RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 768kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32mg21 socs	Datasheet	486In Stock	$7.58 $5.77 $5.32 $4.81 View $4.58 $4.45 $4.38 $4.34	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	80 MHz	768 kB	64 kB		20 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 20dB, Bluetooth 5.1, 1024kB, 96kB(RAM), 20 GPIO EFR32BG21A020F1024IM32-BR Silicon Labs 1: $10.47 241In Stock	Mfr. Part No. EFR32BG21A020F1024IM32-BR Mouser Part No 634-B21A020F102432BR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 20dB, Bluetooth 5.1, 1024kB, 96kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	241In Stock	Cut Tape $10.47 $8.58 $7.93 $7.22 View Reel $6.01 $6.88 $6.66 $6.60 $6.01 Quote	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	40 MHz	1 MB	96 kB		20 I/O	- 40 C	+ 125 C	Reel, Cut Tape
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO EFR32BG21A010F512IM32-BR Silicon Labs 1: $6.00 134In Stock	Mfr. Part No. EFR32BG21A010F512IM32-BR Mouser Part No 634-BG21A010F51232BR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	134In Stock	Cut Tape $6.00 $4.53 $4.15 $3.75 View Reel $3.24 $3.55 $3.54 $3.32 $3.24	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	40 MHz	512 kB	64 kB	12 bit	20 I/O	- 40 C	+ 125 C	Reel, Cut Tape
RF System on a Chip - SoC Blue Gecko, TQFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO EFR32BG22C224F512GN32-C Silicon Labs 1: $4.72 100In Stock	Mfr. Part No. EFR32BG22C224F512GN32-C Mouser Part No 634-ER32BG22512GN32C	Silicon Labs	RF System on a Chip - SoC Blue Gecko, TQFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32bg22	Datasheet	100In Stock	$4.72 $3.58 $3.26 $2.94 View $2.77 $2.71 $2.57 $2.50 $2.43	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	TQFN-32	ARM Cortex M33	32 bit	76.8 MHz	512 kB	32 kB	12 bit	18 I/O	- 40 C	+ 85 C	Tray
RF System on a Chip - SoC Blue Gecko, TQFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO EFR32BG22C224F512GN32-CR Silicon Labs 1: $4.79 581In Stock	Mfr. Part No. EFR32BG22C224F512GN32-CR Mouser Part No 634-ER32BG22512GN3CR	Silicon Labs	RF System on a Chip - SoC Blue Gecko, TQFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32bg22	Datasheet	581In Stock	Cut Tape $4.79 $3.56 $3.26 $2.92 Reel $2.49 View $2.76 $2.69 $2.56 $2.43	Min.: 1 Mult.: 1 : 2,500	RF System on a Chip - SoC	SMD/SMT	TQFN-32	ARM Cortex M33	32 bit	76.8 MHz	512 kB	32 kB	12 bit	18 I/O	- 40 C	+ 85 C	Reel, Cut Tape
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO EFR32BG22C224F512IM32-C Silicon Labs 1: $4.56 232In Stock	Mfr. Part No. EFR32BG22C224F512IM32-C Mouser Part No 634-ER32BG22512IM32C	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO Learn More about Silicon Labs efr32bg22	Datasheet	232In Stock	$4.56 $3.64 $3.40 $3.07 View $2.90 $2.69 $2.65 $2.62	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	76.8 MHz	512 kB	32 kB	12 bit	18 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 768kB, 64kB(RAM), 20 GPIO EFR32MG21A010F768IM32-B Silicon Labs 1: $6.91 503In Stock	Mfr. Part No. EFR32MG21A010F768IM32-B Mouser Part No 634-MG21A010F76832B	Silicon Labs	RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 10dB, mesh multiprotocol, 768kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32mg21 socs	Datasheet	503In Stock	$6.91 $5.26 $4.86 $4.39 View $4.18 $4.05 $4.00 $3.96	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	40 MHz	768 kB	64 kB		20 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Bluetooth BLE IC, 4x4mm, Industrial Temp IS1871SF-202-TRAY Microchip Technology 1: $3.05 488In Stock	Mfr. Part No. IS1871SF-202-TRAY Mouser Part No 579-IS1871SF202-TRAY	Microchip Technology	RF System on a Chip - SoC Bluetooth BLE IC, 4x4mm, Industrial Temp Learn More about Microchip Technology microchip is1870 is1871 socs	Datasheet	488In Stock	$3.05 $2.79 $2.54	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	8051	8 bit	32 MHz	256 kB	24 kB	12 bit	15 I/O	- 40 C	+ 85 C	Tray
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 1024kB, 96kB(RAM), 20 GPIO EFR32BG21A010F1024IM32-B Silicon Labs 1: $8.08 31In Stock	Mfr. Part No. EFR32BG21A010F1024IM32-B Mouser Part No 634-BG21A010F102432B	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 1024kB, 96kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	31In Stock	$8.08 $6.60 $6.17 $5.67 View $5.29 $5.13 $5.05 $4.96	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	80 MHz	1 MB	96 kB	12 bit	20 I/O	- 40 C	+ 125 C	Tray
RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO EFR32BG21A010F512IM32-B Silicon Labs 1: $6.47 81In Stock	Mfr. Part No. EFR32BG21A010F512IM32-B Mouser Part No 634-BG21A010F51232B	Silicon Labs	RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 10dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO Learn More about Silicon Labs silabs efr32bg21 socs	Datasheet	81In Stock	$6.47 $5.22 $4.79 $4.32 View $4.08 $3.97 $3.82 $3.73	Min.: 1 Mult.: 1	RF System on a Chip - SoC	SMD/SMT	QFN-32	ARM Cortex M33	32 bit	40 MHz	512 kB	64 kB		20 I/O	- 40 C	+ 125 C	Tray