STM32F301K8U7 Price & Stock

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Manufacturer
Electronic & Electrical Components > Semiconductors - ICs > Microcontrollers > Microcontrollers (MCU) - 32 Bit
MCU 32BIT CORTEX-M4 72MHZ UFQFPN-32
Specifications
Architecture ARM Cortex-M4
CPU Speed 72MHz
Program Memory Size 64KB
RAM Memory Size 16KB
No. of Pins 32Pins
MCU Case Style UFQFPN
No. of I/O's 24I/O's
Embedded Interface Type I2C SPI USART
Supply Voltage Min 2V
Supply Voltage Max 3.6V
Packaging Each
Product Range STM32 F3 ARM Cortex-M4 Microcontrollers
Automotive Qualification Standard -
MSL MSL 3 - 168 hours
SVHC No SVHC (17-Dec-2015)
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR ST New Original ; DC:21+ 10340
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 11821
$4.075
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics Tray in stock
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STM32F301K8U7TR STMicroelectronics Tape & Reel (TR) in stock
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7
sku #: 3958081-STM32F301K8U7
STMicroelectronics ARMR CortexR-M4 series Microcontroller IC 32-Bit 72MHz 64KB (64K x 8) FLASH 32-UFQFPN (5x5) ; 32-UFQFPN (5x5) 1872
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 ST DC:22+ 8000
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STM32F301K8U7 price|IC Online Co.,Ltd
IC Online Co.,Ltd
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics 100% new and original in stock
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STM32F301K8U7TR STMicroelectronics 100% new and original in stock
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics STMICROELECTRONICS STM32F301K8U7 32 Bit Microcontroller, ARM Cortex-M4, 72 MHz, 64 KB, 16 KB, 32 Pins, UFQFPN 2743
1:  $31.678
10:  $29.885
100:  $28.193
500:  $26.597
1000:  $25.092
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Integrated Circuits (ICs)>Embedded - Microcontrollers
13171
1:  $4.302
10:  $3.168
100:  $3.006
250:  $2.691
500:  $2.277
Buy
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Integrated Circuits (ICs)>Embedded - Microcontrollers
25200
3:  $3.455
10:  $3.147
100:  $2.655
250:  $2.518
500:  $2.281
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN ; 32-UFQFPN (5x5)
Embedded - Microcontrollers
Available
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics ARM? Cortex?-M4 STM32F3 Microcontroller IC 32-Bit Single-Core 72MHz 64KB (64K x 8) FLASH 32-UFQFPN (5x5) 27459
Inquiry
STM32F301K8U7TR STMicroelectronics ARM? Cortex?-M4 STM32F3 Microcontroller IC 32-Bit Single-Core 72MHz 64KB (64K x 8) FLASH 32-UFQFPN (5x5) 29315
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics DC:24+ ; IC MCU 32BIT 64KB FLASH 32UFQFPN 48352
Inquiry
STM32F301K8U7TR STMicroelectronics DC:24+ ; IC MCU 32BIT 64KB FLASH 32UFQFPN 40161
Inquiry
STM32F301K8U7 price|Ersa Limited
Ersa Limited
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 10978
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 5000
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 5000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 10000
1:  $4.160
10:  $3.764
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 10000
1:  $2.287
3000:  $2.003
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 10000
1:  $4.160
Buy
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 10000
1:  $2.287
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics
Inquiry
STM32F301K8U7TR STMicroelectronics
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Embedded - Microcontrollers
5526
Buy
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFN
Embedded - Microcontrollers
2890
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR STMicroelectronics 35000
$3.1962
Inquiry
STM32F301K8U7 price|Mouser
Mouser
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7
sku #: 511-STM32F301K8U7
STMicroelectronics ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 64 Kbytes of Flash 7
ARM Microcontrollers - MCU
2274 In Stock
1:  $3.36
10:  $2.48
100:  $2.35
250:  $2.24
2940:  $2.21
Buy
STM32F301K8U7TR
sku #: 511-STM32F301K8U7TR
STMicroelectronics ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 64 Kbytes of Flash 7
ARM Microcontrollers - MCU
3000 In Stock
1:  $4.78
10:  $4.30
100:  $3.52
250:  $3.34
500:  $3.00
1000:  $2.83
3000:  $2.40
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 3887
1:  $24.996
10:  $22.888
100:  $21.048
500:  $19.861
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics 11359
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STM32F301K8U7TR STMicroelectronics 2017
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 12000
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFN 12000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics ARM? Cortex?-M4 STM32F3 Microcontroller IC 32-Bit Single-Core 72MHz 64KB (64K x 8) FLASH 32-UFQFPN (5x5) ; Tray 3704
Inquiry
STM32F301K8U7TR STMicroelectronics ARM? Cortex?-M4 STM32F3 Microcontroller IC 32-Bit Single-Core 72MHz 64KB (64K x 8) FLASH 32-UFQFPN (5x5) ; Tape & Reel (TR) 7826
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 ST DC:21+ ; SMD /PB 44278
Inquiry
STM32F301K8U7TR ST DC:21+ ; SMD /PB 46209
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics UFQFPN-32(5x5) 2500
Inquiry
STM32F301K8U7TR STMicroelectronics 32-UFQFN 2500
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics Available, Contact us 2940
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STM32F301K8U7TR STMicroelectronics Available, Contact us 6000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 370
Buy
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 65366
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 Microchip Technology IC MCU 16BIT 128KB FLASH 64QFN 11567
Inquiry
STM32F301K8U7TR Microchip Technology IC MCU 16BIT 32KB FLASH 44QFN 7168
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 4341
1:  $30.016
10:  $28.317
100:  $26.714
500:  $25.202
Buy
STM32F301K8U7 price|Win Source
Win Source
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 2940
2:  $49.332
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Embedded - Microcontrollers
In-Stock
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFN
Embedded - Microcontrollers
In-Stock
Inquiry
STM32F301K8U7 price|Ample Chip
Ample Chip
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 28846
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 48100
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 ST UFQFPN-32(5x5) 4720
Inquiry
STM32F301K8U7TR STMICRO New and original 21,000
Inquiry
STM32F301K8U7TR ST The original 8900
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics 32-UFQFN Exposed Pad New and original,In Stock 15920
Inquiry
STM32F301K8U7TR STMicroelectronics 32-UFQFPN (5x5) New and original,In Stock 14581
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics Check alternative solution with competitive price 66554
$4.614
Inquiry
STM32F301K8U7TR STMicroelectronics Check alternative solution with competitive price 36832
$3.955
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 13397
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 6274
Inquiry
STM32F301K8U7 price|Allchips Limited
Allchips Limited
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN In-Stock
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN In-Stock
Inquiry
STM32F301K8U7 price|Allelco Limited
Allelco Limited
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Integrated Circuits (ICs) > Embedded - Microcontrollers
59263
Inquiry
STM32F301K8U7TR STMicroelectronics
Integrated Circuits (ICs) > Specialized ICs
7650
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR
sku #: STM32F301K8U7TR
ST 3000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR STM 6000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR STMicroelectronics 18480
Inquiry
STM32F301K8U7TR STM 20790
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 4469
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 13033
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 2500
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Embedded - Microcontrollers
260
10:  $2.08
100:  $1.64
1000:  $1.50
2500:  $1.50
Inquiry
STM32F301K8U7 price|Chip One Exchange
Chip One Exchange
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7TR ST Microelectronics - AVAILABLE 27300
Inquiry
STM32F301K8U7 price|Ariat Technology
Ariat Technology
Certificates
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN
Specialized ICs
3000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics Brand new and original/respond online to quote. 6326
Inquiry
STM32F301K8U7TR STMicroelectronics Brand new and original/respond online to quote. 7295
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics In Stock
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STM32F301K8U7TR STMicroelectronics In Stock
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics MCU 32-bit ARM Cortex M4 RISC 64KB Flash 2.5V/3.3V 32-Pin UFQFPN EP Tray 18
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics N.V. 4000
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STM32F301K8U7TR STMicroelectronics N.V. 4000
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics ARM Microcontrollers - MCU 16/32-BITS MICROS in stock
Inquiry
STM32F301K8U7 STMicroelectronics Microcontrollers - MCU ARM Microcontrollers - MCU Analog and DSP with FPU ARM Cortex-M4 MCU with 64 in stock
Inquiry
STM32F301K8U7TR STMicroelectronics ARM Microcontrollers - MCU Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 64 Kby in stock
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN in stock
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 ST QFN-32 ; DC:2022+ 1001
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN ; DC:21+ ; 32-UFQFPN (5x5) 111
Inquiry
STM32F301K8U7 STMÒâ·¨ DC:1912+ ; QFN32 63
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN ; DC:21+ ; 32-UFQFPN (5x5) 111
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics 1000
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STM32F301K8U7TR STMicroelectronics 1000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics ST 2018+RoHS 6000
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics MCU (MCU/MPU/SOC)
MCU (MCU/MPU/SOC)
2940
$1.70
Buy
STM32F301K8U7TR STMicroelectronics 3000
$1.70
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics MCU 32-bit ARM Cortex M4 RISC 64KB Flash 2.5V/3.3V 32-Pin UFQFPN EP Tray 2000
Inquiry
STM32F301K8U7TR STMicroelectronics MCU 32-bit ARM Cortex M4 RISC 64KB Flash 2.5V/3.3V 32-Pin UFQFPN EP T/R 5000
Inquiry
STM32F301K8U7 price| Lvy Electronics
Lvy Electronics
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 2000
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STM32F301K8U7 STMicroelectronics 2000
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STM32F301K8U7TR 2000
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STM32F301K8U7TR STMicroelectronics 2000
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7
sku #: 2381-STM32F301K8U7
STMicroelectronics STMICROELECTRONICS STM32F301K8U7 32 Bit Microcontroller, ARM Cortex-M4, 72 MHz, 64 KB, 16 KB, 32 Pins, UFQFPN 10976
1:  $3.360
10:  $3.170
100:  $2.990
500:  $2.821
1000:  $2.661
Inquiry
STM32F301K8U7TR
sku #: 2381-STM32F301K8U7TR
STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 8369
1:  $3.360
10:  $3.170
100:  $2.990
500:  $2.821
1000:  $2.661
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN ; DC:21+ ; 32-UFQFPN (5x5) 100
Inquiry
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN ; DC:21+ ; 32-UFQFPN (5x5) 100
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics ARM Microcontrollers - MCU 16/32-BITS MICROS 165
$4.57
Inquiry
STM32F301K8U7TR STMicroelectronics ARM Microcontrollers - MCU 16/32-BITS MICROS in stock
$4.57
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 ST In-Stock
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STM32F301K8U7TR ST In-Stock
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics STMICROELECTRONICS STM32F301K8U7 32 Bit Microcontroller, ARM Cortex-M4, 72 MHz, 64 KB, 16 KB, 32 Pins, UFQFPN ; 32-UFQFN Exposed Pad 2969
Buy
STM32F301K8U7TR STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN ; 32-UFQFN Exposed Pad 3017
Buy
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 ST DC:16+ 20000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics 32-UFQFN Exposed Pad 2000
Inquiry
STM32F301K8U7TR STMicroelectronics 32-UFQFN Exposed Pad 2000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7
sku #: STM32F301K8U7
STMicroelectronics 2731
Inquiry
STM32F301K8U7TR
sku #: STM32F301K8U7TR
STMICROELECTRONICS 7022
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics IC MCU 32BIT 64KB FLASH 32UFQFPN 12500
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F301K8U7 STMicroelectronics New and Original 2810
1:  $2.950
10:  $2.655
100:  $2.507
1000:  $2.360
10000:  $2.212
Inquiry
STM32F301K8U7 price|Farnell element14
Farnell element14
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Part # Manufacturer Description Stock Price Buy
STM32F301K8U7
sku #: 2503251
STMicroelectronics STMicroelectronics - Mcu, 32Bit, Cortex-M4, 72Mhz, Ufqfpn-32 - Stm32F301K8U7 |STMicroelectronics STM32F301K8U7 out of stock
£3.54
Buy
See Also:
STM32F301K8T7 STM32F301K6U7 STM32F302K8U7 STM32F301K8U6 STM32F302K8U6 STM32F301K8U7TR STM32F301K8T6 STM32F318K8U7 STM32F301K6T7 STM32F301C8T7 STM32F301K4U6 STM32F051K8U7 STM32F301K6U6 STM32F301K6T6 STM32F051K4U7 STM32F302C8T7 STM32F301K6U7TR STM32F301C8T6 STM32F051K6U7 STM32F051K8U6 STM32F302K4U6 STM32F303K8T6 STM32L051K8U7 STM32F401CBU7 STM32F301K8U6TR STM32F101T8U6 STM32G031K8U7 STM32F301R8T6 STM32F318K8U6 STM32F101C8U6 STM32F401CCU7 STM32F051K8T7 STM32F051C8U7 STM32F301C6T7 STM32F302K6U6 STM32F071C8U7 STM32F303R8T7 STM32F031K6U7 STM32F302R8T7 STM32F103T8U7 STM32F334K8U6 STM32F334K8T7 STM32F101T4U6 STM32F328K8T6 STM32F103C8U6 STM32F302RBT7 STM32F302VCT7 STM32F091CCU7 STM32F301VCT6 More » STM32F051R8H7 STM32L051K8T7 STM32F401RDT7 STM32F301R6T6 STM32F101T6U6 STM32F042K6U7 STM32F302CCT7 STM32F103TBU7 STM32F051C8U7S STM32F301V STM32F401RET7 STM32F401RCT7 STM32F072C8U7 STM32F071CBU7 STM32F302RCT7 STM32F105R8T7 STM32L041K6U7 STM32F051K8 STM32F303VET7 STM32F071V8T7 STM32F051K86 STM32F302RET7 STM32F10387 STM32F051K6T7 STM32F303ZET7 STM32F101R8T6 STM32G431K8U6 STM32F401VCH7 STM32F401CBU6 STM32L071K8U6 STM32F101C8T6 STM32F411CCU7 STM32F301K8T6TR STM32F101B8T6 STM32F031K4U6 STM32L051K8U6 STM32F051K6U6 STM32F401CDU6 STM32L031K6U7 STM32F401CBU3 STM32F303RDT7 STM32F303VBT7 STM32L071K8U3 STM32F031G6U7 STM32G051K8U6 STM32F303CCT7 STM32F334K6T7 STM32F302R8T6 STM32F401VEH7 STM32F301C4T6 STM32F303ZDT7 STM32F401VCT7 STM32F301C6T6 STM32F302CBT7 STM32F101CBU6 STM32F101V8T6 STM32F051C8U6 STM32F303C8T6 STM32F051K4U6 STM32F103C8T7 STM32F103T8U6 STM32G031K8T7 STM32F411CEU7 STM32F301K6U6TR STM32F303CBT7 STM32F031G4U7 STM32F302C8T6 STM32F051R8T7 STM32F051K8U7TR STM32F031K6T7