STM32F303CBT7 Price & Stock

Manufacturer
Integrated Circuits (ICs) > Embedded - Microcontrollers
IC MCU 32BIT 128KB FLASH 48LQFP
Specifications
Series STM32 F3
Part Status Active
Core Processor ARM® Cortex®-M4
Core Size 32-Bit
Speed 72MHz
Connectivity CAN, I²C, IrDA, LIN, SPI, UART/USART, USB
Peripherals DMA, I²S, POR, PWM, WDT
Number of I/O 37
Program Memory Size 128KB (128K x 8)
Program Memory Type FLASH
RAM Size 32K x 8
Voltage - Supply (Vcc/Vdd) 2 V ~ 3.6 V
Data Converters A/D 4x12b; D/A 2x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 105°C (TA)
Package / Case 48-LQFP
Supplier Device Package 48-LQFP (7x7)
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 5000
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STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 5000
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STM32F303CBT7 price|Allchips Limited
Allchips Limited
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST Microelectronics In-Stock
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STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP In-Stock
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STM32F303CBT7TR ST Microelectronics In-Stock
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STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP In-Stock
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STM32F303CBT7 price|Ersa Limited
Ersa Limited
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 1782
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 12500
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics Tray in stock
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STM32F303CBT7TR STMicroelectronics Tape & Reel (TR) in stock
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 11020
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STM32F303CBT7TR Renesas Electronics America Inc IC MCU 32BIT 512KB FLSH 100LFQFP 642
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics 100% new and original in stock
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STM32F303CBT7TR STMicroelectronics 100% new and original in stock
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics STMICROELECTRONICS STM32F303CBT7 MCU, 32BIT, CORTEX-M4, 72MHZ, LQFP-48 10872
1:  $17.604
10:  $16.607
100:  $15.667
500:  $14.781
Buy
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 7670
1:  $16.224
10:  $15.305
100:  $14.439
500:  $13.622
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Inquiry
STM32F303CBT7 price|Mouser
Mouser
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7
sku #: 511-STM32F303CBT7
STMicroelectronics ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 128 Kbytes of Flash
ARM Microcontrollers - MCU
1749 In Stock
1:  $7.07
10:  $6.39
25:  $5.30
100:  $5.29
250:  $5.05
500:  $4.60
1000:  $4.10
1500:  $3.95
Buy
STM32F303CBT7TR
sku #: 511-STM32F303CBT7TR
STMicroelectronics ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 128 Kbytes of Flash
ARM Microcontrollers - MCU
1465 In Stock
1:  $7.08
10:  $6.40
25:  $6.10
100:  $5.30
250:  $5.06
500:  $4.61
1000:  $4.14
2400:  $3.95
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics DC:24+ ; IC MCU 32BIT 128KB FLASH 48LQFP 41415
Inquiry
STM32F303CBT7TR STMicroelectronics DC:24+ ; IC MCU 32BIT 128KB FLASH 48LQFP 34321
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics STMICROELECTRONICS STM32F303CBT7 MCU, 32BIT, CORTEX-M4, 72MHZ, LQFP-48 ; 48-LQFP 18595
Buy
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP ; 48-LQFP 20238
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7
sku #: 2381-STM32F303CBT7
STMicroelectronics STMICROELECTRONICS STM32F303CBT7 MCU, 32BIT, CORTEX-M4, 72MHZ, LQFP-48 944
1:  $7.080
10:  $6.679
100:  $6.301
500:  $5.945
1000:  $5.608
Inquiry
STM32F303CBT7TR
sku #: 2381-STM32F303CBT7TR
STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 556
1:  $7.080
10:  $6.679
100:  $6.301
500:  $5.945
1000:  $5.608
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 10000
1:  $7.120
10:  $6.445
250:  $5.116
500:  $4.639
Buy
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 10000
1:  $3.921
2400:  $3.262
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 1423
$6.035
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Integrated Circuits (ICs)>Embedded - Microcontrollers
17579
2:  $3.858
25:  $3.692
50:  $3.552
100:  $3.431
250:  $3.327
Buy
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Integrated Circuits (ICs)>Embedded - Microcontrollers
7200
1:  $6.372
10:  $5.760
25:  $5.490
100:  $4.770
250:  $4.554
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 10000
1:  $7.120
10:  $6.445
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 10000
1:  $3.921
2400:  $3.262
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7TR STMicroelectronics 35000
$5.2696
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Embedded - Microcontrollers
3871
Buy
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Embedded - Microcontrollers
5333
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics 48-LQFP 2000
Inquiry
STM32F303CBT7TR STMicroelectronics 48-LQFP 2000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics ARM? Cortex?-M4 STM32F3 Microcontroller IC 32-Bit Single-Core 72MHz 128KB (128K x 8) FLASH 48-LQFP (7x7) 2933
Inquiry
STM32F303CBT7TR STMicroelectronics ARM? Cortex?-M4 STM32F3 Microcontroller IC 32-Bit Single-Core 72MHz 128KB (128K x 8) FLASH 48-LQFP (7x7) 10795
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 12000
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 12000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP ; 48-LQFP (7x7)
Embedded - Microcontrollers
Available
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP ; 48-LQFP (7x7)
Embedded - Microcontrollers
Available
Inquiry
STM32F303CBT7 price|Newark element14
Newark element14
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7
sku #: 99W9872
Stmicroelectronics Stmicroelectronics - Microcontroller Mcu, 32 Bit, Cortex-M4, 72Mhz, Lqfp-48 - Stm32F303Cbt7 |Stmicroelectronics STM32F303CBT7 in stock
$7.00
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics 21319
Inquiry
STM32F303CBT7TR STMicroelectronics 4689
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Embedded - Microcontrollers
In-Stock
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 25664
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 9157
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics 4000
Inquiry
STM32F303CBT7TR STMicroelectronics MCU 32-bit ARM Cortex M4 RISC 128KB Flash 2.5V/3.3V 48-Pin LQFP T/R 2000
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics
Inquiry
STM32F303CBT7TR STMicroelectronics
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 1323
Buy
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 65366
Buy
STM32F303CBT7 price|LCSC
LCSC
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics 128KB 2V~3.6V CM4 32KB 72MHz FLASH 37 LQFP-48(7x7) Microcontroller Units (MCUs/MPUs/SOCs) ROHS 17
1:  $5.609
10:  $5.361
30:  $5.211
100:  $5.084
Buy
STM32F303CBT7 price| Lvy Electronics
Lvy Electronics
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 2000
Inquiry
STM32F303CBT7 STMicroelectronics 2000
Inquiry
STM32F303CBT7TR 2000
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STM32F303CBT7TR STMicroelectronics 2000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics N.V. 4000
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STM32F303CBT7TR STMicroelectronics N.V. 4000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics MCU (MCU/MPU/SOC)
MCU (MCU/MPU/SOC)
1500
$2.80
Buy
STM32F303CBT7 CYPRESS
MCU (MCU/MPU/SOC)
5335
$1.37
Buy
STM32F303CBT7TR STMicroelectronics MCU (MCU/MPU/SOC)
MCU (MCU/MPU/SOC)
2400
$2.80
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics Available, Contact us 4500
Inquiry
STM32F303CBT7TR STMicroelectronics Available, Contact us 2400
Inquiry
STM32F303CBT7 price|Win Source
Win Source
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP / ARM® Cortex®-M4 series Microcontroller IC 32-Bit Single-Core 72MHz 128KB (128K x 8) FLASH 48-LQFP (7x7) 29411
9:  $6.218
Buy
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 29400
9:  $6.218
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics Brand new and original/respond online to quote. 15058
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics New and Original 2818
1:  $52.102
10:  $46.892
100:  $44.287
1000:  $41.682
10000:  $39.077
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics 1,285
Inquiry
STM32F303CBT7TR STMicroelectronics 1000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST IN STOCK Immediate delivery 154
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics Purchase Online. Ship Immediately. 128KB ARM Cortex-M4 32KB 72MHz FLASH 37 LQFP-48(7x7) Microcontroller Units (MCUs/MPUs/SOCs) ROHS 19
100:  $7.671
30:  $7.862
10:  $8.089
1:  $8.463
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMICROELECTRONICS (EUR S&D) 1250
Inquiry
STM32F303CBT7TR STE 2400
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP ; DC:21+ ; 48-LQFP (7x7) 111
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP ; DC:21+ ; 48-LQFP (7x7) 111
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMICRO New and original 1,250
Inquiry
STM32F303CBT7 ST LQFP-48(7x7) 5346
Inquiry
STM32F303CBT7TR ST NEW 7491
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics 48-LQFP New and original,In Stock 14430
Inquiry
STM32F303CBT7TR STMicroelectronics 48-LQFP New and original,In Stock 17025
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST In stock,ready for shipping ; QFP 3115
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 SMD 5000
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST IN STOCK 204
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 34102
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 16394
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics Check alternative solution with competitive price 37522
$6.8295
Inquiry
STM32F303CBT7TR STMicroelectronics Check alternative solution with competitive price 14715
$3.912
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STM 1348
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STM32F303CBT7 STMicroelectronics 1155
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7
sku #: STM32F303CBT7
ST 250
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST IN STOCK Immediate delivery 154
Inquiry
STM32F303CBT7 price|Ariat Technology
Ariat Technology
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Specialized ICs
2846
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics LQFP-48(7x7) 2500
Inquiry
STM32F303CBT7TR STMicroelectronics LQFP-48(7x7) 2500
Inquiry
STM32F303CBT7 price|Chip One Exchange
Chip One Exchange
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7Â ST Microelectronics AVAILABLE 5850
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STM32F303CBT7Â ST Microelectronics - AVAILABLE 5850
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STM32F303CBT7 ST Microelectronics - AVAILABLE 1625
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STM IC MCU 32BIT 128KB FLASH 48LQFP 6916
2.9204
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP
Embedded - Microcontrollers
3333
10:  $9.25
100:  $9.00
1000:  $9.00
2500:  $9.00
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP 2500
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP ; DC:21+ ; 48-LQFP (7x7) 100
Inquiry
STM32F303CBT7TR STMicroelectronics IC MCU 32BIT 128KB FLASH 48LQFP ; DC:21+ ; 48-LQFP (7x7) 100
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMICROELECTRONICS OEM/CM QUOTES ONLY | NO BROKERS 3445
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST/ DC:18+19 ; SMD 5104
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics In Stock
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST IN STOCK Immediate delivery 164
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 new and original ROHS ; DC:18+19 ; SMD 104
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST QFP-48 ; DC:2022+ 101
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics ARM Microcontrollers - MCU Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 128 Kb in stock
Inquiry
STM32F303CBT7 STMicroelectronics Microcontrollers - MCU ARM Microcontrollers - MCU 16/32-BITS MICROS in stock
Inquiry
STM32F303CBT7TR STMicroelectronics ARM Microcontrollers - MCU Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 128 Kb in stock
Inquiry
STM32F303CBT7TR STMicroelectronics Microcontrollers - MCU ARM Microcontrollers - MCU 16/32-BITS MICROS in stock
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics STM 2021+RoHS 6000
Buy
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 ST DC:16+ ; QFP 5
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics ARM Microcontrollers - MCU 16/32-BITS MICROS 2990
$7.54
Inquiry
STM32F303CBT7TR STMicroelectronics ARM Microcontrollers - MCU 16/32-BITS MICROS 2399
$7.54
Inquiry
Part # Manufacturer Description Stock Price Buy
STM32F303CBT7
sku #: STM32F303CBT7
STMICROELECTRONICS 2272
Inquiry
STM32F303CBT7TR
sku #: STM32F303CBT7TR
STMicroelectronics 2501
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7 STMicroelectronics OEM/CM ONLY 1107
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STM32F303CBT7 price|Farnell element14
Farnell element14
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Part # Manufacturer Description Stock Price Buy
STM32F303CBT7
sku #: 2333361
STMicroelectronics STMicroelectronics - Mcu, 32Bit, Cortex-M4, 72Mhz, Lqfp-48 - Stm32F303Cbt7 |STMicroelectronics STM32F303CBT7 in stock
£7.43
Buy
See Also:
STM32F303VBT7 STM32F303RBT7 STM32F103CBT7 STM32F302CBT7 STM32F303CBT6 STM32F373CBT7 STM32F303CCT7 STM32F302C8T7 STM32F303R8T7 STM32F103C6T7 STM32F303RDT7 STM32F303VBT6 STM32F303RCT7 STM32F301C8T7 STM32F302RBT7 STM32F301C6T7 STM32F303VCT7 STM32F303VET7 STM32F103RBT7 STM32F373VBT7 STM32F373CBT6 STM32F303CCT6 STM32F303C6T6 STM32F103VBT7 STM32F103CBT6 STM32F302CCT7 STM32F302CBT6 STM32F373RBT7 STM32F303RET7 STM32F303ZDT7 STM32F303C8T6 STM32F303CBT7TR STM32F373CCT7 STM32F103C8T7 STM32F303RBT6 STM32F303ZET7 STM32F103CBT STM32F030CBT6 STM32F301K6T7 STM32F103RBT STM32F103CB STM32F302CCT6 STM32F103C8T8 STM32F303VET6 STM32F313CCT6 STM32F301C8T6 STM32F103S6T7 STM32F103C6T6 STM32F302C4T6 More » STM32F303RDT6 STM32F334C6T7 STM32F038C6T7 STM32F091CBT7 STM32F401CBU7 STM32F302RBT6 STM32F100CBT6 STM32F302RCT7 STM32F302RET7 STM32F103RBT6 STM32F103C4T6 STM32F103C8T STM32F103VCT7 STM32F303ZET6 STM32F100CBT7B STM32F207CBT6 STM32F303RBT7TR STM32F301C4T6 STM32F373RBT6 STM32F031C6T7 STM32F205RBT7 STM32F302VBT6 STM32F373CCT6 STM32F372CBT6 STM32F072CBT7 STM32F302VCT7 STM32F103RET7 STM32F301K8T7 STM32F103VBH7 STM32F103VBT6 STM32F373C8T6 STM32F103ZCT7 STM32L433CBT7 STM32F103CBU6 STM32F373VBT6 STM32F302C8T6 STM32F103VFT7 STM32F103RBH7 STM32F303RCT6 STM32F400CBT6 STM32F303VCT6 STM32F103TBU7 STM32F301C6T6 STM32F303R6T6 STM32F303RET6 STM32F101CBT6 STM32F103ZET7 STM32F102CBT6 STM32F103C6T7A STM32F302C6T6 STM32F103RGT7 STM32F103VDT7 STM32F071CBT7 STM32F303CBT6TR STM32F103CBT7TR STM32F303R8T6 STM32F103VGT7 STM32F103R8T7 STM32F103C8T6 STM32F103VET7 STM32F302RDT7 STM32F303VEH7 STM32F303K8T6 STM32F303VDT6 STM32F103RCT7 STM32F303K6T6 STM32F303ZDT6 STM32F334C8T7 STM32F302R8T7 STM32F334R8T7