8051 C8051F58x Microcontroller IC 8-Bit 50MHz 128KB (128K x 8) FLASH 48-TQFP (7x7)
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C8051F581-IQR

DigiKey Part Number
336-4821-2-ND - Tape & Reel (TR)
336-4821-1-ND - Cut Tape (CT)
336-4821-6-ND - Digi-Reel®
Manufacturer
Manufacturer Product Number
C8051F581-IQR
Description
IC MCU 8BIT 128KB FLASH 48TQFP
Customer Reference
Detailed Description
8051 C8051F58x Microcontroller IC 8-Bit 50MHz 128KB (128K x 8) FLASH 48-TQFP (7x7)
Datasheet
 Datasheet
EDA/CAD Models
C8051F581-IQR Models
Product Attributes
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Category
Program Memory Size
Mfr
Program Memory Type
FLASH
Series
RAM Size
8.25K x 8
Packaging
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Voltage - Supply (Vcc/Vdd)
1.8V ~ 5.25V
Part Status
Last Time Buy
Data Converters
A/D 32x12b
DigiKey Programmable
Not Verified
Oscillator Type
Internal
Core Processor
8051
Operating Temperature
-40°C ~ 125°C (TA)
Core Size
Mounting Type
Surface Mount
Speed
50MHz
Supplier Device Package
48-TQFP (7x7)
Connectivity
EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART
Package / Case
48-TQFP
Peripherals
POR, PWM, Temp Sensor, WDT
Base Product Number
Number of I/O
40
Environmental & Export Classifications
Product Questions and Answers
Additional Resources
Substitutes (1)
Part NumberManufacturerQuantity AvailableDigiKey Part NumberUnit PriceSubstitute Type
EFM8BB31F64I-D-QFN32RSilicon Labs0336-EFM8BB31F64I-D-QFN32RTR-ND$97.48930MFR Recommended
In-Stock: 657
Check for Additional Incoming Stock
Last Time Buy Date: 10/09/2026
All prices are in NZD
Cut Tape (CT) & Digi-Reel®
QuantityUnit PriceExt Price
1$28.26000$28.26
10$22.99000$229.90
25$21.34440$533.61
100$19.37960$1,937.96
250$19.20296$4,800.74
* All Digi-Reel orders will add a $10.00 reeling fee.
Tape & Reel (TR)
QuantityUnit PriceExt Price
500$17.27862$8,639.31
1,000$16.82564$16,825.64
Manufacturers Standard Package
Unit Price without GST:$28.26000
Unit Price with GST:$32.49900