8051
A long-lived, byte-oriented MCU architecture still used in legacy and space-constrained embedded systems. This category lists classic and modern variants for protocol bridges, basic controllers, and low-cost appliances — check 8051 microcontroller parts for tried-and-true, compact designs.
Parts (10 families, 13 parts)
AT89C2051-24PU
Active
MCHPMicrochip Technology
The AT89C2051-24PU is a low-voltage, high-performance 8-bit microcontroller based on the MCS-51 architecture, featuring 2KB of Flash memory and 128 bytes of RAM. This 20-pin device provides a compact ...
EFM8BB21F16I-C-QFN20R
Active
SiLSilicon Labs
The EFM8BB21F16I-C-QFN20R is an 8-bit CIP-51 (8051-core) microcontroller from Silicon Labs, operating at up to 50MHz. It features 16KB of Flash memory and 2.25KB of RAM, making it suitable for a range...
STM8S003F3P6TR
Active
STMicroelectronicsThe STM8S003F3P6TR is an 8-bit value line microcontroller based on the high-performance STM8 core, featuring 8KB of Flash and 1K of RAM. It operates at 16MHz and is designed for cost-sensitive applica...
AT89S52-24PU
Active
MCHPMicrochip Technology
The AT89S52-24PU is a low-power, high-performance 8-bit CMOS microcontroller featuring 8KB of In-System Programmable (ISP) flash memory. Based on the industry-standard 80C51 architecture, it operates ...
AT89S8253-24AU
Active
MCHPMicrochip Technology
The AT89S8253-24AU is an 8-bit microcontroller based on the MCS-51 core, featuring 12KB of In-System Programmable (ISP) Flash memory and 2KB of EEPROM. Operating at speeds up to 24MHz, this MCU provid...
EFM8BB31F64G-D-QFN32
Active
SiLSilicon Labs
The EFM8BB31F64G-D-QFN32 is an 8-bit CIP-51 (8051-compatible) microcontroller from Silicon Labs, operating at up to 50 MHz. It features 64KB of Flash memory and 4.25KB of RAM, along with a range of in...
AT89S51-24PU
Active
MCHPMicrochip Technology
The Microchip AT89S51-24PU is an 8-bit microcontroller built on the classic 8051 architecture, offering 4KB of In-System Programmable (ISP) Flash memory and 128 bytes of RAM. It operates at speeds up ...
N76E003AT20
Active
Nuvoton Technology Corporation
The Nuvoton N76E003AT20 is a high-performance 1T 8051-based 8-bit microcontroller designed for low pin count applications. It operates over a wide voltage range of 2.4V to 5.5V and provides 18KB of Fl...
EFM8BB10F8G-A-SOIC16
Active
SiLSilicon Labs
The EFM8BB10F8G-A-SOIC16 is a high-performance 8-bit microcontroller from Silicon Labs' Busy Bee family, based on the CIP-51 8051 core. It operates at 25MHz and integrates essential peripherals into a...
AT89C55WD-24JU
Active
MCHPMicrochip Technology
The AT89C55WD-24JU is a high-performance 8-bit microcontroller based on the MCS-51 (8051) architecture, featuring 20KB of Flash memory and 256 bytes of RAM. It operates at speeds up to 24MHz and is de...
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