Microcontrollers (MCUs)

Intel 8748 EEPROM © Intel
Intel 8748 EEPROM © Intel

MCS-48

The MCS-48 microcontroller (µC) series, Intel's first microcontroller, was originally released in 1976. Its first members were 8048, 8035 and 8748. The MCS-48 series has a Modified Harvard architecture, with internal or external program ROM and 64–256 bytes of internal (on-chip) RAM. The I/O is mapped into its own address space, separate from programs and data. The 8048 is probably the most prominent member of Intel's MCS-48 family of microcontrollers.

NEC D8741AD

NEC D8741AD Front View
NEC D8741AD Back View
NEC D8741AD Side View

D8741AD
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MCS-51

The Intel MCS-51 (commonly referred to as 8051) is a Harvard architecture, CISC instruction set, single chip MCU series which was developed by Intel in 1980 for use in embedded systems.

Intel's original versions were popular in the 1980s and early 1990s and enhanced binary compatible derivatives remain popular today. Intel's original MCS-51 family was developed using NMOS technology, but later versions, identified by a letter C in their name (e.g., 80C51) used CMOS technology and consume less power than their NMOS predecessors. This made them more suitable for battery-powered devices.

Intel C8751-8

The 8751 has integrated EPROM instead of a one-time programmable ROM as the 8051 has.

Intel C8751-8 Front View
Intel C8751-8 Back View
Intel C8751-8 Side View

C8751-8
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Intel D8751H

Intel D8751H Front View
Intel D8751H Back View
Intel D8751H Side View

D8751H
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Atmel AVR

The AVR is a modified Harvard architecture 8-bit RISC single chip microcontroller which was developed by Atmel in 1996. The AVR was one of the first microcontroller families to use on-chip flash memory for program storage, as opposed to one-time programmable ROM, EPROM, or EEPROM used by other microcontrollers at the time. megaAVR chips became extremely popular after they were designed into the 8-bit Arduino platform.

Atmel ATmega8515-16PU

Atmel ATmega8515-16PU Front View
Atmel ATmega8515-16PU Back View

Oh whoops. Seems like the side picture is missing. It's because I forgot to take one and it has been already built into a project. Sorry for that.


ATmega8515-16PU
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Atmel ATmega16-16PU


Atmel ATmega328P-PU

The brain of many of the Arduino development boards - ATmega328P microcontroller.

Atmel ATmega328P-PU Front View
Atmel ATmega328P-PU Back View

Side picture to be added soon.


ATmega328P-PU
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