PDF datasheet for the Atmel AT89C1051, the smallest member of the 20-pin 8051-compatible family, offering 1 KB of flash, 64 bytes of RAM and an analog comparator.

Microchip datasheet for the PIC16F8x devices, the classic 18-pin flash and EEPROM microcontrollers of the PIC16F83 and PIC16F84 type, in a 1.97 MB PDF.

Datasheet for the Microchip PIC16C505, a small 14-pin microcontroller from the baseline PIC range, provided as a 1.18 MB PDF.

A 5.14 MB PDF datasheet covering the Microchip PIC18Cxx2 group of microcontrollers, where xx stands for several family members sharing one document.

Datasheet for the Microchip PIC16F870 and PIC16F871 flash microcontrollers, a 2.76 MB PDF.

Datasheet for the Atmel AT89S52, one of the most popular 8051-compatible microcontrollers, with 8 KB of ISP flash, 256 bytes of RAM and three 16-bit timers.

A 3.50 MB PDF datasheet from Microchip describing the PIC16C717, PIC16C770 and PIC16C771 microcontrollers in one shared document.

A 1.78 MB PDF datasheet for the tiny2313, consistent with the Atmel AVR ATtiny2313 microcontroller.

Complete 3.65 MB datasheet for the mega640, 1281, 1280, 2561 and 2560, consistent with the Atmel AVR ATmega640/1280/1281/2560/2561 family, the larger AVR parts in 64 and…

Complete datasheet in PDF form, 1.23 MB, for the tiny26, which corresponds to the Atmel AVR ATtiny26 8-bit microcontroller. No revision is given in the name.

Full family datasheet, 1.60 MB PDF, covering the tiny24, tiny44 and tiny84, consistent with the Atmel AVR ATtiny24/44/84 microcontrollers.

Small 38 KB PDF referencing the Microchip PIC18F8580, with the PIC18F8680 noted alongside it in the file name.

Short Atmel document tied to the AT89S8253 microcontroller, marked AN in the name, which most likely indicates an application note rather than the full datasheet.

Datasheet in PDF form for the Atmel AT89C2051, a 20-pin 8051-family microcontroller with 2 KB of flash, 128 bytes of RAM and a built-in analog comparator on P1.0 and…

A 1.38 MB full datasheet covering the tiny13, which matches the widely used Atmel AVR ATtiny13 microcontroller in small 8-pin packages. The file name lists no revision.

Short summary datasheet for the ATmega162 AVR microcontroller, a 195 KB PDF. Summary editions normally include the feature list, pin diagrams for available packages, pin…

Microchip PIC18F458 datasheet, a 3.95 MB PDF; the name also mentions 448, suggesting the PIC18F448 is covered in the same document.

Combined datasheet for the Microchip PIC16F7x series of flash microcontrollers, provided as a 3.95 MB PDF.

Summary datasheet for the ATmega8535 AVR microcontroller, 217 KB in PDF format. The short edition generally lists features, pinouts for the DIP and surface-mount…

Full datasheet, 1.77 MB PDF, for the mega8515, matching the Atmel AVR ATmega8515 microcontroller, which supports an external memory interface.

Datasheet for the early ATmega103 AVR microcontroller, a 1.99 MB PDF. It documents the 64-pin pinout, memory, peripherals, programming modes and electrical…

Short summary datasheet for the ATmega128 AVR microcontroller, 235 KB in PDF format. It generally contains the feature overview, 64-pin package pinout, pin descriptions…

Datasheet for the Microchip PIC18F452, an enhanced flash 8-bit microcontroller, in a 5.44 MB PDF.

Microchip PIC16F62x datasheet, a 4.09 MB PDF covering the 18-pin flash microcontroller family that includes parts such as the PIC16F627 and PIC16F628.

Microchip PIC16C432 datasheet, supplied as a 1.61 MB PDF. This OTP microcontroller includes an integrated LIN bus transceiver, which places it in automotive body…

Condensed summary datasheet for the ATmega64 AVR microcontroller, a 211 KB PDF. The short version usually contains the feature overview, pinout for the available…

Summary datasheet for the ATmega406 AVR microcontroller, a 179 KB PDF. The ATmega406 is aimed at smart battery management, so this part often turns up inside laptop and…

Complete datasheet for the ATmega164, ATmega324 and ATmega644 AVR microcontrollers, a 2.66 MB PDF.

Summary datasheet for the tiny13, a 169 KB PDF whose s suffix identifies the abbreviated edition, matching the Atmel AVR ATtiny13 microcontroller.

Full datasheet for the Atmel ATmega8 8-bit AVR microcontroller, supplied as a 2.17 MB PDF.

Complete datasheet for the ATmega165 AVR microcontroller, a 3.15 MB PDF. The document covers the pinout, memory, clock system, timers, USI, USART, ADC, JTAG, fuse bits…

Complete datasheet for the ATmega16 AVR microcontroller in a 2.73 MB PDF. Chapters cover the pinout, memory, clock options, timers, ADC, USART, SPI, TWI, JTAG, fuse and…

Microchip PIC18C601 and PIC18C801 datasheet in a 5.62 MB PDF. These are ROMless microcontrollers designed to run from external program memory, so boards using them also…

An 804 KB full datasheet for the tiny15, consistent with the Atmel AVR ATtiny15 8-bit microcontroller. No revision appears in the name.

Summary datasheet for the ATmega164, ATmega324 and ATmega644 family of AVR microcontrollers, a compact 297 KB PDF.

Summary edition of the ATmega8515 AVR microcontroller datasheet, a 182 KB PDF. It usually lists core features, pin configurations for each package, pin descriptions and…

Condensed summary datasheet, 203 KB PDF, covering the tiny24, tiny44 and tiny84 together, matching the Atmel AVR ATtiny24/44/84 family that shares one pinout with…

Summary datasheet for the tiny26, a 161 KB PDF whose s suffix denotes the abbreviated edition, matching the Atmel AVR ATtiny26 microcontroller.

Summary datasheet for the mega16, 243 KB PDF, matching the Atmel AVR ATmega16 8-bit microcontroller; the s suffix marks the short edition.

Full datasheet for the ATmega169 AVR microcontroller, distributed as a 2.97 MB PDF. This part includes an integrated LCD controller, and the document covers its segment…