Datasheet for the older ATmega161 AVR microcontroller, a 1.65 MB PDF document. It details pin functions, the memory map, peripherals such as timers and UARTs…

Full datasheet for the ATmega32 AVR microcontroller in PDF form, 2.70 MB. It describes the pinout, memory, clock options, timers, ADC, USART, SPI, TWI, JTAG interface…

Complete datasheet for the ATmega8535 AVR microcontroller in a 2.44 MB PDF. It covers the 40-pin and surface-mount pinouts, memory, timers, ADC, USART, SPI, TWI, fuse…

Full datasheet for the Atmel ATmega169 8-bit AVR microcontroller, with the name indicating coverage of silicon revisions A through E.

Semiconductor datasheet saved as a 134 KB PDF under the document number SDZS005. The name reveals neither the component nor its maker, so treat it as unidentified until…

Datasheet for the Microchip PIC16F818 and PIC16F819, 18-pin flash microcontrollers, supplied as a 2.97 MB PDF.

Datasheet for the Microchip PIC16F84A, a classic 18-pin flash microcontroller with data EEPROM, provided as a 1.46 MB PDF.

The name SDLS175 identifies this 515 KB PDF only as a document code, not as a particular part.

Full Atmel datasheet for the AT89S8253, an 8051-compatible microcontroller with 12 KB of in-system programmable flash and 2 KB of onboard EEPROM.

PDF datasheet for the Atmel AT89S51, an 8051-compatible microcontroller with 4 KB of in-system programmable flash and 128 bytes of RAM.

Generic datasheet PDF of roughly one megabyte; the name carries no part number or manufacturer, so the component it covers is only visible once the document is opened.

Application note on the AT24XX series of serial EEPROMs, delivered as a 75.7 KB PDF. These small I2C memories hold settings, calibration data and serial numbers on TVs…