Atmel AVR ATtiny comparison chart

Atmel is a manufacturer of semiconductors, founded in 1984. One of its main products is microcontrollers. The smallest in their AVR family of microcontrollers are the ATtiny series (8-bit core and fewer features, fewer I/O pins, and less memory than other AVR series).

This table sums up the most interesting features of the current line-up of ATtiny microcontrollers, for easy comparison.

Device (family)^[1]	First issued (datasheet)	GCC architecture identifier ^[2]	I/O pins	Packages	Flash (KiB)	RAM (bytes)	EEPROM (bytes)	TWI	USI	SPI	UART	8-bit counters	16-bit counters	PWM	ADC	Max clock frequency (MHz)
ATtiny28l	2005/03	avr1	11	PDIP-28 TQFP/QFN/MLF-32	2	32	-	-	-	-	-	1	-	1 x 1	-	4
ATtiny26	2003/02	avr2	16	PDIP-20 SOIC-20 QFN/MLF-32	2	128	128	-	1	-	-	2	-	1 x 2	11 ch / 10 b	16
ATtiny13 / ATtiny13a	2003/06 2008/05(a)	avr25	6	PDIP-8 SOIC-8 MLF-10 MLF-20	1	64	64	-	-	-	-	1	-	1 x 2	4 ch / 10 b	20
ATtiny25 / ATtiny45 / ATtiny85	2005/02	avr25	6	PDIP-8 SOIC-8 QFN/MLF-20 TSSOP-8	2 / 4 / 8	128 / 256 / 512	128 / 256 / 512	-	1	1	-	2	-	1 x 2	4 ch / 10 b	20
ATtiny24 / ATtiny24a / ATtiny44 / ATtiny44a / ATtiny84 / ATtiny84a	2005/12 2008/12(a)	avr25	12	PDIP-14 SOIC-14 QFN/MLF/VQFN-20 UFBGA-15	2 / 4 / 8	128 / 256 / 512	128 / 256 / 512	-	1	-	-	1	1	2 x 2	8ch / 10 b	20
ATtiny441 / ATtiny841	2012/09	avr25	12	SOIC-14 QFN/MLF/VQFN-20	4 / 8	256 / 512	256 / 512	slave	-	1	2	1	2	2 x 2	17 ch 10 b	16
ATtiny261 / ATtiny261a / ATtiny461 / ATtiny461a / ATtiny861 / ATtiny861a	2006/10 2009/10(a)	avr25	16	PDIP-20 SOIC-20 TSSOP-20 MLF-32	2 / 4 / 8	128 / 256 / 512	128 / 256 / 512	-	1	-	-	1	1	1 x 3	11ch / 10 b	20
ATtiny43u	2009/02	avr25	16	SOIC-20 MLF/VQFN-20	4	256	64	-	1	-	-	2	-	2 x 2	4 ch / 10 b	8
ATtiny87 / ATtiny167	2010/08	avr25 / avr35	16	SOIC-20 VQFN-32 TSSOP-20	8 / 16	512	512	-	1	1	1	1	1	1 x 1	11 ch / 10 b	16
ATtiny2313 / ATtiny2313a / ATtiny4313	2003/09 / 2009/11(a)	avr25	18	PDIP-20 SOIC-20 MLF/VQFN-20	2 / 4	128 / 256	128 / 256	-	1	1	1	1	1	1 x 4	-	20
ATtiny48 / ATtiny88	2008/06	avr25	24 / 28	PDIP-28 QFN-28 TQFP-32 QFN-32 UFBGA-32	4 / 8	256 / 512	64	1	-	1	-	1	1	1 x 2	6/8 ch 10 b	12
ATtiny4 / ATtiny5 / ATtiny9 / ATtiny10	2009/04	avrtiny10	4	sot-23 udfn	0.5 / 1	32	-	-	-	-	-	-	1	1 x 2	4 ch / 8 b (ATtiny5/10 only)	12
ATtiny20	2010/03	avrtiny10	12	SOIC-14 UFBGA-15 VQFN-20	2	128	-	slave	-	1	-	1	1	2 x 2	8 ch / 10 b	12
ATtiny40	2010/08	avrtiny10	18	SOIC/TSSOP-20 VQFN/MLF-20	4	256	-	slave	-	1	-	1	1	1 x 2	12 ch / 10 b	12
ATtiny828	2012/08	avr25	28	TQFP-32 VQFN/MLF-32	8	512	256	slave	-	1	1	1	1	2 x 2	28 ch 10 b	20
ATtiny1634	2011/11	avr35	18	MLF(WFQN)-20 SOIC (300 mil)-20	16	1024	256	slave	1	-	2	1	1	2 x 2	12 ch / 10 b	12

Abbreviations

TWI: Many of Atmels microcontrollers contain built-in support for interfacing to a two-wire bus, called Two-Wire Interface. This is essentially the same thing as the I²C interface by Philips, but that term is avoided in Atmel's documentation due to trademark issues.
USI: Universal Serial Interface (not to be confused with USB). The USI is a multi-purpose hardware communication module. With appropriate software support, it that can be used to implement an SPI,^[3] I²C^[4]^[5] or UART^[6] interface.

References

↑ http://www.atmel.com/products/microcontrollers/avr/tinyavr.aspx
↑ http://www.nongnu.org/avr-libc/user-manual/using_tools.html
↑ "AVR319: Using the USI module for SPI communication" (PDF). Atmel. 2004. Retrieved 10 June 2014.
↑ "Atmel AVR310: Using the USI Module as a I²C Master" (PDF). Atmel. 2013. Retrieved 10 June 2014.
↑ "AVR312: Using the USI module as a I²C slave" (PDF). Atmel. 2005. Retrieved 10 June 2014.
↑ "AVR307: Half Duplex UART Using the USI Module" (PDF). Atmel. 2003. Retrieved 10 June 2014.

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