ATtiny microcontroller comparison chart

ATtiny (also known as TinyAVR) are a subfamily of the popular 8-bit AVR microcontrollers, which typically has fewer features, fewer I/O pins, and less memory than other AVR series chips. The first members of this family were released in 1999 by Atmel (later acquired by Microchip Technology in 2016).[1]

ATtiny2313 in 20-pin narrow dual in-line package (DIP-20N)

Features

ATtiny microcontrollers specifically excludes various common features, such as: USB peripheral, DMA controller, crypto engine, or an external memory bus.

The following table summarizes common features of the ATtiny microcontrollers, for easy comparison. This table is not meant to be an unabridged feature list.

Device (family)[2]	Max clock (MHz)	Flash (KiB)	SRAM (bytes)	EEPROM (bytes)	UART	I²C (TWI)	SPI	Timers 8/12/16 (bits)	PWM [lower-alpha 1]	ADC chans	GPIO pins	IC Packages	GCC arch ID [3][4]	Pgm Dbg	Refs
ATtiny11, ATtiny11L	6, 2	1	No	No	No	No	No	1 / 0 / 0	No	No	5	DIP-8N, SO200-8	avr1	HVSP	[5]
ATtiny12, ATtiny12L, ATtiny12V	8, 1.2	1	No	64	No	No	No	1 / 0 / 0	No	No	5	DIP-8N, SO200-8	avr1	ISP, HVSP	[5]
ATtiny15L	1.6	1	No	64	No	No	No	2 / 0 / 0	yes	4	6	DIP-8N, SO200-8	avr1	ISP, HVSP	[6]
ATtiny28L, ATtiny28V	4, 1.2	2	No	No	No	No	No	1 / 0 / 0	1 x 1	No	11	DIP-28N, TQFP-32, QFN-32	avr1	HVPP	[7]
ATtiny22, ATtiny22L	8, 4	2	128	128	No	No	No	1 / 0 / 0	No	No	5	DIP-8N, SO200-8	avr2	ISP, HVSP	[8]
ATtiny26, ATtiny26L	16, 8	2	128	128	USI*	master, slave*	master, slave*	2 / 0 / 0	1 x 2	11	16	DIP-20N, SO300-20, QFN-32	avr2	ISP, HVPP	[9]
ATtiny13, ATtiny13V, ATtiny13A	20, 10	1	64	64	No	No	No	1 / 0 / 0	1 x 2	4	6	DIP-8N, SO150-8, SO209-8, VQFN-10, WQFN-20	avr2.5	ISP, dW, HVSP	[10] [11] [12]
ATtiny24, ATtiny24V, ATtiny24A, ATtiny44, ATtiny44V, ATtiny44A, ATtiny84, ATtiny84V, ATtiny84A	20, 10	2, 4, 8	128, 256, 512	128, 256, 512	USI*	master, slave*	master, slave*	1 / 0 / 1	2 x 2	8	12	DIP-14N, SO150-14, QFN-20, VQFN-20, UFBGA-15	avr2.5	ISP, dW, HVSP	[13] [14] [15] [16] [17] [18]
ATtiny25, ATtiny25V, ATtiny45, ATtiny45V, ATtiny85, ATtiny85V	20, 10	2, 4, 8	128, 256, 512	128, 256, 512	USI*	master, slave*	master, slave*	2 / 0 / 0	2 x 2 [lower-alpha 2]	4	6	DIP-8N, SO208-8, TSSOP-8, QFN-20	avr2.5	ISP, dW, HVSP	[19] [20] [21]
ATtiny43U	8	4	256	64	USI*	master, slave*	master, slave*	2 / 0 / 0	2 x 2	4	16	SO300-20, QFN-20	avr2.5	ISP, dW, HVPP	[22]
ATtiny48, ATtiny88	12	4, 8	256, 512	64	No	master, slave	master, slave	1 / 0 / 1	1 x 2	6 / 8	24, 28	DIP-28N, QFN-28, TQFP-32, QFN-32, UFBGA-32	avr2.5	ISP, dW, HVPP	[23] [24]
ATtiny87, ATtiny167	16	8, 16	512	512	USI*, UART*	No	master, slave	1 / 0 / 1	1 x 1	11	16	SO300-20, TSSOP-20, VQFN-32	avr2.5, avr35	ISP, dW, HVPP	[25] [26]
ATtiny261, ATtiny261A, ATtiny461, ATtiny461A, ATtiny861, ATtiny861A	20	2, 4, 8	128, 256, 512	128, 256, 512	USI*	master, slave*	master, slave*	1 / 0 / 1	1 x 3	11	16	DIP-20N, SO300-20, TSSOP-20, QFN-32	avr2.5	ISP, dW, HVPP	[27] [28] [29] [30] [31]
ATtiny441, ATtiny841	16	4, 8	256, 512	256, 512	2 USART*	slave	master, slave	1 / 0 / 2	2 x 2	12	12	SO150-14, QFN-20, VQFN-20	avr2.5	ISP, dW, HVSP	[32] [33]
ATtiny828	20	8	512	256	USART*	slave	master, slave	1 / 0 / 1	2 x 2	28	28	TQFP-32, QFN-32	avr2.5	ISP, dW, HVPP	[34]
ATtiny1634	12	16	1024	256	USI*, 2 USART*	slave	master*	1 / 0 / 1	2 x 2	12	18	SO300-20, QFN-20	avr35	ISP, dW, HVPP	[35]
ATtiny2313, ATtiny2313V, ATtiny2313A, ATtiny4313	20	2, 4	128, 256	128, 256	USI*, USART*	master, slave*	master, slave*	1 / 0 / 1	2 x 2	No	18	DIP-20N, SO300-20, VQFN-20	avr2.5	ISP, dW, HVPP	[36] [37] [38] [39]
ATtiny4, ATtiny5, ATtiny9, ATtiny10	12	0.5 / 1	32	No	No	No	No	0 / 0 / 1	1 x 2	4 [lower-alpha 3]	4	SOT23-6, UDFN-8	avrtiny10	TPI	[40] [41] [42] [43]
ATtiny20	12	2	128	No	No	slave	master, slave	1 / 0 / 1	2 x 2	8	12	SO150-14, TSSOP-14, VQFN-20, UFBGA-15, WLCSP-12	avrtiny10	TPI	[44]
ATtiny40	12	4	256	No	No	slave	master, slave	1 / 0 / 1	1 x 2	12	18	SO300-20, TSSOP-20, VQFN-20	avrtiny10	TPI	[45]
ATtiny102(F)	12	1	32	No	USART*	No	master*	0 / 0 / 1	yes	5	6	SO150-8, UDFN-8	?	TPI	[46]
ATtiny104(F)	12	1	32	No	USART*	No	master*	0 / 0 / 1	yes	9	12	SO150-14	?	TPI	[47]
ATtiny202, ATtiny402 (0-series)	20	2, 4	128, 256	64, 128	USART*	master, slave	master, slave	0 / 0 / 2 / R	yes	6	6	SO150-8	avrxmega3	UPDI	[48] [49]
ATtiny204, ATtiny404, ATtiny804, ATtiny1604 (0-series)	20	2, 4, 8, 16	128, 256, 512, 1024	64, 128, 256	USART*	master, slave	master, slave	0 / 0 / 2 / R	yes	10	12	SO150-14	avrxmega3	UPDI	[50] [51] [52] [53]
ATtiny406, ATtiny806, ATtiny1606 (0-series)	20	4, 8, 16	256, 512, 1024	128, 256	USART*	master, slave	master, slave	0 / 0 / 2 / R	yes	12	18	SO300-20, VQFN-20	avrxmega3	UPDI	[54] [55] [56]
ATtiny807, ATtiny1607 (0-series)	20	8, 16	512, 1024	128, 256	USART*	master, slave	master, slave	0 / 0 / 2 / R	yes	12	22	VQFN-24	avrxmega3	UPDI	[57] [58]
ATtiny212, ATtiny412 (1-series)	20	2, 4	128, 256	64, 128	USART*	master, slave	master, slave	0 / 1 / 2 / R	yes	6	6	SO150-8	avrxmega3	UPDI	[59] [60]
ATtiny214, ATtiny414, ATtiny814, ATtiny1614 (1-series)	20	2, 4, 8, 16	128, 256, 512, 2048	64, 128, 256	USART*	master, slave	master, slave	0 / 1 / 2 / R	yes	10	12	SO150-14	avrxmega3	UPDI	[61] [62] [63] [64]
ATtiny416, ATtiny816, ATtiny1616, ATtiny3216 (1-series)	20	4, 8, 16, 32	256, 512, 2048	128, 256	USART*	master, slave	master, slave	0 / 1 / 2or3 / R	yes	12	18	SO300-20, QFN-20, VQFN-20	avrxmega3	UPDI	[65] [66] [67] [68]
ATtiny417, ATtiny817, ATtiny1617, ATtiny3217 (1-series)	20	4, 8, 16, 32	256, 512, 2048	128, 256	USART*	master, slave	master, slave	0 / 1 / 2 / R	yes	12	22	VQFN-24, QFN-24	avrxmega3	UPDI	[69] [70] [71] [72]
ATtiny1624 (2-series)	20	16	2048	256	2 USART*	yes	yes	0 / 0 / 3 / R	yes	?	?	SO-14	?	UPDI	[73]
ATtiny1626 (2-series)	20	16	2048	256	2 USART*	yes	yes	0 / 0 / 3 / R	yes	?	?	SO-20, VQFN-20	?	UPDI	[74]
ATtiny1627 (2-series)	20	16	2048	256	2 USART*	yes	yes	0 / 0 / 3 / R	yes	?	?	VQFN-24	?	UPDI	[75]
Device (family)	Max clock (MHz)	Flash (KiB)	SRAM (bytes)	EEPROM (bytes)	UART	I²C (TWI)	SPI	Timers 8/12/16/R (bits)	PWM	ADC chans	GPIO pins	IC Packages	GCC arch ID	Pgm Dbg	Refs

Notes

1. timers x waveform generators
2. 4 pins are usable, but only 3 unique generators can be attached. The 4th pin would be the inverse of OC1B on the 3rd pin.
3. ADC only on ATtiny5/10, and channels are 8 bits instead of 10

• Package column - the number after the dash is the number of pins on the package. DIP packages in this table are 0.3 inches (7.62 mm) row-to-row. SOwww means SOIC package with a case width of 'www' in thousandth of an inch. Though some package types are known by more than one name, a common name was chosen to make it easier to compare packages.
• UART/I²C/SPI columns - green cell means a dedicated peripheral, yellow cell means a multi-feature peripheral that is chosen by setting configuration bits. Most USART peripherals support a minimum choice between UART or SPI, where as some might support additional choices, such as LIN, IrDA, RS-485.
• Timers column - recent families add a 12-bit timer, plus a 16-bit Real Time Counter (RTC) that is driven by a 32.768KHz clock (feature designated with 'R' in the table).
• ADC chans column - the total number of analog channels that are multiplex into the ADC input. Most parts have one ADC, a few have two ADC.
• Pgm/Dbg column - flash programming and debugging protocols: HVPP means High Voltage Parallel Programming 12V protocol, HVSP means High Voltage Serial Programming 12V protocol, ISP means In-System Programmable protocol, uses SPI to program the internal flash. TPI is Tiny Programming Interface. dW means debugWIRE protocol. UPDI means Unified Program and Debug Interface protocol (newest).[76]

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 can be used to implement an SPI,[77] I²C[78][79] or UART[80] interface. USART peripherals have more features than USI peripherals.

Timeline

The following table lists each ATtiny microcontroller by the first release date of each datasheet.

Year	Device (family)
1999	ATtiny11, ATtiny11L, ATtiny12, ATtiny12L, ATtiny12V, ATtiny22, ATtiny22L
2002	ATtiny15L, ATtiny26, ATtiny26L, ATtiny28L, ATtiny28V
2003	ATtiny13, ATtiny13V, ATtiny2313, ATtiny2313V, ATtiny4313
2005	ATtiny24, ATtiny24V, ATtiny25, ATtiny25V, ATtiny44, ATtiny44V, ATtiny45, ATtiny45V, ATtiny84, ATtiny84V, ATtiny85, ATtiny85V
2006	ATtiny261, ATtiny461, ATtiny861
2008	ATtiny13A, ATtiny24A, ATtiny44A, ATtiny48, ATtiny84A, ATtiny88
2009	ATtiny4, ATtiny5, ATtiny9, ATtiny10, ATtiny43U, ATtiny261A, ATtiny461A, ATtiny861A, ATtiny2313A
2010	ATtiny20, ATtiny40, ATtiny87, ATtiny167
2011	ATtiny1634
2012	ATtiny441, ATtiny841, ATtiny828
2016	ATtiny102(F), ATtiny104(F), ATtiny417, ATtiny817
2017	ATtiny212, ATtiny412, ATtiny214, ATtiny414, ATtiny814, ATtiny416, ATtiny816
2018	ATtiny202, ATtiny402, ATtiny204, ATtiny404, ATtiny804, ATtiny1604, ATtiny406, ATtiny806, ATtiny1606, ATtiny807, ATtiny1607, ATtiny1614, ATtiny1616, ATtiny3216, ATtiny1617, ATtiny3217

Development boards

The following are ATtiny development boards sold by Microchip Technology:

• ATtiny104 Xplained Nano
• ATtiny416 Xplained Nano
• ATtiny817 AVR Parrot
• ATtiny817 Xplained Mini
• ATtiny817 Xplained Pro
• ATtiny3217 Xplained Pro

See also

• AVR microcontrollers
• Atmel AVR instruction set
• In-system programming
• Arduino

References

1. "Atmel Product Guide September 1999" (PDF). Atmel. September 1999. Archived (PDF) from the original on October 6, 2018. Retrieved October 6, 2018.
2. 8-bit AVR microcontrollers; Microchip.com
3. AVR compiler options; gcc.gnu.org
4. Machine-specific compiler options for the AVR; nongnu.org
5. "ATtiny11/ATtiny12 datasheet" (PDF). Microchip Technology. Retrieved July 9, 2018.
6. "ATtiny15L datasheet" (PDF). Microchip Technology. Retrieved July 9, 2018.
7. "ATtiny28 webpage". Microchip Technology. Retrieved July 7, 2018.
8. "ATtiny22 datasheet" (PDF). Microchip Technology. Retrieved July 16, 2018.
9. "ATtiny26 webpage". Microchip Technology. Retrieved July 7, 2018.
10. "ATtiny13 webpage". Microchip Technology. Retrieved July 7, 2018.
11. "ATtiny13A webpage". Microchip Technology. Retrieved July 7, 2018.
12. "AppNote AVR520 - Migrating from ATtiny13 to ATtiny13A" (PDF). Microchip Technology. Retrieved July 7, 2018.
13. "ATtiny24 webpage". Microchip Technology. Retrieved July 7, 2018.
14. "ATtiny44 webpage". Microchip Technology. Retrieved July 7, 2018.
15. "ATtiny84 webpage". Microchip Technology. Retrieved July 7, 2018.
16. "ATtiny24A webpage". Microchip Technology. Retrieved July 7, 2018.
17. "ATtiny44A webpage". Microchip Technology. Retrieved July 7, 2018.
18. "ATtiny84A webpage". Microchip Technology. Retrieved July 7, 2018.
19. "ATtiny25 webpage". Microchip Technology. Retrieved July 7, 2018.
20. "ATtiny45 webpage". Microchip Technology. Retrieved July 7, 2018.
21. "ATtiny85 webpage". Microchip Technology. Retrieved July 7, 2018.
22. "ATtiny43U webpage". Microchip Technology. Retrieved July 7, 2018.
23. "ATtiny48 webpage". Microchip Technology. Retrieved July 9, 2018.
24. "ATtiny88 webpage". Microchip Technology. Retrieved July 9, 2018.
25. "ATtiny87 webpage". Microchip Technology. Retrieved July 9, 2018.
26. "ATtiny167 webpage". Microchip Technology. Retrieved July 9, 2018.
27. "ATtiny261A webpage". Microchip Technology. Retrieved July 9, 2018.
28. "ATtiny461 webpage". Microchip Technology. Retrieved July 9, 2018.
29. "ATtiny461A webpage". Microchip Technology. Retrieved July 9, 2018.
30. "ATtiny861 webpage". Microchip Technology. Retrieved July 9, 2018.
31. "ATtiny861A webpage". Microchip Technology. Retrieved July 9, 2018.
32. "ATtiny441 webpage". Microchip Technology. Retrieved July 9, 2018.
33. "ATtiny841 webpage". Microchip Technology. Retrieved July 9, 2018.
34. "ATtiny828 webpage". Microchip Technology. Retrieved July 9, 2018.
35. "ATtiny1634 webpage". Microchip Technology. Retrieved July 9, 2018.
36. "ATtiny2313 webpage". Microchip Technology. Retrieved July 7, 2018.
37. "ATtiny2313A webpage". Microchip Technology. Retrieved July 7, 2018.
38. "ATtiny4313 webpage". Microchip Technology. Retrieved July 7, 2018.
39. "AppNote AVR533 - Migrating from ATtiny2313 to ATtiny2313A" (PDF). Microchip Technology. Retrieved July 7, 2018.
40. "ATtiny4 webpage". Microchip Technology. Retrieved July 7, 2018.
41. "ATtiny5 webpage". Microchip Technology. Retrieved July 7, 2018.
42. "ATtiny9 webpage". Microchip Technology. Retrieved July 7, 2018.
43. "ATtiny10 webpage". Microchip Technology. Retrieved July 7, 2018.
44. "ATtiny20 webpage". Microchip Technology. Retrieved July 7, 2018.
45. "ATtiny40 webpage". Microchip Technology. Retrieved July 7, 2018.
46. "ATtiny102 webpage". Microchip Technology. Retrieved July 7, 2018.
47. "ATtiny104 webpage". Microchip Technology. Retrieved July 7, 2018.
48. "ATtiny202 webpage". Microchip Technology. Retrieved July 7, 2018.
49. "ATtiny402 webpage". Microchip Technology. Retrieved July 7, 2018.
50. "ATtiny204 webpage". Microchip Technology. Retrieved July 7, 2018.
51. "ATtiny404 webpage". Microchip Technology. Retrieved July 7, 2018.
52. "ATtiny804 webpage". Microchip Technology. Retrieved July 7, 2018.
53. "ATtiny1604 webpage". Microchip Technology. Retrieved July 7, 2018.
54. "ATtiny406 webpage". Microchip Technology. Retrieved July 7, 2018.
55. "ATtiny806 webpage". Microchip Technology. Retrieved July 7, 2018.
56. "ATtiny1606 webpage". Microchip Technology. Retrieved July 7, 2018.
57. "ATtiny807 webpage". Microchip Technology. Retrieved July 7, 2018.
58. "ATtiny1607 webpage". Microchip Technology. Retrieved July 7, 2018.
59. "ATtiny212 webpage". Microchip Technology. Retrieved July 7, 2018.
60. "ATtiny412 webpage". Microchip Technology. Retrieved July 7, 2018.
61. "ATtiny214 webpage". Microchip Technology. Retrieved July 7, 2018.
62. "ATtiny414 webpage". Microchip Technology. Retrieved July 7, 2018.
63. "ATtiny814 webpage". Microchip Technology. Retrieved July 7, 2018.
64. "ATtiny1614 webpage". Microchip Technology. Retrieved July 7, 2018.
65. "ATtiny416 webpage". Microchip Technology. Retrieved July 7, 2018.
66. "ATtiny816 webpage". Microchip Technology. Retrieved July 7, 2018.
67. "ATtiny1616 webpage". Microchip Technology. Retrieved July 7, 2018.
68. "ATtiny3216 webpage". Microchip Technology. Retrieved July 7, 2018.
69. "ATtiny417 webpage". Microchip Technology. Retrieved July 7, 2018.
70. "ATtiny817 webpage". Microchip Technology. Retrieved July 7, 2018.
71. "ATtiny1617 webpage". Microchip Technology. Retrieved July 7, 2018.
72. "ATtiny3217 webpage". Microchip Technology. Retrieved July 7, 2018.
73. ATtiny1624; Microchip.
74. ATtiny1626; Microchip.
75. ATtiny1627; Microchip.
76. Atmel Studio Release Notes; Microchip.com
77. "AVR319: Using the USI module for SPI communication" (PDF). Atmel. 2004. Retrieved 10 June 2014.
78. "Atmel AVR310: Using the USI Module as a I²C Master" (PDF). Atmel. 2013. Retrieved 10 June 2014.
79. "AVR312: Using the USI module as a I²C slave" (PDF). Atmel. 2005. Retrieved 10 June 2014.
80. "AVR307: Half Duplex UART Using the USI Module" (PDF). Atmel. 2003. Retrieved 10 June 2014.

Further reading

ATtiny

• tinyAVR Microcontroller Projects for the Evil Genius; 1st Ed; Dhananjay Gadre, Nehul Malhotra; McGraw-Hill/TAB; 272 pages; 2011; ISBN 978-0071744546.

AVR

• AVR Programming: Learning to Write Software for Hardware; 1st Ed; Elliot Williams; Maker Media; 474 pages; 2014; ISBN 978-1449355784
• Some Assembly Required: Assembly Language Programming with the AVR Microcontroller; 1st Ed; Timothy Margush; CRC Press; 643 pages; 2011; ISBN 978-1439820643
• AVR Microcontroller and Embedded Systems: Using Assembly and C; 1st Ed; Muhammad Ali Mazidi, Sarmad Naimi, Sepehr Naimi; Pearson; 792 pages; 2010; ISBN 978-0138003319.

External links

• Microchip 8-bit AVR MCU product webpage - Microchip
• Microchip 8-bit AVR MCU product selector (PDF) - Microchip
• Atmel tinyAVR fast and code efficient flyer (PDF) - Microchip
• All tinyAVR parts in a spreadsheet - EDN Magazine, September 8, 2014.
• ATtiny44/84 and ATtiny45/85 Pinout Diagrams