ATtiny (also known as TinyAVR) is 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]
ATtiny microcontrollers specifically exclude 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) | USART (UART) | I²C (TWI) | SPI | Timers 16/12/8 (bits) | ADC pins | GPIO pins | IC Packages | GCC arch ID [3] | Pgm Dbg | Refs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ATtiny11, ATtiny11L | 6, 2 | 1 | No | No | No | No | No | 0 / 0 / 1 | No | 5 | DIP-8N, SO200-8 | avr1 | HVSP | [4] |
| ATtiny12, ATtiny12L, ATtiny12V | 8, 1.2 | 1 | No | 64 | No | No | No | 0 / 0 / 1 | No | 5 | DIP-8N,SO200-8 | avr1 | ISP, HVSP | [4] |
| ATtiny15L | 1.6 | 1 | No | 64 | No | No | No | 0 / 0 / 2 | 4 | 6 | DIP-8N,SO200-8 | avr1 | ISP, HVSP | [5] |
| ATtiny28L, ATtiny28V | 4, 1.2 | 2 | No | No | No | No | No | 0 / 0 / 1 | No | 11 | DIP-28N,TQFP-32,QFN-32 | avr1 | HVPP | [6] |
| ATtiny22, ATtiny22L | 8, 4 | 2 | 128 | 128 | No | No | No | 0 / 0 / 1 | No | 5 | DIP-8N,SO200-8 | avr2 | ISP, HVSP | [7] |
| ATtiny26, ATtiny26L | 16, 8 | 2 | 128 | 128 | USI* | master, slave* | master, slave* | 0 / 0 / 2 | 11 | 16 | DIP-20N,SO300-20,QFN-32 | avr2 | ISP, HVPP | [8] |
| ATtiny13, ATtiny13V, ATtiny13A | 20, 10 | 1 | 64 | 64 | No | No | No | 0 / 0 / 1 | 4 | 6 | DIP-8N,SO150-8,SO209-8, VQFN-10,WQFN-20 | avr25 | ISP, dW, HVSP | [9] [10] [11] |
| 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 | 8 | 12 | DIP-14N,SO150-14,QFN-20,VQFN-20,UFBGA-15 | avr25 | ISP, dW, HVSP | [12] [13] [14] [15] [16] [17] |
| ATtiny25, ATtiny25V, ATtiny45, ATtiny45V, ATtiny85, ATtiny85V | 20, 10 | 2, 4, 8 | 128, 256, 512 | 128, 256, 512 | USI* | master, slave* | master, slave* | 0 / 0 / 2 [lower-alpha 1] | 4 | 6 | DIP-8N,SO208-8,TSSOP-8,QFN-20 | avr25 | ISP, dW, HVSP | [18] [19] [20] |
| ATtiny43U [lower-alpha 2] | 8 | 4 | 256 | 64 | USI* | master, slave* | master, slave* | 0 / 0 / 2 | 4 | 16 | SO300-20,QFN-20 | avr25 | ISP, dW, HVPP | [21] |
| ATtiny48, ATtiny88 | 12 | 4, 8 | 256, 512 | 64 | No | master, slave | master, slave | 1 / 0 / 1 | 6 | 24 | DIP-28N,QFN-28 | avr25 | ISP, dW, HVPP | [22] [23] |
| No | master, slave | master, slave | 1 / 0 / 1 | 8 | 28 | TQFP-32,QFN-32,UFBGA-32 | ||||||||
| ATtiny87, ATtiny167 | 16 | 8, 16 | 512 | 512 | USI*, UART* | No | master, slave | 1 / 0 / 1 | 11 | 16 | SO300-20,TSSOP-20,VQFN-32 | avr25, avr35 | ISP, dW, HVPP | [24] [25] |
| ATtiny261, ATtiny261A, ATtiny461, ATtiny461A, ATtiny861, ATtiny861A | 20 | 2, 4, 8 | 128, 256, 512 | 128, 256, 512 | USI* | master, slave* | master, slave* | 1 / 0 / 1 [lower-alpha 3] | 11 | 16 | DIP-20N,SO300-20,TSSOP-20,QFN-32 | avr25 | ISP, dW, HVPP | [26] [27] [28] [29] [30] |
| ATtiny441, ATtiny841 | 16 | 4, 8 | 256, 512 | 256, 512 | 2 USART* | slave | master, slave | 2 / 0 / 1 | 12 | 12 | SO150-14,QFN-20,VQFN-20 | avr25 | ISP, dW, HVSP | [31] [32] |
| ATtiny828 | 20 | 8 | 512 | 256 | USART* | slave | master, slave | 1 / 0 / 1 | 28 | 28 | TQFP-32,QFN-32 | avr25 | ISP, dW, HVPP | [33] |
| ATtiny1634 | 12 | 16 | 1024 | 256 | USI*, 2 USART* | slave | master* | 1 / 0 / 1 | 12 | 18 | SO300-20,QFN-20 | avr35 | ISP, dW, HVPP | [34] |
| ATtiny2313, ATtiny2313V, ATtiny2313A, ATtiny4313 | 20 | 2, 4 | 128, 256 | 128, 256 | USI*, USART* | master, slave* | master, slave* | 1 / 0 / 1 | No | 18 | DIP-20N,SO300-20,VQFN-20 | avr25 | ISP, dW, HVPP | [35] [36] [37] [38] |
| ATtiny4, ATtiny5, ATtiny9, ATtiny10 | 12 | 0.5 / 1 | 32 | No | No | No | No | 1 / 0 / 0 | 4 [lower-alpha 4] | 4 | SOT23-6,UDFN-8 | avrtiny | TPI | [39] [40] [41] [42] |
| ATtiny20 | 12 | 2 | 128 | No | No | slave | master, slave | 1 / 0 / 1 | 8 | 12 | SO150-14, TSSOP-14,VQFN-20, UFBGA-15, WLCSP-12 | avrtiny | TPI | [43] |
| ATtiny40 | 12 | 4 | 256 | No | No | slave | master, slave | 1 / 0 / 1 | 12 | 18 | SO300-20,TSSOP-20,VQFN-20 | avrtiny | TPI | [44] |
| ATtiny102(F) | 12 | 1 | 32 | No | USART* | No | master* | 1 / 0 / 0 | 5 | 6 | SO150-8,UDFN-8 | avrtiny | TPI | [45] |
| ATtiny104(F) | 12 | 1 | 32 | No | USART* | No | master* | 1 / 0 / 0 | 9 | 12 | SO150-14 | avrtiny | TPI | [46] |
| ATtiny202, ATtiny402 (0-series) | 20 | 2, 4 | 128, 256 | 64, 128 | USART* | master, slave | master, slave | 2 / 0 / 0 / RTT | 6 | 6 | SO150-8 | avrxmega3 | UPDI | [47] [48] |
| ATtiny204, ATtiny404, ATtiny804, ATtiny1604 (0-series) | 20 | 2, 4, 8, 16 | 128, 256, 512, 1024 | 64, 128, 256 | USART* | master, slave | master, slave | 2 / 0 / 0 / RTT | 10 | 12 | SO150-14 | avrxmega3 | UPDI | [49] [50] [51] [52] |
| ATtiny406, ATtiny806, ATtiny1606 (0-series) | 20 | 4, 8, 16 | 256, 512, 1024 | 128, 256 | USART* | master, slave | master, slave | 2 / 0 / 0 / RTT | 12 | 18 | SO300-20,VQFN-20 | avrxmega3 | UPDI | [53] [54] [55] |
| ATtiny807, ATtiny1607 (0-series) | 20 | 8, 16 | 512, 1024 | 128, 256 | USART* | master, slave | master, slave | 2 / 0 / 0 / RTT | 12 | 22 | VQFN-24 | avrxmega3 | UPDI | [56] [57] |
| ATtiny212, ATtiny412 (1-series) | 20 | 2, 4 | 128, 256 | 64, 128 | USART* | master, slave | master, slave | 2 / 1 / 0 / RTT | 6 | 6 | SO150-8 | avrxmega3 | UPDI | [58] [59] |
| ATtiny214, ATtiny414, ATtiny814, ATtiny1614 (1-series) | 20 | 2, 4, 8, 16 | 128, 256, 512, 2048 | 64, 128, 256 | USART* | master, slave | master, slave | 2 / 1 / 0 / RTT | 10 | 12 | SO150-14 | avrxmega3 | UPDI | [60] [61] [62] [63] |
| ATtiny416, ATtiny816, ATtiny1616, ATtiny3216 (1-series) | 20 | 4, 8, 16, 32 | 256, 512, 2048 | 128, 256 | USART* | master, slave | master, slave | 2or3 / 1 / 0 / RTT | 12 | 18 | SO300-20,QFN-20,VQFN-20 | avrxmega3 | UPDI | [64] [65] [66] [67] |
| ATtiny417, ATtiny817, ATtiny1617, ATtiny3217 (1-series) | 20 | 4, 8, 16, 32 | 256, 512, 2048 | 128, 256 | USART* | master, slave | master, slave | 2 / 1 / 0 / RTT | 12 | 22 | VQFN-24,QFN-24 | avrxmega3 | UPDI | [68] [69] [70] [71] |
| ATtiny424, ATtiny824, ATtiny1624, ATtiny3224 (2-series) | 20 | 4, 8, 16, 32 | 512, 1024, 2048, 3072 | 128, 128, 256, 256 | 2 USART* | yes | yes | 3 / 0 / 0 / RTT | 9 | 12 | SO-14,TSSOP-14 | avrxmega3 | UPDI | [72] [73] |
| ATtiny426, ATtiny826, ATtiny1626, ATtiny3226 (2-series) | 20 | 4, 8, 16, 32 | 512, 1024, 2048, 3072 | 128, 128, 256, 256 | 2 USART* | yes | yes | 3 / 0 / 0 / RTT | 15 | 18 | SO-20,SSTOP-20,VQFN-20 | avrxmega3 | UPDI | [74] [75] |
| ATtiny427, ATtiny827, ATtiny1627, ATtiny3227 (2-series) | 20 | 4, 8, 16, 32 | 512, 1024, 2048, 3072 | 128, 128, 256, 256 | 2 USART* | yes | yes | 3 / 0 / 0 / RTT | 15 | 22 | VQFN-24 | avrxmega3 | UPDI | [76] [77] |
| Device (family) | Max clock (MHz) | Flash (KiB) | SRAM (bytes) | EEPROM (bytes) | USART (UART) | I²C (TWI) | SPI | Timers 16/12/8/R (bits) | ADC pins | GPIO pins | IC Packages | GCC arch ID | Pgm Dbg | Refs |
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 |
| 2020 | ATtiny1624, ATtiny1626, ATtiny1627 |
| 2021 | ATtiny424, ATtiny824, ATtiny426, ATtiny826, ATtiny427, ATtiny827 |
The following are ATtiny development boards sold by Microchip Technology:
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