This is a document about a high-performance, low-power AVR® 8-bit microcontroller. The microcontroller features an advanced RISC architecture with powerful instructions and single clock cycle execution. It also has high endurance non-volatile memory, multiple timers/counters, an analog comparator, and other peripheral features.
The ATtiny24A and ATtiny44A are low‑power CMOS 8‑bit microcontrollers based on the AVR enhanced RISC architecture. They offer up to 1 MIPS per MHz, 2 KB/4 KB flash, 128/256 B EEPROM, 128/256 B SRAM, a 10‑bit ADC, multiple timers, and a range of low‑power modes.
The document includes detailed pin‑out diagrams, pin descriptions, a complete register summary, and information on packages (QFN, SOIC, PDIP, UFBGA). Additional resources such as driver libraries, application notes, and code examples are listed, with contact information for Atmel support worldwide.
| Operating Voltage | 1.8 V – 5.5 V |
|---|---|
| Speed Grade | 0‑4 MHz @1.8‑5.5 V, 0‑10 MHz @2.7‑5.5 V, 0‑20 MHz @4.5‑5.5 V |
| Flash Memory | 2 KB or 4 KB (depending on variant) |
| EEPROM | 128 B or 256 B |
| SRAM | 128 B or 256 B |
| ADC Resolution | 10‑bit, 8 single‑ended channels, 12 differential pairs |
| I/O Pins | 12 programmable I/O lines |
| Package Options | 20‑Pin QFN/MLF/VQFN, 14‑Pin SOIC, 14‑Pin PDIP, 15‑ball UFBGA |
| Active Mode Current | 210 pA at 1.8 V, 1 MHz |
| Idle Mode Current | 33 µA at 1.8 V, 1 MHz |
| Power‑Down Mode Current | 0.1 µA at 1.8 V, 25 °C |
| Data Retention | 20 years at 85 °C / 100 years at 25 °C |
The device operates from 1.8 V up to 5.5 V.
It provides either 2 KB or 4 KB of in‑system programmable flash, depending on the variant.
The microcontroller offers twelve programmable I/O lines.
Active mode draws about 210 pA at 1.8 V and 1 MHz.