Features

– 120 Powerful Instructions – Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– 4K Bytes of In-System Programmable Program Memory Flash

– 64 Bytes of In-System Programmable EEPROM

– 256 Bytes of Internal SRAM

– Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM

– Data retention: 20 years at 85

°C/ 100 years at 85°C(1)

– Programming Lock for Software Security

– Two 8-Bit Timer/Counters with two PWM Channels, Each

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-Chip Analog Comparator

– 10-bit ADC

4 Single-Ended Channels

– Universal Serial Interface

–Boost Converter

– debugWIRE On-chip Debug System

– In-System Programmable via SPI Port

– External and Internal Interrupt Sources

– Pin Change Interrupt on 16 Pins

– Low Power Idle, ADC Noise Reduction and Power-Down Modes

– Enhanced Power-On Reset Circuit

– Programmable Brown-Out Detection Circuit

– Internal Calibrated Oscillator

– Temperature Sensor On Chip

– Available in 20-Pin SOIC and 20-Pin QFN/MLF

– 16 Programmable I/O Lines

– 0.7 – 1.8V (via On-Chip Boost Converter)

– 1.8 – 5.5V (Boost Converter Bypassed)

– Using On-Chip Boost Converter

0 – 4 MHz

– External Power Supply

0 – 4 MHz @ 1.8 – 5.5V

0 – 8 MHz @ 2.7 – 5.5V

– Active Mode, 1 MHz System Clock (Without Boost Converter)

400 µA @ 3V

– Power-Down Mode (Without Boost Converter)

150 nA @ 3V

Note:

1. See “Data Retention” on page 6 for details.

8-bit

Microcontroller

with 4K Bytes

In-System

Programmable

Flash and Boost

Converter

ATtiny43U

Preliminary

Summary

Rev. 8048BS–AVR–03/09