Features
• High-performance and Low-power AVR® 8-bit RISC Architecture
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– 118 Powerful Instructions – Most Single Cycle Execution
– 32 x 8 General Purpose Working Registers
– Up to 8 MIPS Throughput at 8 MHz
Data and Non-volatile Program Memory
– 4K Bytes of In-System Programmable Flash
Endurance 1,000 Write/Erase Cycles
– 128 Bytes of SRAM
– 256 Bytes of In-System Programmable EEPROM
Endurance: 100,000 Write/Erase Cycles
– Programming Lock for Flash Program and EEPROM Data Security
Peripheral Features
– One 8-bit Timer/Counter with Separate Prescaler
– Expanded 16-bit Timer/Counter with Separate Prescaler,
Compare, Capture Modes and 8-, 9-, or 10-bit PWM
– On-chip Analog Comparator
– Programmable Watchdog Timer with Separate On-chip Oscillator
– Programmable UART
– 6-channel, 10-bit ADC
– Master/Slave SPI Serial Interface
Special Microcontroller Features
– Brown-out Reset Circuit
– Enhanced Power-on Reset Circuit
– Low-power Idle and Power-down Modes
Power Consumption at 4 MHz, 3V, 25°C
– Active: 3.4 mA
– Idle Mode: 1.4 mA
– Power-down Mode: <1 µA
I/O and Packages
– 20 Programmable I/O Lines
– 28-lead PDIP and 32-lead TQFP
Operating Voltage
– 2.7V - 6.0V for the AT90LS4433
– 4.0V - 6.0V for the AT90S4433
Speed Grades
– 0 - 4 MHz for the AT90LS4433
– 0 - 8 MHz for the AT90S4433
8-bit
Microcontroller
with 4K Bytes of
In-System
Programmable
Flash
AT90S4433
AT90LS4433
Not Recommend for
New Designs. Use
ATmega8.
Rev. 1042H–AVR–04/03
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