Description
The AT90S2333/4433 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the AT90S2333/4433 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features
• High-performance and Low-power AVR® 8-bit RISC Architecture
    – 118 Powerful Instructions - Most Single Cycle Execution
    – 32 x 8 General Purpose Working Registers
    – Up to 8 MIPS Throughput at 8 MHz
• Data and Nonvolatile Program Memory
    – 2K/4K Bytes of In-System Programmable Flash Endurance 1,000 Write/Erase Cycles
    – 128 Bytes of SRAM
    – 128/256 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
    – External and Internal Interrupt Sources
• Specifications
    – Low-power, High-speed CMOS Process Technology
    – Fully Static Operation
• 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-pin PDIP and 32-pin TQFP
• Operating Voltage
    – 2.7V - 6.0V (AT90LS2333 and AT90LS4433)
    – 4.0V - 6.0V (AT90S2333 and AT90S4433)
• Speed Grades
    – 0 - 4 MHz (AT90LS2333 and AT90LS4433)
    – 0 - 8 MHz (AT90S2333 and AT90S4433)