MICROCHIP AT89C4051-24PU 8 Bit MCU, 8051 Family AT89C2051 Series Microcontrollers, 8051, 24 MHz, 4 KB, 20 Pins, DIP

The AT89C4051-24PU is a 8-bit low-voltage high-performance CMOS Microcontroller with 4kB of flash programmable and erasable read-only memory. The device is manufactured using high-density non-volatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with flash on a monolithic chip, the AT89C4051 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89C4051 provides the following standard features, 4kB of flash, 128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five-vector, two-level interrupt architecture, a full duplex serial port, a precision analogue comparator, on-chip oscillator and clock circuitry. In addition, the AT89C4051 is designed with static logic for operation down to zero frequency and supports two software-selectable power saving modes.

• Compatible with MCS®-51 products
• 2kB reprogrammable flash memory
• 10,000 write/erase cycles endurance
• Two-level program memory lock
• 128 x 8-bit internal RAM
• 15 programmable I/O lines
• Two 16-bit timer/counters
• Six interrupt sources
• Programmable serial UART channel
• Direct LED drive outputs
• On-chip analogue comparator
• Low-power idle and power-down modes
• Brown-out detection
• Power-on reset (POR)