IS89C52

80C51 based architecture
8-Kbytes of on-chip Reprogrammable Flash Memory
256 x 8 RAM
Three 16-bit Timer/Counters
Full duplex serial channel
Boolean processor
Four 8-bit I/O ports, 32 I/O lines
Memory addressing capability
   -64K ROM and 64K RA
Program memory lock
   - Lock bits (3)
Power save modes:
   - Idle and power-dow
Eight interrupt sources
Most instructions execute in 0.3 _us
CMOS and TTL compatible
Maximum speed: 40 MHz @ Vcc = 5V
Industrial temperature available
Packages available:
   -  40-pin DIP
   - 44-pin PLCC
   - 44-pin PQFP

The ISSI IS89C52 is a high-performance microcontroller fabricated using high-density CMOS technology. The CMOS IS89C52 is functionally compatible with the industry standard 80C51 microcontrollers.

The IS89C52 is designed with 8-Kbytes of Flash memory, 258 x 8 RAM; 32 programmable I/O lines; a serial I/O port for either multiprocessor communications, I/O expansion or full duplex UART; three 16-bit timer/counters; an eight-source, two-priority-level, nested interrupt structure; and an on-chip oscillator and clock circuit. The IS89C52 can be expanded using standard TTL compatible memory.