87L51FB

The 87L51FA and 87L51FB Single-Chip 3.0V 8-Bit Microcontrollers are manufactured in an advanced CMOS process and are  derivatives of the 80C51 microcontroller family. The 87L51FA/B has the same instruction set as the 80C51.

87L51FA and 87L51FB provides architectural enhancements that make it applicable in a variety of applications for general control systems. The 87L51FA contains 8k × 8 memory and the 87L51FB contains 16K × 8 memory, a volatile 256 × 8 read/write data memory, four 8-bit I/O ports, three 16-bit timer/event counters, a Programmable Counter Array (PCA), a multi-source, two-priority-level, nested interrupt structure, an enhanced UART and on-chip oscillator and timing circuits. For systems that require extra capability, the 87L51FA/B can be expanded using standard 3.3V TTL compatible memories and logic.

Its added features make 87L51FA and 87L51FB an even more powerful microcontroller for applications that require pulse width modulation, high-speed I/O and up/down counting capabilities such as motor control. 87L51FA and 87L51FB also have a more versatile serial channel that facilitates multiprocessor communications.