DESCRIPTION
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.

FEATURES
• 80C51 central processing unit
• 3.0 to 4.5V VCC range
• 8k × 8 EPROM (87L51FA) 16k × 8 EPROM (87L51FB)
    – Expandable externally to 64k bytes
    – Quick Pulse programming algorithm
    – Two level program security system
• 256 × 8 RAM, expandable externally to 64k bytes
• Three 16-bit timer/counters
    – T2 is an up/down counter
• Programmable Counter Array (PCA)
    – High speed output
    – Capture/compare
    – Pulse Width Modulator
    – Watchdog Timer
• Four 8-bit I/O ports
• Full-duplex enhanced UART
    – Framing error detection
    – Automatic address recognition
• Power control modes
    – Idle mode
    – Power-down mode
• Once (On Circuit Emulation) Mode
• Five package styles
• OTP package available