* 8051 Central Processing Unit
  – 4k × 8 ROM (80C51)
  – 8k × 8 ROM (80C52)
  – 128 × 8 RAM (80C51)
  – 256 ×.

requiring more ROM and RAM, see the 8XC54/58 and 8XC51RA+/RB+/RC+/80C51RA+ data sheet. Note: 80C31/80C32 is specified i.

The Philips 80C51/87C51/80C52/87C52 is a high-performance static 80C51 design fabricated with Philips high-density CMOS technology with operation from 2.7 V to 5.5 V. The 8xC51 and 8xC52 contain a 128 × 8 RAM and 256 × 8 RAM respectively, 32 I/O line.

87C51

87C51FA

87C51FB

87C51FC

87C51FC-20

87C51GB

87C51SL

87C51X2

87C524

87C528

87C52X2

87C54

87C54-20