* 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.

80C517A

80C51BH

80C51FA

80C51GB

80C51RA

80C51SL

80C51X2

80C52

80C52-16

80C528

80C52X2

80C535

80C537