87C550 microcontroller equivalent, 80c51 8-bit microcontroller.
* 80C51 based architecture
– 4k × 8 EPROM (87C550)/ROM (83C550)
– 128 × 8 RAM
– Eight channels of 8-bit A/D
 .
The Philips 8XC550 is a high-performance microcontroller fabricated with Philips high-density CMOS technology. This Philips CMOS technology combines the high speed and density characteristics of HMOS with the low power attributes of CMOS. Philips epi.
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