Hi Franc,

I thought there was a Dallas variant based on the same blueprint, but with their high speed core. DS87C550




DS87C550 EPROM Microcontroller with A/D and PWM

The DS87C550 microcontroller is a high-performance upgrade for
8051-microcontrollers which incorporate analog-to-digital converters. Combining the
performance of a 99 MHz 8051, an 8-channel, 10-bit A/D, and a 4-channel 8-bit
PWM, the device is ideal for industrial and instrumentation applications. With
commonly used features such as a watchdog timer, power-on reset circuitry, 2
UARTS, and more, the DS87C550 provides a highly integrated solution to
embedded system design problems.

• 8-channel, 10-bit A/D
• 4-channel PWM
• High-speed core
• 8 KB EPROM
• Power fail monitor
• Power management
modes
• 256 bytes scratchpad
RAM
• 1 KB MOVX SRAM
• Watchdog timer
• Two data pointers
• Low-power ring
oscillator
• Three 16-bit timers


Packages: PLCC, PQFP, Windowed CERQUAD


Steve