Hallo Daniel,

Philips has also ISP and ERAM. Please read datasheets.

It's not wise to insist on DIP40 package, today. Modern '51 derivatives are rather fast and have additional features like PCA which highly benefit from minimizing package size. Compare length of internal connection from Vcc pin and Gnd pin to die: Use of DIP40 package results in 5 times the inductivity compared to modern package styles! This inductivity erodes the function of power supply decoupling and leads to increased ground bounce.

Bye,
Kai