st93c66 replacement

i want to replace a duff st93c66 eeprom and have a m93c66. the difference is the st93 is clock speed 1MHz and the m93 its modern replacement is 2MHz. will it work on the 1MHz clock.

 

according to the spec sheets the only thing i can see is that the clock speed for the st is 1mhz and the m is 2 mhz. so im guessing that the m will run happily with a 1 mhz clock.or does it mean it has to be 1mhz???