RTC chips with parallel interface

[Jens Sch�nfeld]

Hi list,

I'm looking for cheap and available RTC chips with parallel interface (intel IOR/IOW timing). Preferrable something that's compatible with the Ricoh 5C01, 5C15 or 5C62 (all discontinued). I know that the Oki 6242 is software compatible (different pinout), but that's out of my budget. I need about 500 of these chips.

I might as well change the software to work with a different chip. The requested ones have a 4-bit interface, but I can easily change to 8 bit. The only thing that cannot be changed is the number of address lines available: I only have 4 of them on the connector the clock module hooks to. Plus pre-decoded select/IOR/IOW lines, so I'd prefer to pay some more cents for the chip rather than making a serial interface to the CPU.

Any suggestions?

--
Jens Sch�nfeld

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