Shahzad Wrote:
So please suggest me a alternative processor variant of 8051 which can give me atleast the double memory space for program and it just replace 8052(8KB) in the existing circuit and the cost is also close to the 8052.

Erik asked:

Why, oh why just give him one choice? both Chris and I led him to tables of choices.

Well, Erik

1) Since he asked for the part number
2) And AT89C55WD is the only available part in our area which could meet his requirements.