28C256 EEPROM Problem, Data automatically corrupt

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kg300

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Hi friends, I have a problem using 28c256 EEPROM Chip. In a Chick Master Hatcher machine Board company use 28C256 Chip. I copy Data from original chip and program it in a new AT28C256 IC. Copied IC work well and oprate all the functions correct but after 3 or 4 hours (some time one day) IC software automatically corrupt and not operate properly. The orignal company IC work fine in the same circuit Board. I bout many new ICs but the problem is same.
Please cane anyone help me to solve the problem and is there any comparison of 28C256?

Thanks.
 

You try to compare the two manufacturers data for the two IC's. There seems to be supply voltage issue like 3 or 5 V or some thing similar.
After working for sometime it starts malfunctioning. Please check if it recovers on standing for some time or the data content is corrupt or lost.
 

Read datasheet for your EEPROM. It has additional software write protection:


I can guess that you have not enabled the software protection in new chip, but old original chip was written with software protection.
 

The original chip is X28HC256, I use AT28C256. Supply voltages is same of both chips (5 Volt) and after some time data content was corrupt, not lost. How can I do software protection.
 
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May be suggestions of post #3 seems worth considering and trying. Please give it a thought !
The animated pic on the left of post #3 is funny !!
Raoof
 

Is it possible to add software write protection in Hex file? Because I just copy the data from original chip in hex format.
 

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