S-93C56A SII [Seiko Instruments Inc], S-93C56A Datasheet - Page 28

• Manufacturer Part Number: S-93C56A
• Description: CMOS SERIAL E2PROM
• Manufacturer: SII [Seiko Instruments Inc]

Collection of Product FAQs
Author: Ebisawa Takashi
<Information level>
<Product>
Related documents:
Question:
Answer:
A:
Index:
Division name: 01 IC
Category 1:
Category 2:
Cal No.:
What about the reliability and quality of the EEPROM?
1. The EEPROM must have a quality that is “special in a sense” and that differs from that of the other
(1) Number of possible rewrites: 105 or 106
(2) Data retention: 10 years
Ensuring (1) and (2) is very difficult in a technical sense, as well as in the sense that high quality must
be maintained despite the need for mass production.
2. Why this guarantee is technically difficult
ICs.
<What is this special quality?>
A specified minimum number of data rewrites must be assured.
It must be ensured that written data (‘1’ and ‘0’) will be stored for at least 10 years.
As shown in the figure below, the EEPROM functions as a non-volatile memory by holding charges
in FG.
Public (Printing O.K.)
C: quality, reliability
12 Memory
2. Serial EEPROM
Overall
Date: 99/01/13 (Wednesday) 18:19 (modified: 99/01/14)
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