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HN58X2508I Datasheet, PDF (7/29 Pages) Renesas Technology Corp – Electrically Erasable and Programmable Read Only Memory
HN58X2508I/HN58X2516I
AC Characteristics
Test Conditions
Input pules levels:

VIL = VCC × 0.2

VIH = VCC × 0.8
Input rise and fall time: ≤ 10 ns
Input and output timing reference levels: VCC × 0.3, VCC × 0.7
Output reference levels: VCC × 0.5
Output load: 100 pF
Rev.2.00, Aug.19.2004, page 7 of 27