Rainbow-electronics DS1251Y Uživatelský manuál stáhnout pdf (Strana 10)

DS1251/DS1251P

10 of 22

MEMORY AC ELECTRICAL CHARACTERISTICS Over the operating range (5V)

DS1251Y-70

PARAMETER SYMBOL

MIN MAX

UNITS NOTES

Read Cycle Time t

70 ns

Access Time t

ACC

70 ns

OE to Output Valid

35 ns

CE to Output Valid

70 ns

OE or CE to Output Active

COE

5ns5

Output High-Z from Deselection t

25 ns 5

Output Hold from Address Change t

5ns

Write Cycle Time t

70 ns

Write Pulse Width t

50 ns 3

Address Setup Time t

0ns

Write Recovery Time t

0ns

Output High-Z from WE

ODW

25 ns 5

Output Active from WE

OEW

5ns5

Data Setup Time t

30 ns 4

Data Hold Time from WE

5ns4

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 21 22

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Rainbow-electronics DS1251Y Uživatelský manuál Strana 10