Rainbow-electronics DS1251Y Bedienungsanleitung PDF herunterladen (Seite 12)

DS1251/DS1251P

12 of 22

MEMORY AC ELECTRICAL CHARACTERISTICS

Over the operating range (3.3V)

DS1251W-120

PARAMETER SYMBOL

MIN MAX

UNITS NOTES

Read Cycle Time t

RC

120 ns

Access Time t

ACC

120 ns

OE to Output Valid

t

OE

60 ns

CE to Output Valid

t

CO

120 ns

OE or CE to Output Active

t

COE

5ns5

Output High-Z from Deselection t

OD

40 ns 5

Output Hold from Address Change t

OH

5ns

Write Cycle Time t

WC

120 ns

Write Pulse Width t

WP

90 ns 3

Address Setup Time t

AW

0ns

Write Recovery Time t

WR

20 ns 10

Output High-Z from WE

t

ODW

40 ns 5

Output Active from WE

t

OEW

5ns5

Data Setup Time t

DS

50 ns 4

Data Hold Time from WE

t

DH

20 ns 4

PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS

Over the operating range (3.3V)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Read Cycle Time t

RC

120 ns

CE Access Time

t

CO

100 ns

OE Access Time

t

OE

100 ns

CE to Output Low-Z

t

COE

5ns

OE to Output Low-Z

t

OEE

5ns

CE to Output High-Z

t

OD

40 ns 5

OE to Output High-Z

t

ODO

40 ns 5

Read Recovery t

RR

20 ns

Write Cycle Time t

WC

120 ns

Write Pulse Width t

WP

100 ns 3

Write Recovery t

WR

20 ns 10

Data Setup Time t

DS

45 ns 4

Data Hold Time t

DH

0ns4

CE Pulse Width

t

CW

105 ns

RESET Pulse Width

t

RST

120 ns

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 21 22

Kommentare zu diesen Handbüchern

Keine Kommentare