Rainbow-electronics DS1248Y Bedienungsanleitung PDF herunterladen (Seite 6)

DS1248Y

032697 6/12

MEMORY AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; V

= 5.0V ± 10%)

PARAMETER

SYMBOL

DS1248Y–120

DS1248Y–150 DS1248Y–200

UNITS

NOTES

PARAMETER

SYMBOL

MIN MAX MIN MAX MIN MAX

UNITS

NOTES

Read Cycle Time t

120 150 200 ns

Access Time t

ACC

120 150 200 ns

OE to Output Valid t

60 70 100 ns

CE to Output Valid t

120 150 200 ns

OE or CE to Output Active t

COE

5 5 5 ns 5

Output High Z from Deselection t

40 70 100 ns 5

Output Hold from Address

Change

5 5 5 ns

Write Cycle Time t

120 150 200 ns

Write Pulse Width t

90 100 150 ns 3

Address Setup Time t

0 0 0 ns

Write Recovery Time t

20 20 20 ns

Output High Z from WE t

ODW

40 70 80 ns 5

Output Active from WE t

OEW

5 5 5 ns 5

Data Setup Time t

50 60 80 ns 4

Data Hold Time from WE t

20 20 20 ns 4

AC TEST CONDITIONS

Output Load: 50 pF + 1TTL Gate

Input Pulse Levels: 0–3V

Timing Measurement Reference Levels

Input: 1.5V

Output: 1.5V

Input Pulse Rise and Fall Times: 5 ns

1 2 3 4 5 6 7 8 9 10 11 12

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