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White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

WV3DG64127V-D2

April 2005

Rev. 0

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

ADVANCED*

OPERATING AC PARAMETERS

Parameter

Symbol

775

10

Unit

Note

Min

Max

Min

Max

Min

Max

CLK cycle time

CAS latency=3

7.5

1000

7.5

1000

10

1000

ns

1

CAS latency=2

7.5

10

10

CLK to valid output delay

CAS latency=3

5.4

5.4

6

ns

1, 2

CAS latency=2

5.4

6

6

Output data hold time

CAS latency=3

333

ns

2

CAS latency=2

3

3

3

CLK high pulse width

2.5

2.5

3

ns

3

CLK low pulse width

2.5

2.5

3

ns

3

Input setup time

1.5

1.5

2

ns

3

Input hold time

0.8

0.8

1

ns

3

CLK to output in Low-Z

111

ns

2

CLK to outpu in Hi-Z

CAS latency=3

5.4

5.4

6

ns

CAS latency=2

5.4

6

6

Notes :

1.

Parameters depend on programmed CAS latency.

2.

If clock rising time is longer than 1ns, (tr/2-0.5)ns should be added to the parameter.

3.

Assumed input rise and fall time (tr & tf) = 1ns.

If tr & tf is longer than 1ns, transient time compensation should be considered,

i.e., [(tr + tf)/2-1]ns should be added to the parameter.