ESMT

M52S128168A

Elite Semiconductor Memory Technology Inc.

Publication Date: Dec. 2008

Revision: 1.2

6/47

AC CHARACTERISTICS (AC operating conditions unless otherwise noted)

-7

-7.5

-10

Parameter

Symbol

Min

Max

Min

Max

Min

Max

Unit

Note

CAS Latency =3

7

1000

7.5

10

CLK cycle time

CAS Latency =2

9

9

1000

12

1000

ns

1

CAS Latency =3

5.5

6

7

CLK to valid

output delay

CAS Latency =2

7

7

10

ns

1

Output data hold time

2.5

2.5

2.5

ns

2

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

2

2

2.5

ns

3

Input hold time

1

1

1

ns

3

CLK to output in Low-Z

1

1

1

ns

2

CAS Latency =3

5.5

6

7

CLK to output in

Hi-Z

CAS Latency =2

7

7

10

ns

*All AC parameters are measured from half to half.

Note: 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.