Datasheet

T
T
T
S
S
S
3
3
3
2
2
2
M
M
M
L
L
L
R
R
R
7
7
7
2
2
2
V
V
V
6
6
6
F
F
F
168PIN PC133 Registered DIMM
256MB With 32Mx8 CL3
AC CHARACTERISTICS (AC operating conditions unless otherwise noted)
Refer to the individual component, not the whole module.
Parameter Symbol Value Unit Note
Min Max
CLK cycle time
CAS latency=2
t
CC
7.5
1000 ns 1
CLK to valid
output delay
CAS latency=2
t
SAC
5.4
ns 1, 2
Output data
hold time
CAS latency=2
tOH
2.7
ns 1, 2
CLK high pulse width tCH 2.5 ns 3
CLK low pulse width tCL 2.5 ns 3
Input setup time tSS 1.5 ns 3
Input hold time tSH 0.8 ns 3
CLK to output in Low-Z tSLZ 1 ns 2
CLK to output
in Hi-Z
CAS latency=3
t
SHZ
5.4
ns 1
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 paremeter.
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.
Transcend Information Inc. 8