V54C316162VC
Notes for AC Parameters:
1.For proper power-up see the operation section of this data sheet.
2.AC timing tests have V = 0.8V and V = 2.0V with the timing referenced to the 1.4 V crossover point. The transition
IL
IH
time is measured between V and V . All AC measurements assume t = 1ns with the AC output load circuit shown
IH
IL
T
in Figure 1
tCK
VIH
VIL
CLK
+ 1.4 V
t
T
tCS
tCH
50 Ohm
1.4V
COMMAND
Z=50 Ohm
I/O
tAC
tAC
tLZ
50 pF
tOH
1.4V
OUTPUT
tHZ
Figure 1.
3.If clock rising time is longer than 1 ns, a time (t /2 – 0.5) ns has to be added to this parameter.
T
4.If t is longer than 1 ns, a time (t – 1) ns has to be added to this parameter.
T
T
5.These parameter account for the number of clock cycle and depend on the operating frequency of the clock, as
follows:
the number of clock cycle = specified value of timing period (counted in fractions as a whole number)
6.Self Refresh Exit is a synchronous operation and begins on the 2nd positive clock edge after CKE returns high.
Self Refresh Exit is not complete until a time period equal to tRC is satisfied once the Self Refresh Exit command
is registered.
V54C316162VC Rev. 1.4 December 2001
12
MOSEL [ MOSEL VITELIC, CORP ]
