參數(shù)資料
型號: V54C365404VELF6
廠商: PROMOS TECHNOLOGIES INC
元件分類: DRAM
英文描述: 16M X 4 SYNCHRONOUS DRAM, 5.4 ns, PBGA60
封裝: LEAD FREE, MO-210, FBGA-60
文件頁數(shù): 10/54頁
文件大?。?/td> 694K
代理商: V54C365404VELF6
18
V54C365(16/80/40)4VE Rev.1.1 January 2005
ProMOS TECHNOLOGIES
V54C365(16/80/40)4VE
Notes for AC Parameters:
1.
For proper power-up see the operation section of this data sheet.
2.
AC timing tests have VIL = 0.8V and VIH = 2.0V with the timing referenced to the 1.4 V crossover point. The transition
time is measured between VIH and VIL. All AC measurements assume tT = 1ns with the AC output load circuit shown
in Figure 1.
4.
If clock rising time is longer than 1 ns, a time (tT/2 – 0.5) ns has to be added to this parameter.
5.
If tT is longer than 1 ns, a time (tT – 1) ns has to be added to this parameter.
6.
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)
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.
7.
Referenced to the time which the output achieves the open circuit condition, not to output voltage levels
24
tDQZ
DQM Data Out Disable Latency
2
2
2
2
CLK
Write Cycle
25
tWR
Write Recovery Time
2–
2
CLK
26
tDQW
DQM Write Mask Latency
0
0
0
0
CLK
#
Symbol
Parameter
Limit Values
Unit Note
-6
-7PC
-7
-8PC
Min. Max. Min. Max. Min. Max. Min. Max.
1.4V
tCS
tCH
tAC
tLZ
tOH
tHZ
CLK
COMMAND
OUTPUT
50 pF
I/O
Z=50 Ohm
+ 1.4 V
50 Ohm
VIH
VIL
tT
Figure 1.
tCK
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