V54C3256164VBUC View Datasheet(PDF) - Mosel Vitelic, Corp
Part Name
Description
Manufacturer
V54C3256164VBUC
Mosel Vitelic, Corp
V54C3256164VBUC Datasheet PDF : 45 Pages
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MOSEL VITELIC
V54C3256164VBUC/T
AC Characteristics (Cont’d)
# Symbol Parameter
Read Cycle
21
tOH
22
tLZ
23
tHZ
24
tDQZ
Write Cycle
Data Out Hold Time
Data Out to Low Impedance Time
Data Out to High Impedance Time
DQM Data Out Disable Latency
25
tWR
Write Recovery Time
26 tDQW DQM Write Mask Latency
Limit Values
-6
-7PC
-7
-8PC
Min. Max. Min. Max. Min. Max. Min. Max. Unit Note
3–3–3–
3
–
ns
2
1–1–1–
0
–
ns
363737
3
8
ns
7
–2
–
2
–
2
–
2 CLK
2–
2
–
2
–
2
– CLK
0–
0
–
0
–
0
– CLK
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.
CLK
COMMAND
tCK
tCS tCH
1.4V
tAC
tLZ
VIH
VIL
tT
tAC
tOH
+ 1.4 V
50 Ohm
Z=50 Ohm
I/O
50 pF
OUTPUT
1.4V
tHZ
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
V54C3256164VBUC/T Rev. 1.1 February 2003
13
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