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KMM5324004BSWG 数据表(PDF) 5 Page - Samsung semiconductor

部件名 KMM5324004BSWG
功能描述  4M x 32 DRAM SIMM Using 4Mx16, 4K Refresh, 5V
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制造商  SAMSUNG [Samsung semiconductor]
网页  http://www.samsung.com/Products/Semiconductor
标志 SAMSUNG - Samsung semiconductor

KMM5324004BSWG 数据表(HTML) 5 Page - Samsung semiconductor

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DRAM MODULE
KMM5324004BSW/BSWG
Test condition : Vih/Vil=2.6/0.8V, Voh/Vol=2.0/0.8V, output loading CL=100pF
Parameter
Symbol
-5
-6
Unit
Note
Min
Max
Min
Max
Hyper page mode cycle time
tHPC
20
25
ns
11
CAS precharge time (Hyper page cycle)
tCP
8
10
ns
RAS pulse width (Hyper page cycle)
tRASP
50
200K
60
200K
ns
RAS hold time from CAS precharge
tRHCP
30
35
ns
W to RAS precharge time(C-B-R refresh)
tWRP
10
10
ns
W to RAS hold time(C-B-R refresh)
tWRH
10
10
ns
Output data hold time
tDOH
5
5
ns
Output buffer turn off delay from RAS
tREZ
3
13
3
15
ns
6,12
Output buffer turn off delay from W
tWEZ
3
13
3
15
ns
6
W to data delay
tWED
15
15
ns
W pulse width
tWPE
5
5
ns
AC CHARACTERISTICS (0
°C≤TA≤70°C, Vcc=5.0V±10%. See notes 1,2.)
NOTES
An initial pause of 200us is required after power-up followed
by any 8 RAS-only or CAS-before-RAS refresh cycles before
proper device operation is achieved.
Input voltage levels are Vih/Vil. VIH(min) and VIL(max) are ref-
erence levels for measuring timing of input signals. Transi-
tion times are measured between VIH(min) and VIL(max) and
are assumed to be 5ns for all inputs.
Measured with a load equivalent to 2 TTL loads and 100pF.
Operation within the
tRCD(max) limit insures that tRAC(max)
can be met.
tRCD(max) is specified as a reference point only.
If
tRCD is greater than the specified tRCD(max) limit, then
access time is controlled exclusively by
tCAC.
Assumes that
tRCD
tRCD(max).
This parameter defines the time at which the output achieves
the open circuit and is not referenced for VOH or VOL.
tWCS is non-restrictive operating parameter. It is included in
the
data
sheet
as
electrical
characteristics
only.
If
tWCS
tWCS(min), the cycle is an early write cycle and the
data out pin will remain high impedance for the duration of
the cycle.
Either
tRCH or tRRH must be satisfied for a read cycle.
These parameters are referenced to the CAS leading edge in
early write cycles.
Operation within the
tRAD(max) limit insures that tRAC(max)
can be met.
tRAD(max) is specified as reference point only. If
tRAD is greater than the specified tRAD(max) limit access time
is controlled by
tAA.
tASC
≥6ns, Assume tT=2.0ns.
If RAS goes high before CAS high going, the open circuit
condition of the output is achieved by CAS high going. If CAS
goes high before RAS high going , the open circuit condition
of the output is achieved by RAS going.
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