m464s3254hus Samsung Semiconductor, Inc., m464s3254hus Datasheet - Page 11

• Manufacturer Part Number: m464s3254hus
• Description: Sdram Unbuffered Sodimm
• Manufacturer: Samsung Semiconductor, Inc.

12.0 AC Operating Test Conditions
13.0 OPERATING AC PARAMETER
Note :
1. The minimum number of clock cycles is determined by dividing the minimum time required with clock cycle time and then rounding off to the next higher
2. Minimum delay is required to complete write.
3. All parts allow every cycle column address change.
4. In case of row precharge interrupt, auto precharge and read burst stop.
256MB, 512MB Unbuffered SODIMM
AC input levels (Vih/Vil)
Input timing measurement reference level
Input rise and fall time
Output timing measurement reference level
Output load condition
Row active to row active delay
RAS to CAS delay
Row precharge time
Row active time
Row cycle time
Last data in to row precharge
Last data in to Active delay
Last data in to new col. address delay
Last data in to burst stop
Col. address to col. address delay
Number of valid output data
integer.
Output
(Fig. 1) DC output load circuit
870Ω
Parameter
Parameter
3.3V
1200Ω
50pF
CAS latency=3
CAS latency=2
V
V
OH
OL
(DC) = 0.4V, I
(DC) = 2.4V, I
t
t
t
t
t
t
t
t
t
RAS
RRD
RCD
t
t
CCD
Symbol
RAS
RDL
DAL
CDL
BDL
RC
RP
(min)
(min)
(max)
(min)
(min)
(min)
(min)
(min)
(min)
(min)
(min)
OL
OH
= 2mA
= -2mA
See Fig. 2
tr/tf = 1/1
2.4/0.4
2 CLK + tRP
Value
1.4
1.4
Version
Output
100
7A
15
20
20
45
65
2
1
1
1
2
1
(AC operating conditions unless otherwise noted)
(Fig. 2) AC output load circuit
Rev. 1.0 November 2005
(V
Z0 = 50Ω
DD
= 3.3V ± 0.3V, T
Unit
CLK
CLK
CLK
CLK
ea
ns
ns
ns
ns
us
ns
-
Vtt = 1.4V
Unit
SDRAM
A
50Ω
ns
50pF
V
V
V
= 0 to 70°C)
Note
1
1
1
1
1
2
2
2
3
4