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MB8508S064CE-100 Datasheet

  • MB8508S064CE-100

  • 8 M x 64 BIT SYNCHRONOUS DYNAMIC RAM SO-DIMM

  • 415.00KB

  • Fujitsu   Fujitsu

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MB8508S064CE-100/-100L
(3) CLOCK COUNT FORMULA (*9)
Clock
鈮?/div>
Base Value
Clock Period
(Round off a whole number)
(4) LATENCY (The latency values on these parameters are fixed regardless of clock period.)
No.
1
2
3
4
5
6
7
8
9
CKE to Clock Disable
DQM to Output in High-Z
DQM to Input Data Delay
Last Output to Write Command Delay
Write Command to Input Data Delay
Precharge to Output in High-Z Delay
Burst Stop Command to Output in High-Z Delay
CAS to CAS Delay (min)
CAS Bank Delay (min)
CL = 3
CL = 2
CL = 3
CL = 2
Parameter
Symbol
I
CKE
I
DQZ
I
DQD
I
OWD
I
DWD
I
ROH3
I
ROH2
I
BSH3
I
BSH2
I
CCD
I
CBD
MB8508S064CE
-100/100L
1
2
0
2
0
3
2
3
2
1
1
Unit
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Notes:
*1. An initial pause (DESL on NOP) of 200
碌s
is required after power-up followed by a minimum of eight
Auto-refresh cycles.
*2. 1.4 V or V
REF
is the reference level for measuring timing of signals.
Transition times are measured between V
IH
(min) and V
IL
(max).
*3. AC characteristics assume t
T
= 1 ns and 50 pF of capacitive load.
*4. Maximum value of CL = 2 depends on t
CK.
*5. t
AC
also specifies the access time at burst mode except for first access.
*6. Specified where output buffer is no longer driven. t
OH
, t
LZ
, and t
HZ
define the times at which the output
level achieves
鹵200
mV.
*7. Actual clock count of t
RC
(I
RC
) will be sum of clock count of t
RAS
(I
RAS
) and t
RP
(I
RP
).
*8. Operation within the t
RCD
(min) ensures that access time is determined by t
RCD
(min) + t
AC
(max); if t
RCD
is greater than the specified t
RCD
(min), access time is determined by t
AC
.
*9. All base values are measured from the clock edge at the command input to the clock edge for the next
command input.
All clock counts are calculated by a simple formula:
clock count equals base value divided by clock period (round off to a whole number).
*Source: See MB81F64842C Data Sheet for details on the electrical.
12

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