¡ Semiconductor
AC Characteristics
Parameter
Clock Cycles Time
Access Time from Clock
Clock "H" Pulse Time
Clock "L" Pulse Time
Input Setup Time
Input Hold Time
Output Low Impedance Time from Clock
Output High Impedance Time from Clock
Output Hold from Clock
RAS
Cycle Time
RAS
Precharge Time
RAS
Active Time
RAS
to
CAS
Delay Time
Write Recovery Time
Write Command Input Time from Output
RAS
to
RAS
Bank Active Delay Time
Refresh Time
Power-down Exit Set-up Time
Input Level Transition Time
CAS
to
CAS
Delay Time (Min.)
Clock Disable Time from CKE
Data Output High Impedance Time from DQM
Data Input Mask Time from DQM
Data Input Time from Write Command
Data Output High Impedance Time from
Precharge Command
Active Command Input Time from Mode
Register Set Command Input (Min.)
CL = 3
CL = 2
CL = 3
CL = 2
Symbol
t
CC
t
AC
t
CH
t
CL
t
SI
t
HI
t
OLZ
t
OHZ
t
OH
t
RC
t
RP
t
RAS
t
RCD
t
WR
l
OWD
t
RRD
t
REF
t
PDE
t
T
l
CCD
l
CKE
l
DOZ
l
DOD
l
DWD
l
ROH
l
MRD
MD56V62320-10
Min.
10
15
—
—
3
3
3
1
3
—
3
90
30
60
30
15
2
20
—
t
SI
+ 1 CLK
—
1
1
2
0
0
2
3
Max.
—
—
9
9
—
—
—
—
—
8
—
—
—
10
5
—
—
—
—
64
—
3
MD56V62320
Note 1, 2
Unit Note
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Cycle
ns
ms
ns
ns
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
3
3, 4
3, 4
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