A-Data
AC Characteristics
Speed
Parameter
Symbol
Min
System clock
Cycle time
/CAS Latency = 3
/CAS Latency = 2
tCK3
tCK2
tCHW
tCLW
tAC3
tAC2
tRC
tRCD
tRAS
tRP
tCCD
tDQM
tOH
tDS
tDH
tAS
tAH
tCKS
tCKH
tCMS
tCMH
tOLZ
tMRD
tPDE
tSRE
tREF
5.5
7.5
2
2
-
-
57
15
42
15
1
0
2.75
1.5
0.8
1.5
0.8
1.5
0.8
1.5
0.8
1
1
1
1
-
1000
-
-
5
5.4
-
-
100K
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
64
-5.5
Max
Min
6
7.5
2
2
-
-
57
15
42
15
1
0
2.75
1.5
0.8
1.5
0.8
1.5
0.8
1.5
0.8
1
1
1
1
-6
Max
1000
-
-
5
5.4
-
-
100K
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
64
Min
7
7.5
2.5
2.5
-
-
57
15
42
15
1
0
3
1.5
0.8
1.5
0.8
1.5
0.8
1.5
0.8
1
2
1
1
-7
ADS7616A4A
Unit
Max
1000
-
-
5.4
5.4
--
-
100K
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
64
ns
ns
ns
ns
CLK
CLK
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CLK
CLK
CLK
ms
ns
ns
ns
ns
Note
Clock high pulse width
Clock low pulse width
Access time form /CAS Latency = 3
clock
/CAS Latency = 2
1
1
2
/RAS cycle time Operation
/RAS to /CAS delay
/RAS active time
/RAS precharge time
/CAS to /CAS delay
DQM to data – in mask
Data – out hold time
Data – input setup time
Data – input hold time
Address setup time
Address hold time
CKE setup time
CKE hold time
Command setup time
Command hold time
CLK to data output in low Z-time
MRS to new command
Power down exit time
Self refresh exit time
Refresh time
1
1
1
1
1
1
1
1
3
Note :
1. Assume tR / tF (input rise and fall time) is 1 ns.
2. Access times to be measured with input signals of 1v / ns edge rate.
3.A new command can be given tRRC after self refresh exit.
Rev 1.0 April, 2001
6
A-DATA [ A-DATA TECHNOLOGY ]
