EM68932DVKB
EtronTech
Table 12. Electrical AC Characteristics
(VDD=1.7V~1.95V, TA =-25~85°C)
-6
-75
Symbol
Parameter
Unit Note
Min.
12
Max.
-
Min.
12
Max.
-
1
CL = 2
CL = 3
ns
tCK
Clock cycle time
1
6
100
0.55
0.55
5.5
7.5
0.45
0.45
2
100
0.55
0.55
6
ns
tCH
Clock high level width
0.45
0.45
2
tCK
tCK
ns
tCL
Clock low level width
DQS-out access time from CK,
tDQSCK
CK
Output access time from CK,
2
3
tAC
2
-
5.5
0.5
1.1
0.6
1.25
-
2
-
6
0.6
1.1
0.6
1.25
-
ns
ns
CK
tDQSQ
tRPRE
tRPST
tDQSS
DQS-DQ Skew
Read preamble
Read postamble
CK to valid DQS-in
0.9
0.4
0.75
0
0.9
0.4
0.75
0
tCK
tCK
tCK
ns
tWPRES DQS-in setup time
tWPRE
tWPST
tDQSH
tDQSL
DQS write preamble
0.25
0.4
0.4
0.4
-
0.25
0.4
0.4
0.4
-
tCK
tCK
tCK
tCK
DQS write postamble
0.6
0.6
0.6
0.6
0.6
0.6
DQS in high level pulse width
DQS in low level pulse width
1
tIS
Address and Control input setup time
Address and Control input hold time
DQ & DM setup time to DQS
1.1
1.1
0.6
0.6
-
-
-
-
1.3
1.3
0.8
0.8
-
-
-
-
ns
ns
ns
ns
1
tIH
4, 5
4, 5
tDS
tDH
tHP
DQ & DM hold time to DQS
tCLMIN or
tCHMIN
tHP
tCLMIN or
tCHMIN
tHP
Clock half period
-
-
-
-
ns
ns
–
–
tQH
Output DQS valid window
0.65
0.75
67.5
110
45
tRC
tRFC
tRAS
tRCD
tRP
Row cycle time
60
-
-
ns
ns
ns
ns
ns
ns
ns
tCK
tCK
tCK
tCK
ns
ns
µs
Refresh row cycle time
Row active time
110
42
-
-
100K
100K
ACTIVE to READ or WRITE delay
Row precharge time
18
-
22.5
22.5
15
-
18
-
-
tRRD
twR
Row active to Row active delay
Write recovery time
12
-
-
8
7
12
-
15
-
tDAL
tWTR
tCCD
tMRD
tXSR
tXP
Auto precharge write recovery + Precharge time tWR+tRP
-
tWR+tRP
1
-
Internal Write to Read Delay
2
1
-
-
Col. Address to Col. Address delay
Mode register set cycle time
-
1
-
2
-
2
-
Self refresh exit to next valid command delay
Exit Power Down mode to first valid command
Refresh interval time
200
25
-
-
-
200
25
-
-
6
tREFI
Note:
15.6
-
15.6
1. Table 13.Input Setup / Hold Slew Rate Derating
Input Setup/Hold Slew Rate (V/ns)
△
△
tIH (ps)
tIS (ps)
0
1.0
0.8
0.6
0
+50
+50
+100
+100
This derating table is used to increase tIS / tIH in the case where the input slew rate is below 1.0V/ns.
Etron Confidential
16
Rev. 1.0
Aug. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
