EM68B16DVAA
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.
-
CL = 2
CL = 3
1
ns
Clock cycle time
tCK
6
100
0.55
0.55
7.5
100
0.55
0.55
1
ns
Clock high level width
Clock low level width
0.45
0.45
0.45
0.45
tCH
tCK
tCK
ns
tCL
2
2
5.5
5.5
2
2
6
6
DQS-out access time from CK,
tDQSCK
CK
CK
2
Output access time from CK,
tAC
ns
DQS-DQ Skew
-
0.5
1.1
0.6
1.25
-
-
0.6
1.1
0.6
1.25
-
tDQSQ
tRPRE
tRPST
tDQSS
tWPRES
tWPRE
tWPST
tDQSH
tDQSL
ns
tCK
tCK
tCK
Read preamble
0.9
0.4
0.75
0
0.9
0.4
0.75
0
Read postamble
CK to valid DQS-in
DQS-in setup time
3
ns
DQS write preamble
DQS write postamble
DQS in high level pulse width
DQS in low level pulse width
0.25
0.4
0.4
0.4
-
0.25
0.4
0.4
0.4
-
tCK
tCK
tCK
tCK
0.6
0.6
0.6
0.6
0.6
0.6
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
-
-
-
-
1
tIS
ns
1
tIH
ns
4, 5
tDS
tDH
ns
DQ & DM hold time to DQS
4, 5
ns
tCLMIN or
tCHMIN
tCLMIN or
tCHMIN
Clock half period
-
-
tHP
ns
Output DQS valid window
Row cycle time
-
-
tQH
tHP – 0.65
tHP – 0.75
67.5
ns
ns
ns
ns
ns
ns
ns
60
110
42
-
-
-
-
tRC
Refresh row cycle time
Row active time
110
tRFC
tRAS
tRCD
100K
45
100K
18
-
22.5
-
to
RAS CAS
Delay for Read or Write
Row precharge time
18
-
22.5
-
tRP
Row active to Row active delay
Write recovery time
12
-
15
-
tRRD
twR
12
-
15
-
8
ns
Auto precharge write recovery + Precharge
Internal Write to Read Delay
tWR+tRP
-
tWR+tRP
-
tDAL
tWTR
tCCD
tMRD
tXSR
tXP
tCK
2
1
-
1
1
-
7
tCK
Col. Address to Col. Address delay
Mode register set cycle time
-
-
tCK
tCK
ns
2
-
-
2
-
-
Self refresh exit to next valid command delay
200
25
-
200
25
-
Exit Power Down mode to first valid command
Refresh interval time
-
-
6
ns
7.8
7.8
tREFI
Note:
µs
1. Table 13.Input Setup / Hold Slew Rate Derating
Input Setup/Hold Slew Rate (V/ns)
△
△
tIH (ps)
tIS (ps)
1.0
0.8
0.6
0
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
15
Rev. 1.0
Mar. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
