EM6AB080
EtronTech
Table 16. Electrical Characteristics and Recommended A.C.Operating Condition
(VDD = 2.5V ± 0.2V, TA = 0~70 °C)
-4
-5
Symbol
Parameter
Unit Note
Min.
Max.
-
Min.
7.5
6
Max.
12
CL = 2
CL = 2.5
CL = 3
-
-
ns
ns
ns
tCK
tCK
tCK
Clock cycle time
-
12
4
12
5
12
tCH
tCL
Clock high level width
Clock low level width
0.45
0.45
0.55
0.55
0.45
0.45
0.55
0.55
t
CLMIN or
tCHMIN
t
CLMIN or
tCHMIN
tHP
Clock half period
-
-
ns
2
tHZ
tLZ
Data-out-high impedance time from CK,
Data-out-low impedance time from CK,
-
0.7
0.7
0.6
0.7
-
0.7
0.7
0.6
0.7
ns
ns
ns
ns
3
3
CK
CK
-0.7
-0.6
-0.7
-0.7
-0.6
-0.7
tDQSCK DQS-out access time from CK,
CK
tAC
Output access time from CK,
CK
tDQSQ
tRPRE
tRPST
tDQSS
DQS-DQ Skew
Read preamble
Read postamble
CK to valid DQS-in
-
0.4
-
0.4
ns
tCK
tCK
tCK
ns
tCK
tCK
tCK
tCK
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
tCK
ns
µs
tCK
ns
ns
ns
ns
ns
tCK
tCK
0.9
0.4
0.8
0
1.1
0.9
0.4
0.72
0
1.1
0.6
0.6
1.2
1.25
tWPRES DQS-in setup time
-
-
4
5
tWPRE
tWPST
tDQSH
tDQSL
tIS
DQS Write preamble
DQS write postamble
0.25
0.4
0.35
0.35
0.7
0.7
0.4
0.4
-
0.25
0.4
0.35
0.35
0.7
0.7
0.4
0.4
-
0.6
0.6
DQS in high level pulse width
DQS in low level pulse width
-
-
-
-
Address and Control input setup time
Address and Control input hold time
DQ & DM setup time to DQS
DQ & DM hold time to DQS
DQ/DQS output hold time from DQS
Row cycle time
-
-
6
6
tIH
-
-
tDS
-
-
tDH
-
-
tQH
tHP - tQHS
-
tHP - tQHS
55
-
tRC
55
70
40
15
15
8
-
-
tRFC
tRAS
tRCD
tRP
Refresh row cycle time
-
70
-
Row active time
70K
40
70K
Active to Read or Write delay
Row precharge time
-
15
-
-
15
-
tRRD
tWR
Row active to Row active delay
Write recovery time
-
10
-
12
2
-
15
-
tWTR
tMRD
tREFI
tXSRD
tXSNR
tDAL
tDIPW
tIPW
tQHS
tDSS
tDSH
Internal Write to Read Command Delay
Mode register set cycle time
Average Periodic Refresh interval
Self refresh exit to read command delay
-
2
-
8
-
10
-
-
7.8
-
7.8
7
200
75
-
200
75
-
Self refresh exit to non-read command delay
-
-
Auto Precharge write recovery + precharge time tWR+tRP
-
tWR+tRP
1.75
2.2
-
-
DQ and DM input pulse width
Control and Address input pulse width
Data Hold Skew Factor
1.75
2.2
-
-
-
-
-
0.5
-
0.5
-
DQS falling edge to CK setup time
DQS falling edge hold time from CK
0.2
0.2
0.2
0.2
-
-
Etron Confidential
12
Rev.1.1
Dec. /2013
ETRON [ ETRON TECHNOLOGY, INC. ]
