EM6A9320BIA
EtronTech
Table 18. Electrical Characteristics and Recommended A.C. Operating Conditions
(VDD = 2.5V ± 5%, TA = 0~70 °C)
-4
-5
Symbol
Parameter
Unit
Min.
4
Max.
10
Min.
5
Max.
10
tCK
tCH
tCL
Clock cycle time
CL = 3
ns
tCK
tCK
Clock high level width
Clock low level width
0.45
0.45
0.55
0.55
0.45
0.45
0.55
0.55
tDQSCK DQS-out access time from CK,
-0.7
-0.7
0.7
0.7
-0.7
-0.7
0.7
0.7
ns
ns
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
0.9
0.4
0.85
0
1.1
0.9
0.4
0.8
0
1.1
0.6
0.6
1.15
1.2
tWPRES DQS-in setup time
tWPRE DQS Write preamble
-
-
0.35
0.4
0.4
0.4
0.9
0.9
0.45
0.45
-
0.25
0.4
0.4
0.4
1.0
1.0
0.45
0.45
-
tCK
tCK
tCK
tCK
ns
tWPST
tDQSH
tDQSL
tIS
DQS write postamble
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
tIH
ns
tDS
ns
tDH
DQ & DM hold time to DQS
ns
t
CLMIN or
tCHMIN
t
CLMIN or
tCHMIN
tHP
Clock half period
-
-
ns
tQH
DQ/DQS output hold time from DQS
Row cycle time
tHP - tQHS
-
tHP - tQHS
-
ns
ns
ns
ns
ns
ns
tCK
tCK
tCK
tCK
tCK
ns
µs
ns
ns
tRC
60
68
40
20
16
3
-
60
-
tRFC
tRAS
tRCD
tRP
Refresh row cycle time
Row active time
-
70
-
100K
40
100K
Active to Read or Write delay
Row precharge time
-
20
-
-
18
-
tRRD
tWR
Row active to Row active delay
Write recovery time
-
2
3
-
3
-
-
tMRD
tDAL
tXSRD
tPDEX
tREFI
tIPW
tDIPW
Mode register set cycle time
2
-
2
-
Auto precharge write recovery + Precharge time tWR + tRP
-
tWR + tRP
200
tCK + tIS
-
-
Self refresh exit to read command delay
Power down exit time
200
tCK + tIS
-
-
-
-
-
Refresh interval time
7.8
-
7.8
-
Cntrol and Address input pulse width
DQ & DM input pulse width (for each input)
2.2
2.2
1.75
-
1.75
-
tHZ
tLZ
Data-out high-impedance window from CK/
-
0.7
0.7
-
0.7
0.7
ns
ns
CK
Data-out low-impedance window from CK/
-0.7
-0.7
CK
tQHS
DVW
Data Hold Skew Factor
-
0.45
-
0.5
ns
ns
ns
tCK
Output data valid window
tQH - tDQSQ
-
-
-
tQH - tDQSQ
-
-
-
tXSNR
tCCD
Exit Self-Refresh to non-Read command
CAS# to CAS# Delay time
75
1
75
1
Etron Confidential
13
Rev 1.7
Nov. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
