EtronTech
EM6A9320BI
Electrical Characteristics and Recommended A.C. Operating Conditions
4Mx32 DDR SDRAM
(VDD = 2.5V ± 5%, Ta = 0~70 °C)
4
5
6
Symbol
Parameter
Unit
Min
Max
-
Min
75
6
Max
10
Min
75
6
Max
12
CL = 2
CL = 2.5
CL = 3
-
-
Clock cycle time
-
10
12
tCK
ns
4
10
0.55
5
10
6
12
Clock high level width
Clock low level width
0.45
0.45
0.55
0.45
0.55
tCH
tCL
tDQSCK
tAC
tCK
tCK
ns
ns
ns
tCK
tCK
tCK
ns
tck
tCK
tCK
tCK
ns
0.45
-0.7
-0.7
-
0.55
0.7
0.7
0.4
1.1
0.6
1.15
-
0.45
-0.7
-0.7
-
0.55
0.7
0.7
0.4
1.1
0.6
1.2
-
0.45
-0.7
-0.7
-
0.55
0.7
0.7
0.45
1.1
0.6
1.25
-
DQS-out access time from CK,CK#
Output access time from CK,CK#
DQS-DQ Skew
tDQSQ
tRPRE
tRPST
tDQSS
tWPRES
tWPREH
tWPST
tDQSH
tDQSL
tIS
Read preamble
0.9
0.4
0.85
0
0.9
0.4
0.8
0
0.9
0.4
0.75
0
Read postamble
CK to valid DQS-in
DQS-in setup time
DQS-in hold time
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
0.5
0.5
-
0.25
0.4
0.4
0.4
1.0
1.0
0.5
0.5
-
DQS write postamble
0.6
0.6
0.6
-
0.6
0.6
0.6
-
0.6
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
-
-
-
tIH
tDS
tDH
ns
ns
ns
-
-
-
-
-
-
tCLMIN or
tCHMIN
tCLMIN or
tCHMIN
tCLMIN or
tCHMIN
Clock half period
-
-
-
tHP
ns
Data hold skew factor
-
0.45
-
0.5
0.55
tQHS
tQH
tRC
tRFC
tRAS
tRCDRD
tRCDWR
tRP
ns
ns
Output DQS valid window
Row cycle time
-
-
-
tHP - tQHS
tHP - tQHS
tHP - tQHS
15
-
12
-
10
-
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
ns
Refresh row cycle time
Row active time
17
-
14
-
12
-
10
100K
8
100K
7
100K
RAS# to CAS# Delay in Read
RAS# to CAS# Delay in Write
Row precharge time
5
-
4
-
3
-
3
-
2
-
2
-
4
-
4
-
3
-
Row active to Row active delay
Write recovery time
3
-
2
-
2
-
tRRD
twR
3
-
2
-
2
-
Last data in to Read command
Col. Address to Col. Address delay
Mode register set cycle time
Auto precharge write recovery + Precharge
Self refresh exit to read command delay
Power down exit time
2
-
2
-
2
-
tCDLR
tCCD
tMRD
tDAL
tXSA
tPDEX
tREF
tJ
1
-
1
-
1
-
2
-
-
2
-
-
2
-
-
7
6
6
200
-
200
-
200
-
tIS + 2tCK
-
tIS + 2tCK
-
tIS + 2tCK
-
Refresh interval time
-
-
-
7.8
100
700
-
-
-
7.8
105
700
-
-
-
7.8
105
700
us
ps
ps
Short term jitter
CLK Rise time, Fall time
tR, tF
12
Rev 0.9C
May 2006
ETRON [ ETRON TECHNOLOGY, INC. ]
