EtronTech
EM68C16CWQG
Table 27. Electrical Characteristics and Recommended A.C. Operating Conditions
(VDD = 1.8V 0.1V, TOPER = -40~95 C)
-18I
-25I
-3I
Specific
Notes
Symbol
Parameter
Unit
Min.
5
Max.
7.5
Min.
5
Max.
Min.
5
Max.
CL=3
CL=4
CL=5
CL=6
CL=7
8
8
8
8
ns 15, 33, 34
ns 15, 33, 34
ns 15, 33, 34
ns 15, 33, 34
ns 15, 33, 34
3.75
3
7.5
3.75
2.5
2.5
-
3.75
3
7.5
8
8
tCK(avg)
Average clock period
2.5
7.5
8
3
8
1.875
0.48
0.48
7.5
-
-
-
0.52
0.52
0.48
0.48
0.52
0.52
0.48
0.48
0.52
0.52
tCK
tCK
tCK
34, 35
34, 35
tCH(avg)
tCL(avg)
WL
Average clock HIGH pulse width
Average Clock LOW pulse width
RL-1
RL-1
RL-1
Write command to DQS associated clock edge
DQS latching rising transitions to associated
clock edges
-0.25
0.25
-0.25
0.25
-0.25
0.25
tCK
28
28
tDQSS
0.2
0.2
-
0.2
0.2
-
0.2
0.2
-
tCK
tCK
tCK
tCK
tCK
tCK
tDSS
DQS falling edge to CK setup time
DQS falling edge hold time from CK
DQS input HIGH pulse width
DQS input LOW pulse width
Write preamble
-
-
-
tDSH
0.35
0.35
0.35
0.4
-
-
0.35
0.35
0.35
0.4
-
-
0.35
0.35
0.35
0.4
-
-
tDQSH
tDQSL
tWPRE
tWPST
-
-
-
0.6
0.6
0.6
10
Write postamble
5, 7, 9,
22, 27
0.125
0.2
-
-
-
-
-
0.175
0.25
0.6
-
-
-
-
-
0.2
0.275
0.6
-
-
-
-
-
ns
ns
tCK
ns
ns
tIS(base) Address and Control input setup time
tIH(base) Address and Control input hold time
5, 7, 9,
23, 27
Control & Address input pulse width for each
input
0.6
tIPW
6-8, 20,
26, 29
0
0.05
0.125
0.1
tDS(base) DQ & DM input setup time
tDH(base) DQ & DM input hold time
6-8, 21,
26, 29
0.075
0.175
0.35
-
0.35
-0.4
-0.35
-
-
0.35
-0.45
-0.4
-
-
tCK
ns
ns
tDIPW
tAC
tDQSCK
tHZ
DQ and DM input pulse width for each input
DQ output access time from CK, CK#
-0.35
0.35
0.4
0.35
0.45
0.4
38
38
-0.325
-
0.325
tAC(max)
DQS output access time from CK, CK#
Data-out high-impedance time from CK, CK#
tAC(max)
tAC(max) ns
18, 38
DQS(DQS#) low-impedance time from CK,
CK#
DQ low-impedance time from CK, CK#
DQS-DQ skew for DQS and associated DQ
signals
tAC(min) tAC(max) tAC(min) tAC(max) tAC(min) tAC(max) ns
2tAC(min) tAC(max) 2tAC(min) tAC(max) 2tAC(min) tAC(max) ns
18, 38
18, 38
13
tLZ(DQS)
tLZ(DQ)
tDQSQ
-
0.175
-
-
0.2
-
-
0.24
-
ns
min
(tCH,tCL
min
(tCH,tCL
min
(tCH,tCL)
ns 11, 12, 35
tHP
CK half pulse width
)
)
-
0.25
-
0.3
-
0.34
ns
ns
tCK
tCK
ns
ns
tCK
ns
ns
12, 36
37
tQHS
tQH
DQ hold skew factor
tHP -tQHS
-
tHP -tQHS
-
tHP -tQHS
-
DQ/DQS output hold time from DQS
Read preamble
0.9
1.1
0.9
1.1
0.9
1.1
19, 39
19, 40
4, 30
4, 30
tRPRE
tRPST
tRRD
tFAW
tCCD
tWR
0.4
0.6
0.4
0.6
0.4
0.6
Read postamble
10
-
-
-
-
-
-
-
-
-
-
-
-
10
-
-
-
-
-
-
-
-
-
10
-
-
-
-
-
-
-
-
-
Active to active command period
Four Activate Window
45
45
50
2
2
2
CAS# to CAS# command delay
Write recovery time
15
15
15
30
WR + tRP
WR + tRP
WR + tRP
14, 31
tDAL
Auto Power write recovery + precharge time
Internal Write to Read Command Delay
Internal read to precharge command delay
CKE minimum pulse width
7.5
7.5
7.5
ns 3, 24, 30
tWTR
tRTP
tCKE
tXSNR
tXSRD
tXP
7.5
7.5
7.5
ns
tCK
ns
3, 30
25
3
tRFC+10
200
3
3
tRFC+10
200
2
3
tRFC+10
200
2
30
Exit self refresh to non-read command delay
Exit self refresh to a read command
Exit precharge power down to any command
Exit active power down to read command
-
-
-
-
-
-
tCK
tCK
tCK
3
2
2
1
tXARD
Rev. 1.2
26
Apr. /2016
ETRON [ ETRON TECHNOLOGY, INC. ]
