EtronTech
EM68C08CWAE
Table 27. Electrical Characteristics and Recommended A.C. Operating Conditions
(VDD = 1.8V ± 0.1V, TOPER = 0 ~ 85°C)
-18
-25
-3
Specific
Notes
Symbol
Parameter
Unit
Min.
5
Max.
8
Min
5
Max.
8
8
Min.
5
Max.
8
8
15, 33, 34
15, 33, 34
15, 33, 34
15, 33, 34
15, 33, 34
34, 35
CL=3
CL=4
CL=5
CL=6
CL=7
ns
ns
ns
ns
ns
tCK
tCK
3.75
3
7.5
3.75
2.5
2.5
-
3.75
3
tCK(avg)
Average clock period
7.5
8
8
2.5
7.5
8
3
8
1.875
0.48
0.48
7.5
-
-
-
tCH(avg)
tCL(avg)
Average clock HIGH pulse width
Average Clock LOW pulse width
0.52
0.52
0.48
0.48
0.52
0.52
0.48
0.48
0.52
0.52
34, 35
Write command to DQS associated clock
edge
DQS latching rising transitions to
associated clock edges
WL
RL-1
RL-1
RL-1
tCK
tCK
28
28
tDQSS
-0.25
0.25
-0.25
0.25
-0.25
0.25
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
0.2
0.2
-
0.2
0.2
-
0.2
0.2
-
tCK
tCK
tCK
tCK
tCK
tCK
tDSH
-
-
-
-
-
-
tDQSH
tDQSL
tWPRE
tWPST
0.35
0.35
0.35
0.4
0.35
0.35
0.35
0.4
0.35
0.35
0.35
0.4
-
-
-
-
-
-
10
Write postamble
0.6
0.6
0.6
5, 7, 9,
22, 27
tIS(base)
tIH(base)
tIPW
Address and Control input setup time
Address and Control input hold time
0.125
0.2
-
-
-
-
-
-
0.175
0.25
0.6
-
-
-
-
-
-
0.2
-
-
-
-
-
-
ns
ns
tCK
ns
ns
tCK
5, 7, 9,
23, 27
0.275
0.6
Control & Address input pulse width for
each input
0.6
6-8, 20,
26, 29
tDS(base) DQ & DM input setup time
tDH(base) DQ & DM input hold time
0
0.05
0.125
0.35
0.1
6-8, 21,
26, 29
0.075
0.35
0.175
0.35
DQ and DM input pulse width for each
input
tDIPW
38
38
tAC
DQ output access time from CK, CK#
DQS output access time from CK, CK#
-0.35
0.35
-0.4
0.4
-0.45
-0.4
0.45
0.4
ns
ns
tDQSCK
-0.325
0.325
-0.35
0.35
Data-out high-impedance time from CK,
CK#
DQS(DQS#) low-impedance time from
CK, CK#
DQ low-impedance time from CK, CK#
18, 38
tHZ
-
t
t
AC(max)
AC(max)
-
t
t
AC(max)
AC(max)
-
t
t
AC(max) ns
AC(max) ns
tLZ(DQS)
18, 38
18, 38
13
t
AC(min)
t
AC(min)
t
AC(min)
tLZ(DQ)
tDQSQ
2tAC(min) tAC(max) 2tAC(min) tAC(max) 2tAC(min) tAC(max) ns
DQS-DQ skew for DQS and associated
DQ signals
-
0.175
-
-
0.2
-
-
0.24
-
ns
ns
min
(tCH,tCL
min
(tCH,tCL
min
(tCH,tCL)
11, 12, 35
tHP
CK half pulse width
)
)
tQHS
tQH
12, 36
37
DQ hold skew factor
-
0.25
-
0.3
-
-
0.34
ns
ns
tCK
tCK
ns
ns
tCK
ns
DQ/DQS output hold time from DQS
Read preamble
tHP -tQHS
0.9
0.4
7.5
35
-
tHP -tQHS
0.9
0.4
7.5
35
tHP -tQHS
0.9
-
19, 39
19, 40
4, 30
tRPRE
tRPST
tRRD
tFAW
tCCD
tWR
1.1
1.1
0.6
1.1
Read postamble
0.6
0.4
0.6
Active to active command period
Four Activate Window
-
-
-
-
-
7.5
-
-
-
-
-
37.5
2
CAS# to CAS# command delay
Write recovery time
2
2
-
-
30
15
15
15
Auto Power write recovery + precharge
time
Internal Write to Read Command Delay
Internal read to precharge command
delay
14, 31
3, 24, 30
3, 30
tDAL
tWTR
tRTP
WR + tRP
7.5
-
-
-
WR + tRP
7.5
-
-
-
WR + tRP
7.5
-
-
-
ns
ns
ns
7.5
7.5
7.5
Rev. 1.3
27
Oct. /2015
ETRON [ ETRON TECHNOLOGY, INC. ]
