MT47H256 Просмотр технического описания (PDF) - Micron Technology
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MT47H256 Datasheet PDF : 133 Pages
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Table 12: AC Operating Specifications and Conditions (Continued)
Not all speed grades listed may be supported for this device; refer to the title page for speeds supported; Notes: 1–5 apply to the entire table;
VDDQ = 1.8V ±0.1V, VDD = 1.8V ±0.1V
AC Characteristics
-187E
-25E
-25
-3E
-3
-37E
-5E
Parameter
Symbol Min Max Min Max Min Max Min Max Min Max Min Max Min Max Units Notes
DQ output access
tAC –350 350 –400 400 –400 400 –450 450 –450 450 –500 500 –600 600 ps
19
time from CK/CK#
DQS–DQ skew,
tDQSQ
–
175
– 200 – 200 – 240 – 240 – 300 – 350 ps 26, 27
DQS to last DQ
valid, per group,
per access
DQ hold from next
DQS strobe
tQHS
–
250
– 300 – 300 – 340 – 340 – 400 – 450 ps
28
DQ–DQS hold, DQS tQH
to first DQ not val-
id
MIN = tHP - tQHS
MAX = n/a
ps 26, 27,
28
CK/CK# to DQ, DQS tHZ
High-Z
MIN = n/a
MAX = tAC (MAX)
ps 19, 21,
29
CK/CK# to DQ
tLZ2
Low-Z
MIN = 2 × tAC (MIN)
MAX = tAC (MAX)
ps 19, 21,
22
Data valid output
window
DVW
MIN = tQH - tDQSQ
MAX = n/a
ns 26, 27
DQ and DM input
tDSb
0
setup time to DQS
–
50
–
50
– 100 – 100 – 100 – 150 –
ps 26, 30,
31
DQ and DM input tDHb
75
hold time to DQS
–
125 – 125 – 175 – 175 – 225 – 275 –
ps 26, 30,
31
DQ and DM input
tDSa
200
–
250 – 250 – 300 – 300 – 350 – 400 –
ps 26, 30,
setup time to DQS
31
DQ and DM input tDHa 200
–
250 – 250 – 300 – 300 – 350 – 400 –
ps 26, 30,
hold time to DQS
31
DQ and DM input
pulse width
tDIPW
MIN = 0.35 × tCK
MAX = n/a
tCK 18, 32
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