1Gb: x8, x16 Automotive DDR2 SDRAM - Micron

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1gbddr2_ait_aat.pdf – Rev. C 7/11 EN 29 � 2010 Micron Technology, Inc. All rights reserved.
Table 11: 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
Data Strobe-In
DQS rising edge to
CK rising edge
DQS input-high
pulse width
DQS input-low
pulse width
DQS falling to CK
rising: setup time
DQS falling from
CK rising:
hold time
Write preamble
setup time
DQS write
preamble
DQS write
postamble
WRITE command
to first DQS
transition
tDQSS MIN = –0.25 × tCK MAX = 0.25 × tCK tDQSH MIN = 0.35 × tCK MAX = n/a
tDQSL MIN = 0.35 × tCK MAX = n/a
tDSS MIN = 0.2 × tCK MAX = n/a
tDSH MIN = 0.2 × tCK MAX = n/a
tWPRES MIN = 0
MAX = n/a
tWPRE MIN = 0.35 × tCK MAX = n/a
tWPST MIN = 0.4 × tCK MAX = 0.6 × tCK – MIN = WL - t DQSS
MAX = WL + t DQSS
t CK 18
t CK 18
t CK 18
t CK 18
t CK 18
ps 23, 24
t CK 18
t CK 18, 25
t CK
1Gb: x8, x16 Automotive DDR2 SDRAM
AC Timing Operating Specifications