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W9425G6EH
AC Characteristics and Operating Condition, continued
SYM.
PARAMETER
MIN.
-4
MAX.
-5/-5I
MIN. MAX.
-6/-6I
MIN. MAX.
UNIT
NOTES
t WPRE
DQS Write Preamble Time
0.25
0.25
0.25
t WPST
t DQSS
DQS Write Postamble Time
Write Command to First DQS Latching
Transition
0.4
0.85
0.6
1.15
0.4
0.72
0.6
1.25
0.4
0.75
0.6
1.25
t CK
11
t IS
t IH
t IS
t IH
t IPW
Input Setup Time (fast slew rate)
Input Hold Time (fast slew rate)
Input Setup Time (slow slew rate)
Input Hold Time (slow slew rate)
Control & Address Input Pulse Width (for each
input)
0.6
0.6
0.7
0.7
2.2
0.6
0.6
0.7
0.7
2.2
0.75
0.75
0.8
0.8
2.2
nS
19, 21-23
19, 21-23
20-23
20-23
t HZ
t LZ
Data-out
CLK, CLK
Data-out
CLK, CLK
High-impedance
Low-impedance
Time
Time
from
from
-0.7
-0.7
0.7
0.7
-0.7
-0.7
0.7
0.7
-0.7
-0.7
0.7
0.7
t T(SS)
t WTR
t XSNR
t XSRD
t REFi
t MRD
SSTL Input Transition
Internal Write to Read Command Delay
Exit Self Refresh to non-Read Command
Exit Self Refresh to Read Command
Refresh Interval Time (8k/ 64mS)
Mode Register Set Cycle Time
0.5
2
72
200
8
1.5
7.8
0.5
2
75
200
10
1.5
7.8
0.5
1
75
200
12
1.5
7.8
t CK
nS
t CK
μS
nS
17
9.7
AC Test Conditions
PARAMETER
Input High Voltage (AC)
Input Low Voltage (AC)
Input Reference Voltage
Termination Voltage
Differential Clock Input Reference Voltage
Input Difference Voltage. CLK and CLK Inputs (AC)
Output Timing Measurement Reference Voltage
SYMBOL
V IH
V IL
V REF
V TT
V R
V ID (AC)
V OTR
VALUE
V REF + 0.31
V REF - 0.31
0.5 x V DDQ
0.5 x V DDQ
V x (AC)
1.5
0.5 x V DDQ
UNIT
V
V
V
V
V
V
V
Publication Release Date:Dec. 03, 2008
- 28 -
Revision A08
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