參數(shù)資料
型號: W9425G6EH-5I
廠商: WINBOND ELECTRONICS CORP
元件分類: DRAM
英文描述: 16M X 16 DDR DRAM, 0.7 ns, PDSO66
封裝: 0.400 INCH, ROHS COMPLIANT, TSOP2-66
文件頁數(shù): 21/54頁
文件大?。?/td> 0K
代理商: W9425G6EH-5I
W9425G6EH
Publication Release Date:Dec. 03, 2008
- 28 -
Revision A08
AC Characteristics and Operating Condition, continued
-4
-5/-5I
-6/-6I
SYM.
PARAMETER
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
UNIT
NOTES
tWPRE
DQS Write Preamble Time
0.25
tWPST
DQS Write Postamble Time
0.4
0.6
0.4
0.6
0.4
0.6
tDQSS
Write Command to First DQS Latching
Transition
0.85
1.15
0.72
1.25
0.75
1.25
tCK
11
tIS
Input Setup Time (fast slew rate)
0.6
0.75
19, 21-23
tIH
Input Hold Time (fast slew rate)
0.6
0.75
19, 21-23
tIS
Input Setup Time (slow slew rate)
0.7
0.8
20-23
tIH
Input Hold Time (slow slew rate)
0.7
0.8
20-23
tIPW
Control & Address Input Pulse Width (for each
input)
2.2
tHZ
Data-out
High-impedance
Time
from
CLK, CLK
-0.7
0.7
-0.7
0.7
-0.7
0.7
tLZ
Data-out
Low-impedance
Time
from
CLK, CLK
-0.7
0.7
-0.7
0.7
-0.7
0.7
tT(SS)
SSTL Input Transition
0.5
1.5
0.5
1.5
0.5
1.5
nS
tWTR
Internal Write to Read Command Delay
2
1
tCK
tXSNR
Exit Self Refresh to non-Read Command
72
75
nS
tXSRD
Exit Self Refresh to Read Command
200
tCK
tREFi
Refresh Interval Time (8k/ 64mS)
7.8
S
17
tMRD
Mode Register Set Cycle Time
8
10
12
nS
9.7 AC Test Conditions
PARAMETER
SYMBOL
VALUE
UNIT
Input High Voltage (AC)
VIH
VREF + 0.31
V
Input Low Voltage (AC)
VIL
VREF - 0.31
V
Input Reference Voltage
VREF
0.5 x VDDQ
V
Termination Voltage
VTT
0.5 x VDDQ
V
Differential Clock Input Reference Voltage
VR
Vx (AC)
V
Input Difference Voltage. CLK and CLK Inputs (AC)
VID (AC)
1.5
V
Output Timing Measurement Reference Voltage
VOTR
0.5 x VDDQ
V
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