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參數資料
型號: W942516CH
廠商: WINBOND ELECTRONICS CORP
英文描述: 4M X 4 BANKS X 16 BIT DDR SDRAM
中文描述: 4米× 4銀行× 16位DDR SDRAM
文件頁數: 8/47頁
文件大小: 2809K
代理商: W942516CH
W942516CH
- 8 -
7. ELECRICAL CHARACTERISTICS
7.1 Absolute Maximum Ratings
PARAMETER
SYMBOL
RATING
UNIT
Input/Output Voltage
V
IN,
V
OUT
-0.3
V
DDQ
+0.3
V
Power Supply Voltage
V
DD,
V
DDQ
-0.3
3.6
V
Operating Temperature
T
OPR
0
70
°
C
Storage Temperature
T
STG
-55
150
°
C
Soldering Temperature (10s)
T
SOLDER
260
°
C
Power Dissipation
P
D
1
W
Short Circuit Output Current
I
OUT
50
mA
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
7.2 Recommended DC Operating Conditions
(T
A
= 0 to 70
°
C)
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
NOTES
V
DD
Power Supply Voltage
2.3
2.5
2.7
V
2
V
DDQ
Power Supply Voltage (for I/O
Buffer)
2.3
2.5
V
DD
V
2
V
REF
Input reference Voltage
0.49 x V
DDQ
0.50 x V
DDQ
0.51 x V
DDQ
V
2, 3
V
TT
Termination Voltage (System)
V
REF
- 0.04
VREF
V
REF
+ 0.04
V
2, 8
V
IH (DC)
Input High Voltage (DC)
V
REF
+ 0.15
-
V
DDQ
+ 0.3
V
2
V
IL (DC)
Input Low Voltage (DC)
-0.3
-
V
REF
- 0.15
V
2
V
ICK (DC)
Differential Clock DC Input Voltage
-0.3
-
V
DDQ
+ 0.3
V
15
V
ID (DC)
Input Differential Voltage.
CLK and
CLK
inputs (DC)
0.36
-
V
DDQ
+ 0.6
V
13, 15
V
IH (AC)
Input High Voltage (AC)
V
REF
+ 0.31
-
-
V
2
V
IL (AC)
Input Low Voltage (AC)
-
-
V
REF
- 0.31
V
2
V
ID (AC)
Input Differential Voltage.
CLK and
CLK
inputs (AC)
0.7
-
V
DDQ
+ 0.6
V
13, 15
V
X (AC)
Differential AC input Cross Point
Voltage
V
DDQ
/2 - 0.2
-
V
DDQ
/2 + 0.2
V
12, 15
V
ISO (AC)
Differential Clock AC Middle Point
V
DDQ
/2 - 0.2
-
V
DDQ
/2 + 0.2
V
14, 15
Notes: Undershoot Limit: V
IL
(min) = -0.9V with a pulse width < 5 nS
Overshoot Limit: V
IH
(max) = V
DD
Q +0.9V with a pulse width < 5 nS
V
IH (DC)
and V
IL (DC)
are levels to maintain the current logic state.
V
IH (AC)
and V
IL (AC)
are levels to change to the new logic state.
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