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WCSS0418V1F Datasheet(PDF) 7 Page - Weida Semiconductor, Inc.

Part # WCSS0418V1F
Description  256K x 18 Synchronous 3.3V Cache RAM
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Manufacturer  WEIDA [Weida Semiconductor, Inc.]
Direct Link  http://www.weida.com.my/website/
Logo WEIDA - Weida Semiconductor, Inc.

WCSS0418V1F Datasheet(HTML) 7 Page - Weida Semiconductor, Inc.

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WCSS0418V1F
Document #: 38-05245 Rev. **
Page 7 of 18
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature ...................................–65°C to +150°C
Ambient Temperature with
Power Applied...............................................–55°C to +125°C
Supply Voltage on VDD Relative to GND ...............–0.5V to +4.6V
DC Voltage Applied to Outputs
in High Z State[5]...............................................–0.5V to VDD + 0.5V
DC Input Voltage[5]...........................................–0.5V to VDD + 0.5V
Current into Outputs (LOW) ........................................ 20 mA
Static Discharge Voltage .......................................... >2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current .................................................... >200 mA
Write Cycle Descriptions[1, 2, 3, 4]
Function
GW
BWE
BWS1
BWS0
Read
1
1
X
X
Read
1
011
Write Byte 0 - DQ[7:0] and DP0
1
010
Write Byte 1 - DQ[15:8] and DP1
1
001
Write All Bytes
1
0
0
0
Write All Bytes
0
X
X
X
Operating Range
Range
Ambient
Temperature[6]
VDD
VDDQ
Com’l
0°C to +70°C
3.135V to 3.6V
2.375V to VDD
Ind’l
–40°C +70°C
Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
7C1325B
Unit
Min.
Max.
VOH
Output HIGH Voltage
VDDQ = 3.3V, VDD = Min., IOH = –4.0 mA
2.4
V
VDDQ = 2.5V, VDD = Min., IOH = –2.0 mA
2.0
V
VOL
Output LOW Voltage
VDDQ = 3.3V, VDD = Min., IOL = 8.0 mA
0.4
V
VDDQ = 2.5V, VDD = Min., IOL = 2.0 mA
0.7
V
VIH
Input HIGH Voltage
VDDQ = 3.3V
2.0
VDD +
0.3V
V
VIH
Input HIGH Voltage
VDDQ = 2.5V
1.7
VDD +
0.3V
V
VIL
Input LOW Voltage[5]
VDDQ = 3.3V
–0.3
0.8
V
VIL
Input LOW Voltage[5]
VDDQ = 2.5V
–0.3
0.7
V
IX
Input Load Current
(except ZZ and MODE)
GND
≤ V
I ≤ VDDQ
−11
µA
Input Current of MODE
Input = VSS
–30
µA
Input = VDDQ
5
µA
Input Current of ZZ
Input = VSS
–5
µA
Input = VDDQ
30
µA
IOZ
Output Leakage Current
GND
≤ V
I ≤ VDD, Output Disabled
–5
5
µA
Notes:
4.
When a write cycle is detected, all I/Os are three-stated, even during byte writes.
5.
Minimum voltage equals –2.0V for pulse durations of less than 20 ns.
6.
TA is the case temperature.


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