W40S01-04
SDRAM Buffer - 4 DIMM
Features
鈥?Eighteen skew controlled CMOS outputs (SDRAM0:17)
鈥?Supports four SDRAM DIMMs
鈥?Ideal for high-performance systems designed around
Intel廬鈥檚 440BX chip set
鈥?I
2
C serial configuration interface
鈥?Output skew between any two outputs is less than
250 ps
鈥?1 to 5 ns propagation delay
鈥?DC to 133-MHz operation
鈥?Single 3.3V supply voltage
鈥?Low power CMOS design packaged in a 48-pin SSOP
(Small Shrink Outline Package)
Key Specifications
Supply Voltages: ....................................... V
DDQ3
= 3.3V鹵5%
Operating Temperature:.................................... 0擄C to +70擄C
Input Threshold: .................................................. 1.5V typical
Maximum Input Voltage: ...................................V
DDQ3
+ 0.5V
Input Frequency:............................................... 0 to 133 MHz
BUF_IN to SDRAM0:17 Propagation Delay: ...... 1.0 to 5.0 ns
Output Edge Rate:.................................................. >1.5 V/ns
Output Skew: ............................................................ 鹵250 ps
Output Duty Cycle: .................................. 45/55% worst case
Output Impedance: ........................................15 ohms typical
Output Type: ................................................ CMOS rail-to-rail
Part to Part Skew:........................................................700 ps
Overview
The Cypress W40S01-04 is a low-voltage, eighteen-output
signal buffer. Output buffer impedance is approximately 15鈩?/div>
which is ideal for driving SDRAM DIMMs.
Block Diagram
SDATA
SCLOCK
Serial Port
Device Control
OE
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
BUF_IN
SDRAM9
SDRAM10
SDRAM11
SDRAM12
SDRAM13
SDRAM14
SDRAM15
SDRAM16
SDRAM17
Pin Configuration
SSOP
NC
NC
VDDQ3
SDRAM0
SDRAM1
GND
VDDQ3
SDRAM2
SDRAM3
GND
BUF_IN
VDDQ3
SDRAM4
SDRAM5
GND
VDDQ3
SDRAM6
SDRAM7
GND
VDDQ3
SDRAM16
GND
VDDQ3
SDATA
[1]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
NC
NC
VDDQ3
SDRAM15
SDRAM14
GND
VDDQ3
SDRAM13
SDRAM12
GND
OE
[1]
VDDQ3
SDRAM11
SDRAM10
GND
VDDQ3
SDRAM9
SDRAM8
GND
VDDQ3
SDRAM17
GND
GND
[1]
SCLOCK
Note:
1. Internal pull-up resistor of 250K on SDATA, SCLOCK, and OE
inputs (not CMOS level).
Intel is a registered trademark of Intel Corporation.
Cypress Semiconductor Corporation
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134
鈥?/div>
408-943-2600
June 20, 2000, rev. **
W40S01-04相關型號PDF文件下載
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型號
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描述
廠商
下載
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SDRAM Buffer - 4 DIMM
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SPECTRALINEAR&n...
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英文版
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英文版
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SPECTRALINEAR
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英文版
SDRAM Buffer - 2 DIMM (Mobile)
SPECTRALINEAR&n...
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