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W40S11-02 Datasheet

  • W40S11-02

  • SDRAM Buffer - 2 DIMM (Mobile)

  • 11頁

  • CYPRESS

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W40S11-02
SDRAM Buffer - 2 DIMM (Mobile)
Features
鈥?Ten skew-controlled CMOS outputs (SDRAM0:9)
鈥?Supports two SDRAM DIMMs
鈥?Ideal for high-performance systems designed around
Intel廬鈥檚 latest Mobile chip set
鈥?I
2
C Serial configuration interface
鈥?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 28-pin, 209-mil
SSOP (Shrink Small Outline Package)
Key Specifications
Supply Voltages:........................................... V
DD
= 3.3V鹵5%
Operating Temperature:.................................... 0擄C to +70擄C
Input Threshold: .................................................. 1.5V typical
Maximum Input Voltage: .......................................V
DD
+ 0.5V
Input Frequency:............................................... 0 to 133 MHz
BUF_IN to SDRAM0:9 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
Overview
The Cypress W40S11-02 is a low-voltage, ten-output clock
buffer. Output buffer impedance is approximately 15鈩? which
is ideal for driving SDRAM DIMMs.
Block Diagram
Pin Configuration
SDATA
SCLOCK
Serial Port
Device Control
OE
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
VDD
SDRAM0
SDRAM1
GND
VDD
SDRAM2
SDRAM3
GND
BUF_IN
VDD
SDRAM8
GND
VDD
SDATA
[1]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD
SDRAM7
SDRAM6
GND
VDD
SDRAM5
SDRAM4
GND
OE
[1]
VDD
SDRAM9
GND
GND
SCLOCK
[1]
BUF_IN
SDRAM9
Note:
1. Internal pull-up resistor of 250K on SDATA, SCLOCK, and OE
inputs (should not be relied upon for pulling up to V
DD
).
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
September 29, 1999, rev. **

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