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W40S11-02 fiches techniques PDF

Cypress Semiconductor - SDRAM Buffer - 2 DIMM (Mobile)

Numéro de référence W40S11-02
Description SDRAM Buffer - 2 DIMM (Mobile)
Fabricant Cypress Semiconductor 
Logo Cypress Semiconductor 





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W40S11-02 fiche technique
W40S11-02
SDRAM Buffer - 2 DIMM (Mobile)
Features
• Ten skew-controlled CMOS outputs (SDRAM0:9)
• Supports two SDRAM DIMMs
• Ideal for high-performance systems designed around
Intel®’s latest Mobile chip set
• I2C Serial configuration interface
• Skew between any two outputs is less than 250 ps
• 1 to 5 ns propagation delay
• DC to 133-MHz operation
• Single 3.3V supply voltage
• Low power CMOS design packaged in a 28-pin, 209-mil
SSOP (Shrink Small Outline Package)
Overview
The Cypress W40S11-02 is a low-voltage, ten-output clock
buffer. Output buffer impedance is approximately 15, which
is ideal for driving SDRAM DIMMs.
Key Specifications
Supply Voltages:........................................... VDD = 3.3V±5%
Operating Temperature:.................................... 0°C to +70°C
Input Threshold: .................................................. 1.5V typical
Maximum Input Voltage: .......................................VDD + 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: ............................................................ ±250 ps
Output Duty Cycle: .................................. 45/55% worst case
Output Impedance: ........................................15 ohms typical
Output Type: ................................................ CMOS rail-to-rail
Block Diagram
Pin Configuration
SDATA
SCLOCK
Serial Port
Device Control
BUF_IN
OE
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
SDRAM9
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 VDD
27 SDRAM7
26 SDRAM6
25 GND
24 VDD
23 SDRAM5
22 SDRAM4
21 GND
20 OE [1]
19 VDD
18 SDRAM9
17 GND
16 GND
15 SCLOCK[1]
Note:
1. Internal pull-up resistor of 250K on SDATA, SCLOCK, and OE
inputs (should not be relied upon for pulling up to VDD).
Intel is a registered trademark of Intel Corporation.
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
September 29, 1999, rev. **

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