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W40S11-02 Datasheet, PDF (1/11 Pages) Cypress Semiconductor – SDRAM Buffer - 2 DIMM (Mobile) | |||
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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娉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 15â¦, 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 1
SDRAM0 2
SDRAM1 3
GND 4
VDD 5
SDRAM2 6
SDRAM3 7
GND 8
BUF_IN 9
VDD 10
SDRAM8 11
GND 12
VDD 13
SDATA [1] 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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