W40S11-02H

Application Specific Clock/Timing Overview

The W40S11-02 is a low-voltage, ten-output clock buffer designed for driving SDRAM DIMMs in mobile systems. It features skew-controlled CMOS outputs with an impedance of approximately 15 Ω and propagation delays between 1.0 to 5.0 ns. The device operates on a single 3.3V supply and supports frequencies up to 133 MHz. It includes an I²C serial configuration interface for output control and utilizes a 28-pin SSOP package.

Application Specific Clock/Timing Feature Summary

• Ten skew-controlled CMOS outputs (SDRAM0:9) with less than 250 ps inter-output skew
• I²C serial configuration interface for individual output enable/disable control
• DC to 133-MHz operation with 1.0 to 5.0 ns propagation delay
• Single 3.3V supply voltage with low power CMOS design

Application Specific Clock/Timing Applications

• High-performance mobile systems based on Intel Mobile chipsets
• Driving two SDRAM DIMMs
• Clock distribution buffers for memory interfaces

Application Specific Clock/Timing Procurement Notes

Verify the manufacturer origin, as the datasheet identifies Cypress Semiconductor Corporation while the model query specifies Infineon Technologies. Confirm the package type matches the required 28-pin SSOP or TSSOP variant. Ensure the operating temperature range of 0°C to +70°C meets system requirements.

Application Specific Clock/Timing Selection Notes

Select this component when a ten-channel clock buffer with precise skew control (<250 ps) is required for SDRAM applications. The 15 Ω output impedance is optimized for DIMM loads. Consider the I²C interface if dynamic output control is needed. Verify compatibility with the 3.3V logic levels and 133 MHz maximum frequency.

Application Specific Clock/Timing Part Context

This component was originally manufactured by Cypress Semiconductor Corporation. The datasheet indicates it is ideal for high-performance systems designed around Intel’s latest Mobile chipset at the time of publication. It serves as a specialized buffer for memory clock signals rather than a general-purpose logic gate.

Application Specific Clock/Timing Replacement Considerations

Check for direct cross-references from Infineon Technologies if the brand specification is mandatory. Verify pinout and electrical parameters against other ten-channel SDRAM buffers if substituting with generic equivalents.

Application Specific Clock/Timing FAQ

How are the outputs controlled?

Outputs can be controlled via the OE pin (three-stated when LOW) or through the I²C serial interface, which allows individual enable/disable configuration for each of the ten outputs.

What is the typical output impedance?

The nominal output buffer impedance is 15 ohms, which is designed to be ideal for driving SDRAM DIMMs.

What is the slave address for the I²C interface?

The specific slave receiver address for the W40S11-02 is 11010010.