SL28EB740AZI

Application Specific Clock/Timing Overview

The SL28EB740AZI is an EProClock generator designed for Intel Tunnel Creek and Top Cliff platforms, compliant with the Intel CK505 clock specification. It operates on a 3.3V supply within an industrial temperature range of -40°C to 85°C in a 56-pin TSSOP package. The device provides multiple differential outputs including CPU clocks (selectable frequencies), seven 100MHz SRC pairs, a 75MHz/100MHz selectable SATA/SRC pair, and a fixed 96MHz DOT clock. Single-ended outputs include 25MHz reference, 14.318MHz, 48MHz, and selectable 12/48MHz clocks. It features integrated SMBus programming, Wake-On-LAN support, and triangular spread spectrum modulation.

Application Specific Clock/Timing Feature Summary

• EProClock non-volatile programmable technology allowing configuration via SMBus or hard-coded OTP.
• Compliant with Intel CK505 clock specification for low power push-pull differential buffers.
• Supports Wake-On-LAN (WOL) with 25MHz reference output enabled during VDD suspend states.
• Includes triangular Spread Spectrum profile for electromagnetic interference reduction.

Application Specific Clock/Timing Applications

• Intel Tunnel Creek platform clock generation
• Intel Top Cliff platform clock generation
• Workstation and embedded system timing solutions

Application Specific Clock/Timing Procurement Notes

Verify the specific ordering suffix 'AZI' against the manufacturer's current documentation to confirm package type and temperature grade. Ensure the source document explicitly defines the functional differences associated with this suffix variant before procurement.

Application Specific Clock/Timing Selection Notes

Select this component for systems requiring Intel CK505 compliance and non-volatile programmability. Verify that the required CPU frequency selection straps match the available FS pin configurations. Confirm that the 56-pin TSSOP package fits the board layout constraints and that the 3.3V supply voltage aligns with the system design.

Application Specific Clock/Timing Part Context

This component belongs to the SL28EB series of clock generators from Skyworks Solutions Inc., utilizing EProClock technology. It serves as a central timing solution for specific Intel processor platforms, replacing traditional crystal oscillator and buffer combinations with a single programmable synthesizer.

Application Specific Clock/Timing Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet. Consult the manufacturer's official cross-reference documentation for verified replacements.

Application Specific Clock/Timing FAQ

How is the SATA/SRC0 frequency selected?

The SATA/SRC0 frequency is selected via the SEL_SATA75 input pin. A logic level of 0 sets the frequency to 100MHz, while a logic level of 1 sets it to 75MHz.

What is the function of the CKPWRGD/PD# pin?

During initial power-up, this pin functions as CKPWRGD to latch input settings. Once sampled HIGH, it becomes PD#, an asynchronous active-low input used to cleanly shut off all clocks before power removal.

Does the device support Wake-On-LAN?

Yes, the SL28EB740 supports Wake-On-LAN. When power is applied to the VDD_SUSPEND pin, the 25MHz reference clock output is enabled by default, allowing the system to wake from suspend states.