SY75604ATWL

Clock Buffers, Drivers Overview

The SY75604ATWL is a four-output PCIe clock buffer from Microchip Technology, designed for ultra-low additive jitter applications. It supports PCIe generations 1.0 through 5.0 with frequencies up to 250 MHz. The device features Low Power HCSL (LP-HCSL) outputs with embedded 85Ω differential termination resistors. It accepts DC-coupled HCSL inputs and AC-coupled PECL, LVDS, or CML signals. Operating voltages include 1.8V, 2.5V, and 3.3V ±10%. Each output has an individual glitch-free enable control pin. The component operates within an extended temperature range of –40°C to +105°C and is housed in a 16-lead 3 mm x 3 mm VQFN package.

Clock Buffers, Drivers Feature Summary

• Ultra-low additive jitter: 10 fs for PCIe Gen5, 20 fs for Gen3/Gen4, and 52 fs in the 12 kHz to 20 MHz band.
• Four LP-HCSL outputs with embedded 85Ω differential series termination resistors.
• Individual glitch-free Output Enable (OExb) control pins for each output channel.
• Supports input frequencies up to 250 MHz with transparent spread spectrum capability.

Clock Buffers, Drivers Applications

• PCIe graphics cards
• PCIe-based SSD drives
• Servers
• Laptops and desktop computers

Clock Buffers, Drivers Procurement Notes

Verify the specific suffix 'A' indicates 85Ω embedded termination when comparing against variants with different termination values. Confirm the package type matches the required PCB land pattern for the 16-lead VQFN form factor. Ensure supply voltage rails align with the supported 1.8V, 2.5V, or 3.3V operating ranges specified in the datasheet.

Clock Buffers, Drivers Selection Notes

Select the SY75604ATWL over the 'B' variant if the design requires 85Ω embedded termination resistors rather than 100Ω. This model provides four outputs; use the SY75602A for two-output configurations. Verify that the application requires the per-output enable functionality available on the SY75604 series compared to models without OExb pins.

Clock Buffers, Drivers Part Context

The SY75604ATWL belongs to the SY7560xA/B family of industry-leading PCIe clock buffers. It shares core specifications with the SY75602A and SY75603A but offers four output channels. The 'A' suffix specifically denotes the inclusion of 85Ω embedded termination resistors, distinguishing it from the 100Ω terminated 'B' series variants within the same product line.

Clock Buffers, Drivers Replacement Considerations

The SY75604BTWL serves as a direct functional substitute with identical electrical characteristics, differing only in the embedded termination resistance value (100Ω vs. 85Ω). Other members of the SY75602A/03A/04A family share similar jitter performance and input/output signaling standards.