PI6C20800SIAEX

Overview

The PI6C20800SIAEX is a PCI Express high-speed, low-noise differential clock buffer manufactured by Diodes Incorporated. It distributes the differential SRC clock from the PI6C410BS to eight differential pairs of HCSL outputs. The device supports both PLL and fanout operation modes with an input frequency range up to 400 MHz in bypass mode. It operates on a single 3.3V supply (3.135V to 3.465V) within an industrial temperature range of -40°C to +85°C. Key electrical characteristics include output-to-output skew of less than 60ps and cycle-to-cycle jitter under 70ps.

Feature Summary

• Eight pairs of differential HCSL clock outputs for PCIe applications
• Supports PLL or Fanout operation with programmable PLL bandwidth
• Low skew (<60ps) and low cycle-to-cycle jitter (<70ps)
• Integrated SMBus interface for output enable, tristate control, and power management

Applications

• PCI Express clock distribution for Intel server chipsets
• High-speed data acquisition systems
• Telecommunications equipment requiring low-jitter clocking

Procurement Notes

Verify component authenticity through authorized channels as counterfeit components exist. Confirm RoHS compliance and lead-free status against current environmental directives. Check datasheet revision DS43446 Rev 2-2 for updated specifications. Ensure proper handling due to surface mount packaging requirements.

Selection Notes

Select this model for industrial temperature environments (-40°C to +85°C). Choose between PI6C20800SVEX for SSOP or PI6C20800SIAEX for TSSOP based on board space constraints. Verify that the application requires HCSL output levels and differential signaling. Consider SMBus integration needs for dynamic clock control.

Part Context

This component belongs to the PI6C20800S series designed specifically for PCIe GenII applications. It serves as a companion to the PI6C410BS clock generator. The 'I' suffix denotes the industrial temperature grade variant, while 'A' indicates the 48-pin TSSOP package type.

Replacement Considerations

Direct replacements must match the 48-TSSOP package and industrial temperature rating. Verify pin compatibility and electrical parameters such as voltage range and output current. Cross-reference with other Pericom/Diodes clock buffers if form-factor changes are acceptable.

FAQ

What is the maximum input frequency supported?

The maximum input frequency is 400 MHz in bypass mode and 105 MHz in PLL mode.

How is the output current configured?

Output current is set via an external resistor connected to the IREF pin, typically using a 475Ω 1% resistor for nominal operation.

Can the outputs be individually controlled?

Yes, individual output enables can be controlled via the SMBus interface or hardware pins like OE and OE_INV.