PI6C557-03BLE

Overview

The PI6C557-03BLE is a PCIe 3.0 compliant spread spectrum clock generator manufactured by Diodes Incorporated. It accepts a 25 MHz crystal or clock input and provides two differential HCSL outputs at selectable frequencies of 25, 100, 125, or 200 MHz. The device operates on a 3.3V ±10% supply with an operating temperature range of -40°C to +85°C. Key electrical specifications include a typical cycle-to-cycle jitter of 35 ps and a high-frequency RMS jitter of 0.45 ps. It supports spread spectrum modulation options of -0.5%, -0.75%, or no spread, configurable via external pins.

Feature Summary

• PCIe 3.0 compliant with low phase jitter (0.45ps RMS High Freq Typ.)
• Supports HCSL and LVDS compatible output levels
• Configurable spread spectrum (-0.5%, -0.75%, No Spread) via external pins
• Industrial temperature range (-40°C to +85°C)

Applications

• PCI Express Gen 3 systems
• Ethernet applications
• PC and embedded systems requiring EMI reduction

Procurement Notes

Verify the 'BLE' suffix indicates the 16-pin TSSOP package variant as specified in local product fields. Confirm RoHS compliance and lead-free status against current manufacturer definitions. Check for automotive qualification requirements if AEC-Q100 standards are necessary for the specific application environment.

Selection Notes

Select this component for designs requiring dual differential clock outputs with spread spectrum capabilities. Ensure the design accommodates the 95 mA typical operating supply current. Verify that the external pin configuration for S0, S1, SS0, and SS1 aligns with the desired output frequency and spread settings defined in the datasheet tables.

Part Context

This part belongs to the PI6C557 series of clock generators from Diodes Incorporated. It is designed to replace legacy Pericom Semiconductor parts, maintaining functional compatibility while offering updated packaging and compliance features. The device serves as a critical timing source for high-speed serial interfaces like PCIe.

Replacement Considerations

The PI6C557-03BQE is the QSOP package equivalent. For PCIe Gen 2 applications, consider the 5V41065. For other PCIe Gen 3 variants, refer to the 5V41235.

FAQ

How is the output frequency selected?

The output frequency (25, 100, 125, or 200 MHz) is selected using the S0 and S1 input pins according to Table 1 in the datasheet.

What is the maximum cycle-to-cycle jitter?

The typical cycle-to-cycle jitter is 35 ps, with a maximum of 60 ps under specified conditions.

Can the device operate without spread spectrum?

Yes, the spread spectrum can be disabled by setting SS0 and SS1 appropriately, resulting in 'No Spread' operation.