Diodes Incorporated — Analog and discrete power solutions
Back to PI6CG18801

PI6CG18801

Very Low Power 1.8V, 8-Output PCIe 4.0 Clock Generator With On-chip Termination

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.

Overview

Description

The PI6CG18801 is an 8-output very low power PCIe Gen1/Gen2/Gen3/Gen4 clock generator. It uses 25MHz crystal or CMOS reference as an input to generate the 100MHz low power differential HCSL outputs with on-chip terminations. The on-chip termination can save 32 external resistors and make layout easier. An additional buffered reference output is provided to serve as a low noise reference for other circuitry.

It uses Pericom proprietary PLL design to achieve very low jitter that meets PCIe Gen1/Gen2/Gen3/Gen4 requirements. It also pro- vides various options such as different slew rate and amplitude through strapping pins or SMBUS so that users can configure the device easily to get the optimized performance for their individual boards. The device also supports selectable spread- spectrum options to reduce EMI for various applications. 

Features

  • 1.8V supply voltage
  • Crystal/CMOS input: 25 MHz
  • 8 differential low power HCSL outputs with on-chip termination
  • Individual output enable
  • Reference CMOS output
  • Programmable Slew rate and output amplitude for each output
  • Differential outputs blocked until PLL is locked
  • Selectable 0%, -0.25% or -0.5% spread on differential outputs
  • Strapping pins or SMBus for configuration;
  • 3.3V tolerant SMBus interface support
  • Very low jitter outputs
  • Differential cycle-to-cycle jitter <50ps
  • Differential output-to-output skew <50ps
  • PCIe Gen1/Gen2/Gen3/Gen4 compliant
  • CMOS REFOUT phase jitter is < 1.5ps RMS
  • Packaging (Pb-free & Green): 48-lead 6×6mm TQFN 

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)

Standard

Function

Generator

Input Type(s)

Crystal, CMOS

Additive Jitter (ps)

<0.5

Number of Outputs

8

Maximum Output Frequency (MHz)

100

Output Type(s)

Low Power HCSL

Skew (PS)

50

Supply Voltage (V)

1.8

Ambient or Junction Temperature (°C)

-40 to 85

Purchase & Availability

Something went wrong with your request. Please try again later. If this problem continues, please contact Diodes support for assistance.

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2770 2025-10-30 2025-10-30 Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products