PI6CG18801

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

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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

Product Specifications

Product Parameters

Supply Voltage (V)	1.8
Jitter RMS (ps)	<0.5
Skew (PS)	50
Output Frequency (MHz)	100
Input Type(s)	Crystal, CMOS
Output Type(s)	Low Power HCSL
Number of Outputs	8
Function	Generator
Ambient or Junction Temperature (°C)	-40 to 85