DATASHEET
2 OUTPUT PCIE GEN1/2/3 SYNTHESIZER 5V41235
IDT®
2 OUTPUT PCIE GEN1/2/3 SYNTHESIZER 1
5V41235 REV H 011217
Recommended Applications
2 Output synthesizer for PCIe Gen1/2/3 and Ethernet
General Description
The 5V41235 is a PCIe Gen2/3 compliant spread spectrum
capable clock generator. The device has 2 differential
HCSL outputs and can be used in communication or
embedded systems to substantially reduce
electro-magnetic interference (EMI). The spread amount
and output frequency are selectable via select pins. The
5V41235 can also supply 25 MHz, 125 MHz and 200 MHz
outputs for applications such as Ethernet.
Output Features
• 2 - 0.7V current mode differential HCSL output pairs
Features/Benefits
• 16-pin TSSOP and QFN packages; small board footprint
• Spread-spectrum capable; reduces EMI
• Outputs can be terminated to LVDS; can drive a wider
variety of devices
• TSSOP package: 25MHz, 100MHz, 125MHz and
200MHz output frequencies.
• QFN package: 100MHz and 200MHz output frequencies.
• OE control pin; greater system power management
• Spread% and frequency pin selection; no software
required to configure device
• Industrial temperature range available; supports
demanding embedded applications
Key Specifications
• Cycle-to-cycle jitter < 100 ps
• Output-to-output skew < 50 ps
• PCIe Gen2 phase jitter < 3.0ps RMS
• PCIe Gen3 phase jitter <1.0ps RMS
Block Diagram
Phase Lock Loop
Clock
Buffer/
Crystal
Oscillator
VDD
GND
X1/ICLK
X2
25 MHz
crystal or clock
Control
Logic
SS1:SS0
2
S1:S0
2
CLK0
CLK0
Rr(IREF)
CLK1
CLK1
2
2
OE
Optional tuning crystal
capacitors
