9FGV0231 Datasheet, PDF (1/15 Pages) Integrated Device Technology – Programmable Slew rate for each output

2-OUTPUT VERY LOW POWER PCIE GEN1-2-3 CLOCK GENERATOR
DATASHEET
9FGV0231
Description
The 9FGV0231 is a 2-output very low power clock
generator for PCIe Gen 1, 2 and 3 applications. The device
has 2 output enables for clock management and supports 2
different spread spectrum levels in addition to spread off.
Recommended Application
PCIe Gen1-2-3 clock generator
Output Features
• 2 - 0.7V low-power HCSL-compatible (LP-HCSL) DIF
pairs
• 1 - 1.8V LVCMOS REF output w/Wake-On-LAN (WOL)
support
Key Specifications
• DIF cycle-to-cycle jitter <50ps
• DIF output-to-output skew <50ps
• DIF phase jitter is PCIe Gen1-2-3 compliant
• REF phase jitter is <1.5ps RMS
Features/Benefits
• 1.8V operation; reduced power consumption
• OE# pins; support DIF power management
• LP-HCSL differential clock outputs; reduced power and
board space
• Programmable Slew rate for each output; allows tuning
for various line lengths
• Programmable output amplitude; allows tuning for
various application environments
• DIF outputs blocked until PLL is locked; clean system
start-up
• Selectable 0%, -0.25% or -0.5% spread on DIF outputs;
reduces EMI
• External 25MHz crystal; supports tight ppm with 0 ppm
synthesis error
• Configuration can be accomplished with strapping pins;
SMBus interface not required for device control
• 3.3V tolerant SMBus interface works with legacy
controllers
• Space saving 24-pin 4x4 mm VFQFPN; minimal board
space
Block Diagram
X1_25
X2
OE(1:0)#
OSC
SS Capable PLL
SADR
SS_EN_tri
CKPWRGD_PD#
SDATA_3.3
SCLK_3.3
CONTROL
LOGIC
REF1.8
2
DIF(1:0)
IDT® 2-OUTPUT VERY LOW POWER PCIE GEN1-2-3 CLOCK GENERATOR
1
9FGV0231
REV C 020315