9FGU0841 Datasheet, PDF (1/16 Pages) Integrated Device Technology – Programmable Slew rate for each output

8-output 1.5V PCIe Gen1-2-3 Clock Generator
w/Zo=100ohms
9FGU0841
DATASHEET
General Description
The 9FGU0841 is a member of IDT's 1.5V Ultra-Low-Power
PCIe clock family with integrated output terminations
providing Zo=100Ω. The device has 8 output enables for clock
management, 2 different spread spectrum levels in addition to
spread off and 2 selectable SMBus addresses.
Recommended Application
• 1.5V PCIe Gen1-2-3 Clock Generator
Output Features
• 8 - 100MHz Low-Power (LP) HCSL DIF pairs
w/Zo=100ohms
• 1 - 1.5V LVCMOS REF output w/Wake-On-LAN (WOL)
support
Key Specification
• DIF cycle-to-cycle jitter <50ps
• DIF output-to-output skew < 60ps
• DIF phase jitter is PCIe Gen1-2-3 compliant
• REF phase jitter is < 3.0ps RMS
Functional Block Diagram
Features/Benefits
• Direct connection to 100ohm transmission lines; saves 32
resistors compared to standard PCIe devices
• 50mW typical power consumption; reduced thermal
concerns
• Outputs can optionally be supplied from any voltage
between 1.05 and 1.5V; maximum power savings
• OE# pins; support DIF power management
• Programmable Slew rate for each output; allows tuning for
various line length
• 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 EM
• 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
• Selectable SMBus addresses; multiple devices can easily
share an SMBus segment
• 3.3V tolerant SMBus interface works with legacy controllers
• Space saving 48-pin 6x6 mm VFQFPN; minimal board
space
vOE(7:0)#
XIN/CLKIN_25
X2
OSC
vSADR
vSS_EN_tri
^CKPWRGD_PD#
SDATA_3.3
SCLK_3.3
CONTROL
LOGIC
SS Capable PLL
REF1.5
DIF7
DIF6
DIF5
DIF4
DIF3
DIF2
DIF1
DIF0
9FGU0841 REVISION B 08/14/15
1
©2014 Integrated Device Technology, Inc.