ICS9DB803DI Datasheet, PDF (1/21 Pages) Integrated Device Technology – Eight Output Differential Buffer for PCIe Gen 2

Eight Output Differential Buffer for PCIe Gen 2
DATASHEET
ICS9DB803DI
Description
The 9DB803 is a DB800 Version 2.0 Yellow Cover part with PCI
Express Gen II support. It can be used in PC or embedded
systems to provide outputs that have low cycle-to-cycle jitter
(50ps), low output-to-output skew (100ps), and are PCI Express
Gen 2 compliant. The 9DB803 supports a 1 to 8 output
configuration, taking a spread or non spread differential HCSL
input from a CK410(B) main clock such as 954101 and
932S401, or any other differential HCSL pair. 9DB803 can
generate HCSL or LVDS outputs from 50 to 100MHz in PLL
mode or 50 to 400Mhz in bypass mode. There are two de-
jittering modes available selectable through the HIGH_BW#
input pin, high bandwidth mode provides de-jittering for spread
inputs and low bandwidth mode provides extra de-jittering for
non-spread inputs. The SRC_IN#, PD#, and individual OE real-
time input pins provide completely programmable power
management control.
Features/Benefits
• Spread spectrum modulation tolerant, 0 to -0.5% down
spread and +/- 0.25% center spread.
• Supports undriven differential outputs in PD# and
SRC_STOP# modes for power management.
Output Features
• 8 - 0.7V current-mode differential output pairs
• Supports zero delay buffer mode and fanout mode
• Bandwidth programming available
Key Specifications
• Outputs cycle-cycle jitter < 50ps
• Outputs skew: 50ps
• 50-100 MHz operation in PLL mode
• 50-400 MHz operation in Bypass mode
• Phase jitter: PCIe Gen1 < 86ps peak to peak
• Phase jitter: PCIe Gen2 < 3.1ps rms
• 48-pin SSOP/TSSOP package
• Available in RoHS compliant packaging
Funtional Block Diagram
8
OE_(7:0)
SRC_IN
SRC_IN#
SPREAD
COMPATIBLE
PLL
M
U
STOP
8
LOGIC
X
DIF(7:0))
SRC_STOP#
HIGH_BW#
BYPASS#/PLL
PD#
SDATA
SCLK
CONTROL
LOGIC
IREF
LOCK
Note: Polarities shown for OE_INV = 0.
IDT^TM/ICS^TM Eight Output Differential Buffer for PCIe Gen 2
1
ICS9DB803DI REV A 06/18/08