DATASHEET
ICS9DB403D
Four Output Differential Buffer for PCIe Gen 1 and Gen 2
Features/Benefits
Description
•
Spread spectrum modulation tolerant, 0 to -0.5% down
spread and +/- 0.25% center spread.
The ICS9DB403 is compatible with the Intel DB400v2 Differential
Buffer Specification.This buffer provides 4 PCI-Express Gen2 clocks.
The ICS9DB403 is driven by a differential output pair from a
CK410B+, CK505 or CK509B main clock generator.
•
Supports undriven differential outputs in PD# and
SRC_STOP# modes for power management.
Key Specifications
Output Features
•
•
•
•
•
4 - 0.7V current-mode differential output pairs
Supports zero delay buffer mode and fanout mode
Bandwidth programming available
50-100 MHz operation in PLL mode
50-400 MHz operation in Bypass mode
•
•
•
•
•
•
•
Outputs cycle-cycle jitter < 50ps
Outputs skew: 50ps
Phase jitter: PCIe Gen1 < 86ps peak to peak
Phase jitter: PCIe Gen2 < 3.0/3.1ps rms
28-pin SSOP/TSSOP pacakge
Available in RoHS compliant packaging
Supports Commercial (0 to +70°C) and Industrial (-40 to
+85°C) temperature ranges
Functional Block Diagram
4
2
-OE(6, 1)
OE(6,5,2,1)
SPREAD
COMPATIBLE
PLL
SRC_IN
SRC_IN#
4
M
STOP
LOGIC
DIF(6,5,2,1)
U
X
PD
BYPASS#/PLL
SDATA
CONTROL
LOGIC
SCLK
IREF
Note: Polarities shown for OE_INV = 0.
IDTTM/ICSTM Four Output Differential Buffer for PCIe and Gen 1 and Gen 2
ICS9DB403D
REV L 10/07/09
1