Product Databrief
www.pericom.com | 1-408-435-0800
PI2EQX5984
5.0Gbps 4-Lane PCIe
®
2.0 ReDriver™ with Equalization, Emphasis, & I
2
C Control
Features
• Up to 5.0Gbps PCI Express
®
2.0 Serial ReDriver
• Supporting 8 differential channels or 4 lanes
of PCIe Interface
• I
2
C configuration controls (3.3V tolerant)
• Adjustable receiver equalization and transmitter
de-emphasis and output levels
• Variable input an output termination
• 1:2 channel broadcast
• Channel loop-back/Mux and Demux Mode
• Electrical Idle fully supported
• Receiver detect and individual output control
• Fine adjustment of electrical idle threshold via I
2
C
• Single supply voltage, 1.2V ± 0.05V
• Power down modes
• Industrial Temp support, -40°C ~ +85°C
• Packaging: 72-contact TQFN, Pb-free & Green
Pericom Semiconductor’s PI2EQX5984 is a low power, PCIe
®
compliant signal ReDriver™. The device provides programmable
equalization, amplification, and de-emphasis by using 8 select
bits, to optimize performance over a variety of physical mediums
by reducing Inter-symbol interference.
PI2EQX5984 supports eight 100-Ohm Differential CML data
I/O’s between the Protocol ASIC to a switch fabric, across a
backplane, or extends the signals across other distant data
pathways on the user’s platform.
The integrated equalization circuitry provides flexibility with
signal integrity of the PCI Express signal before the ReDriver™,
whereas the integrated de-emphasis circuitry provides flexibility
with signal integrity of the signal after the redriver.
In addition to providing signal re-conditioning, Pericom’s
PI2EQX5984 also provides power management Stand-by mode
operated by a Bus Enable pin.
Block Diagram
+
−
+
−
+
−
+
−
+
−
+
−
A
B
xyTx-
xyTx+
xyRx+
xyRx-
Equalizer
Equalizer
Inputleveldetect
tocontrollogic
Output
Controls
Output
Controls
Inputleveldetect
tocontrollogic
DataLaneRepeats4Times
ControlRegisters
&Logic
Power
Management
I
2
CControl
SELy_x
Sy_x
Dy_x
DE_x
PD#
SDA
SCL
Mode
LB#
RES_x
RXD_x
Ax
xyTx-
xyTx+
xyRx+
xyRx-
Figure1
Redrivers with emphasis and equalization signal conditioning technology ensure
the integrity of high-frequency PCIe signals by opening closed signal eyes to
recover data and meet strict compliance testing requirements. Increased signal
margin also supports longer drive lenghts over even low-quality cables.
PCIe 2.0 Cable
Blade Server
Blade Server
PCIe 2.0
ReDriver
Figure1
