A product Line of
Diodes Incorporated
diodes.com | 1-408-232-9100
PRODUCT BRIEF
PI3EQX8908A2
2.5Gbps/5.0Gbps/8.0Gbps 8-channel PCI Express ReDriver with Linear Equalization
Features
Description
Diodes Incorporated's PI3EQX8908A2 is a PCIe, 8 differential
channel ReDriver. The device provides programmable linear
equalization, output swing and gain, by either pin strapping option
or I
2
C Control, to optimize performance over a variety of physical
mediums by reducing Inter-symbol interference.
The PI3EQX8908A2 supports eight 100-Ohm Differential CML
data I/O’s and extends the signals across other distant data path-
ways on the user’s platform.
The programmable settings can be applied easily via pins, soft-
ware (I
2
C) or loaded via an external EEPROM. When operating in
the EEPROM mode, the conguration information is automatically
loaded on power up, which eliminates the need for an external
microprocessor or software driver.
The PI3EQX8908A2 offers fully Linear Transfer function to fully
comply with all PCIe 3 Link Training signals.
Eye Diagram
Host Channel Loss
Pericom
ReDriver
Device
End Point
Equalizer, De-emphasis,
Swing, and Amplifier Gain
Long input trace,
cable, or connectors
+
-
+
-
+
-
Output trace
+
-
+
-
+
-
+
-
Input trace
+
-
Long output trace,
cable, or connectors
Before Channel Loss
Before ReDriver
After ReDriver
TX
TX
RX
RX
2.5/5.0/8.0Gbps serial link with linear equalizer
Support PCIe Gen 1/2/3 protocol
Supporting 8 differential channels
Independent channel conguration of receiver
equalization, output swing and at gain
Per Channel Activity Detector with selectable input
termination between 50Ω to V
DD
and 200KΩ to V
DD
Per
Channel Output Termination Detector on power up with
selectable output termination between 50Ω to V
DD
and
High impedance
Very linear transfer function
Fully compliant to PCISIG Link Training
Single-ended mode receiver detection for PCIe
Input Threshold detection
Pin strap and I
2
C master/slave selectable device
programming with external EEPROM
4-bit selectable address bit for I
2
C
Supply Voltage: 3.3V±0.3V
Industrial Temperature Range: -40
o
C to 85
o
C
Packaging (Pb-free & Green):
54-contact TQFN
Ordering Information
Ordering Number
Package
Code Package Description
PI3EQX8908A2ZFE ZF
54-Contact, Very Thin
Quad Flat No-Lead (TQFN)
PI3EQX8908A2ZFEX ZF
54-Contact, Very Thin Quad Flat
No-Lead (TQFN), Tape & Reel
• Thermal characteristics can be found on the company web site at :
www.pericom.com/packaging/
Notes:
• E = Pb-free and Green • X sufx = Tape/Reel
