4 Channel 5Gbps PCIe® Signal
Repeater
®
89HP0504PB
Data Sheet
Device Overview
The IDT 89HP0504PB (P0504PB) is a 5Gbps PCIe® Repeater
device featuring IDT EyeBoost™ technology that compensates for cable
and board trace attenuations and ISI jitter, thereby extending connection
reach. The device is optimized for PCIe Gen1 and Gen2 high speed
serial data streams and contains four data channels, each able to
process 5Gbps transmission rates. Each channel consists of an input
equalizer and amplifier, signal detection with glitch filter, as well as
programmable output swing and de-emphasis. Allowing for application
specific optimization, the P0504PB, with its configurable receiver and
transmitter features, is ideal for PCIe applications using a wide
combination of cables and board trace materials.
All modes of active data transfer are designed with minimized power
consumption. In full shutdown mode, the part consumes less than
40mW in worst case environmental conditions.
Features
Compensates for cable and PCB trace attenuation and ISI
jitter
Programmable receiver equalization up to 24db
Programmable transmitter swing and de-emphasis
Recovers data stream even when the differential signal eye
is completely closed due to trace attenuation and ISI jitter
Full PCIe protocol support
Configurable via external pins
Leading edge power minimization in active and shutdown
modes
No external bias resistors or reference clocks required
Channel mux mode, demux mode, 1 to 2 channels multicast,
and Z-switch function mode
Available in a 36-pin QFN package (4.0 x 7.5mm with 0.5mm
pitch)
Applications
Blade servers, rack servers
PCIe instrumentation
Storage systems
Cabled PCIe devices
Benefits
Extends maximum cable length to over 8 meters and trace
length over 48 inches in PCIe applications
Minimizes BER
Typical Application
Server
Backplane
Server
Chipset
PCIe gen1,2
(Trace, eg. FR4)
IDT
Repeater
PCIe gen1,2
(Trace)
IDT
Repeater
PCIe gen1,2
(Trace, eg. FR4)
Chipset
Figure 1 IDT Repeaters in Blade Servers
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
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©
2011 Integrated Device Technology, Inc
February 8, 2011
IDT 89HP0504PB Data Sheet
PCIe Compliance
The device was designed to provide end users with features needed to comply with PCIe system application requirements:
–
Receiver Detection Support, PCIe Beacon Support
–
Receiver supports high impedance mode for PCIe
–
Jitter, eye opening, and all other key AC and DC specifications.
Block Diagram
The P0504PB contains four high speed channels as shown in Figure 2. Each channel can be routed to different outputs. Depending on user
configuration via mode selections, input traffic can be muxed or demuxed. Powerdown (PDB) and Receiver Detection Reset (RSTB) are provided for
state and channel control.
Figure 2 Block Diagram
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February 8, 2011
Table of Contents
Device Overview ................................................................................................................................ 1
Applications........................................................................................................................................ 1
Features............................................................................................................................................. 1
Benefits .............................................................................................................................................. 1
Typical Application ............................................................................................................................. 1
PCIe Compliance ............................................................................................................................... 2
Block Diagram.................................................................................................................................... 2
Functional Description ....................................................................................................................... 5
Power-Up................................................................................................................................... 6
Power Sequencing..................................................................................................................... 6
IDT EyeBoost™ Technology ..................................................................................................... 6
Eye Diagram Parameters .......................................................................................................... 7
Receiver Impedance.................................................................................................................. 7
Transmitter Impedance.............................................................................................................. 7
PCIe Receiver Detection Support.............................................................................................. 8
Modes of Operation ................................................................................................................... 8
Channel Muxing......................................................................................................................... 9
Electrical Specifications ................................................................................................................... 13
Absolute Maximum Ratings ..................................................................................................... 13
Recommended Operating Conditions...................................................................................... 13
Power Consumption ................................................................................................................ 14
Package Thermal Considerations............................................................................................ 14
DC Specifications .................................................................................................................... 15
AC Specifications..................................................................................................................... 15
Pin Description................................................................................................................................. 20
Package Pinout — 36-QFN Signal Pinout ....................................................................................... 22
Pin Diagram ..................................................................................................................................... 23
QFN Package Dimension ................................................................................................................ 24
Revision History ............................................................................................................................... 25
Ordering Information........................................................................................................................ 26
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February 8, 2011
IDT 89HP0504PB Data Sheet
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February 8, 2011
IDT 89HP0504PB Data Sheet
Functional Description
The P0504PB has 4 channels, each with the individually programmable features listed below. Figure 3 diagrams the channel and Table 1
summarizes key configuration options.
Electrical Idle detection
with glitch filter
Channel power-down
Programmable equalizer
+
_
Input
termination
100 ohm
Programmable Transmitter
De-emphasis: 0 to -6.5dB
Voltage swing: 500mV to
950mV
0 to 14dB
Up to 10dB
Auto-boost
Output
termination
100 ohm
+
_
Receiver detection
Figure 3 Channel Block Diagram with Channel Features
Per-channel programmable features used at the Receive side.
–
Input equalization with 3 levels: 2 to 14dB compensation for high frequency signal attenuation due to cables and board traces. Additionally,
up to 10dB boost is added automatically by the equalizer for applications using long cables. The total equalization range is between 2dB and
24dB.
–
Input high impedance control via channel enable: disabled (active mode) and hi-Z (power-down).
Per-channel programmable features used at the Transmit side.
–
Output de-emphasis with 8 levels: 0 to -6.5dB. The de-emphasis boosts the magnitude of higher frequencies sent by the transmitter to
compensate for high frequency losses travelling through output side cable or output side board traces. This ensures that the final received
signal has a wider eye opening.
–
Output differential swing with 3 levels: 0.5V to 0.95V (peak-to-peak).
–
Receiver detection: enable or disable. This function is activated following an RSTB pulse.
•
With receiver detection enabled, if A0 and A1 channels do not detect at least one receiver, then the P0504PB on-chip Rx termination on
A0 and A1 is set to hi-Z as shown in Table 2.
•
With receiver detection enabled, if B0 and B1 channels do not detect at least one receiver, then the P0504PB on-chip Rx termination on
B0 and B1 is set to hi-Z as shown in Table 2.
–
Electrical idle detection: When the incoming differential peak-peak amplitude falls below 110mV, the device enters electrical idle mode and
the corresponding transmitter stops toggling, maintains its common mode voltage level, and meets all electrical idle specifications described
in the AC Specifications section of this data sheet.
In addition, the device contains global configuration of the data path:
–
Transfer modes: direct connect, cross-connect, multicast.
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February 8, 2011
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