1 of 2 October 1, 2010
2010 Integrated Device Technology, Inc.
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
®
Device Overview
The 89HT0808P (T0808P) is a Signal Retimer/Conditioner used to
improve signal integrity for enhancing system performance and reliability
across long PCB traces or cables. It removes both random and deter-
ministic jitter from the input signal eliminating inter-symbol interference,
and resets the output jitter budget. It provides eight differential, 8Gbps
PCIe Express® 3.0 channels, supporting up to 4 full lanes. The Retimer
also fully supports PCIe Express 5Gbps and 2.5Gbps features. The
T0808P is targeted to meet the high-performance needs of PCIe®
Gen 3/2/1 applications.
Applications
–Computing and Storage
–Consumer Electronics and Communications
Features
◆High Performance Retimer
–Eliminates random input jitter
–Eliminates deterministic ISI jitter
–Compensates for PCB trace and cable attenuations
–Performance and power tunable for each data rate
–Wide swing, transmit driver offers up to 8dB of transmit de-
emphasis to meet the needs of the most challenging of back-
planes
–Multi-stage equalizer: CTLE and 5 tap DFE
–Fast acquisition PLL for L0s exit
–SERDES Rx eye generation (on-chip)
◆PCIe Standards and Compatibility
–PCI Express Base Specification 3.0 compliant
–PCI Express Base Specification 2.1 compliant
◆Power Management
–Low power
–Supports the following optional PCI Express features
•L0s ASPM
•L1 ASPM
◆Hot Plug Support
◆SerDes Power Savings
–Supports low swing (half-swing) SerDes operation
–SerDes associated with unused lanes are placed in a low
power state automatically
◆Link Configurability
–Links can be configured with 1x4, 1x1, 2x1
–Automatic per port link width negotiation (e.g., a x4 port can
link train to x4 or x1)
–Per-lane SerDes configuration
•De-emphasis, receive equalization, drive strength
◆Clocking
–Uses standard 100 MHz PCIe reference clock
–SSCLK (Spread Spectrum Clocking) supported with common
clock configuration
–Non-SSCLK supported with common and non-common clock
configuration
◆I2C Interface
–Dedicated master interface
• External EEPROM configuration loading
–Dedicated slave interface
•Configuration loading
•Writing new or initial image into external EEPROM
•Expose internal global CSR space to system controller
◆Reliability, Availability and Serviceability (RAS)
–Physical layer error checking and accounting
–End-to-end data path parity protection
–Checksum Serial EEPROM content protected
◆Test and Debug
–Per link/lane error diagnostic registers
–All registers accessible from I2C or JTAG port
–SerDes test modes
–Supports IEEE 1149.6 AC JTAG and IEEE 1149.1 JTAG
–Several loopback modes
◆Packaged in a 9x9mm, 100-pin BGA, 0.8mm ball spacing
89HT0808P
Product Brief
8 Channel Signal Retimer for
8.0Gps, 5.0Gbps and 2.5Gbps PCIe®
2 of 2 October 1, 2010
IDT 89HT0808P Product Brief
August 16, 2004August 16, 200
NOT AN OFFER FOR SALE
The information presented herein is subject to a Non-Disclosure Agreement and is for planning purposes only. Nothing contained in this presenta-
tion, whether verbal or written, is intended as, or shall have the effect of, a sale or an offer for sale that creates a contractual power of acceptance.
CORPORATE HEADQUARTERS
6024 Silver Creek Valley Road
San Jose, CA 95138
for SALES:
800-345-7015 or 408-284-8200
fax: 408-284-2775
www.idt.com
for Tech Support:
email: siphelp@idt.com
phone: 408-284-8208
®
Applications
IDT’s Retimer products fit into server, storage, and blade products.
Improving Signal Integrity with IDT Retimers
Example Eye diagram FR4 and PRBS patterns
CPU CPU
QPI
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memory
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memory
memory
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PCIe
89HT0816P
Reti mer
89HT0808P
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IOH
PC I e S lo t wi th a
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89HT0816P
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89HT0808P
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Backplane
CPU CPU
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memory
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PCIe
89HT0816P
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89HT0808P
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PC I e S lo t wi th a
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89HT0816P
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89HT0808P
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Backplane
No Retimer With IDT Retimer
