DS80PCI102_15 Datasheet, PDF (1/46 Pages) Texas Instruments – 2.5-Gbps / 5.0-Gbps / 8.0-Gbps 1-Lane PCI-Express Repeater With Equalization and De-Emphasis

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DS80PCI102
SNLS344G – JULY 2011 – REVISED AUGUST 2015
DS80PCI102 2.5-Gbps / 5.0-Gbps / 8.0-Gbps 1-Lane PCI-Express™
Repeater With Equalization and De-Emphasis
1 Features
•1 Comprehensive Family, Proven System
Interoperability
– DS80PCI102: x1 PCIe
Gen-1, Gen-2, and Gen-3
– DS80PCI402: x4 PCIe
Gen-1, Gen-2, and Gen-3
– DS80PCI800: x8/x16 PCIe
Gen-1, Gen-2, and Gen-3
• Automatic Rate-Detect and Adaptation to
Gen-1, Gen-2, and Gen-3 Speeds
• Seamless Support for Gen-3 Transmit FIR
Handshake
• Receiver EQ (up to 36 dB), Transmit De-
Emphasis (up to -12 dB)
• Adjustable Transmit VOD: 0.7 to 1.3 Vp-p (Pin
Mode)
• 0.2 UI of Residual Deterministic Jitter at 8 Gbps
After 40 Inches of FR4 or 10 m 30-awg PCIe
Cable
• Low Power Dissipation With Ability to Turn Off
Unused Channels: 65 mW/Channel
• Automatic Receiver Detect (Hot-Plug)
• Multiple Configuration Modes: Pins/SMBus/Direct-
EEPROM Load
• Flow-Thru Pinout in 4-mm × 4-mm 24-Pin
Leadless WQFN Package
• Single Supply Voltage: 2.5 V or 3.3 V (Selectable)
• ±5-kV HBM ESD Rating
• −40°C to 85°C Operating Temperature Range
Typical Application Block Diagram
2 Applications
PCI Express Gen-1, Gen-2, and Gen-3
3 Description
The DS80PCI102 is a low-power, 1-lane repeater
with 4-stage input equalization, and an output de-
emphasis driver to enhance the reach of PCI-Express
serial links in board-to-board or cable interconnects.
The device is ideal for x1 PCI-Express configuration,
and it automatically detects and adapts to Gen-1,
Gen-2, and Gen-3 data rates for easy system
upgrade.
DS80PCI102 offers programmable transmit de-
emphasis (up to 12 dB), transmit VOD (up to
1300 mVp-p), and receive equalization (up to 36 dB)
to enable longer distance transmission in lossy
copper cables (10 meters or more), or backplanes
(40 inches or more) with multiple connectors. The
receiver can open an input eye that is completely
closed due to inter-symbol interference (ISI)
introduced by the interconnect medium.
The programmable settings can be applied easily
through pins or software (SMBus/I²C), or can be
loaded through an external EEPROM. When
operating in the EEPROM mode, the configuration
information is automatically loaded on power up,
which eliminates the need for an external
microprocessor or software driver.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DS80PCI102
WQFN (24)
4.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic Diagram
4
TX
PCIe
Connector
4
RX
DS80PCI102
Add-in Card
End Point
System Board
Root Complex
4
RX
PCIe
Connector
4
TX
DS80PCI102
BoTarardce
1
DS80PCI102
Address straps
(pull-up to VIN or
pull-down to GND)⁽¹⁾
SMBus Slave Mode⁽¹⁾
SMBus Slave Mode⁽¹⁾
3.3V⁽³⁾
From PCIe
PRSNT signal
10F 1F
0.1F (x2)
OUTA+
OUTA-
INB+
INB-
AD0
AD1
AD2
AD3
ALL_DONE
READ_EN
PRSNT
VIN (3.3 V)
VDD_SEL
VDD (2.5 V)
INA+
INA-
OUTB-
OUTB+
RXDET
RATE
SD_TH
ENSMB
SDA⁽²⁾
SCL⁽²⁾
GND (DAP)
VIN
SMBus Slave Mode⁽¹⁾
To SMBus/I2C
Host Controller
(1) Schematic shows connection for SMBus Slave Mode (ENSMB=1k to VDD)
For SMBus Master Mode or Pin Mode configuration, the connections are different.
(2) SMBus signals need to be pulled up elsewhere in the system.
(3) Schematic requires different connections for 2.5 V mode.
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.