DS80PCI800 Datasheet, PDF (9/39 Pages) Texas Instruments – 2.5 Gbps / 5.0 Gbps / 8.0 Gbps 8 Channel PCI Express Repeater with Equalization and De-Emphasis

Symbol
Parameter
Conditions
Min
Equalization
DJE1
Residual deterministic
jitter at 8 Gbps
35” 4mils FR4,
VID = 0.8 Vp-p,
PRBS15, EQ = 1F'h,
DEM = 0 dB
DJE2
Residual deterministic
jitter at 5 Gbps
35” 4mils FR4,
VID = 0.8 Vp-p,
PRBS15,EQ = 1F'h,
DEM = 0 dB
DJE3
Residual deterministic
jitter at 2.5 Gbps
35” 4mils FR4,
VID = 0.8 Vp-p,
PRBS15, EQ = 1F'h,
DEM = 0 dB
DJE4
Residual deterministic
jitter at 8 Gbps
10 meters 30 awg cable,
VID = 0.8 Vp-p,
PRBS15, EQ = 2F'h,
DEM = 0 dB
DJE5
Residual deterministic
jitter at 5 Gbps
10 meters 30 awg cable,
VID = 0.8 Vp-p,
PRBS15, EQ = 2F'h,
DEM = 0 dB
DJE6
Residual deterministic
jitter at 2.5 Gbps
10 meters 30 awg cable,
VID = 0.8 Vp-p,
PRBS15, EQ = 2F'h,
DEM = 0 dB
De-emphasis (GEN 1,2 mode only)
DJD1
Residual deterministic
jitter at 2.5 Gbps and
5.0 Gbps
10” 4mils FR4,
VID = 0.8 Vp-p,
PRBS15, EQ = 00,
VOD = 1.0 Vp-p,
DEM = −3.5 dB
DJD2
Residual deterministic
jitter at 2.5 Gbps and
5.0 Gbps
20” 4mils FR4,
VID = 0.8 Vp-p,
PRBS15, EQ = 00,
VOD = 1.0 Vp-p,
DEM = −9 dB
Typ
Max
Units
0.14
UI
0.1
UI
0.05
UI
0.16
UI
0.1
UI
0.05
UI
0.1
UI
0.1
UI
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the
device should not be operated beyond such conditions. Absolute Maximum Numbers are guaranteed for a junction temperature range of -40°C to +125°C. Models
are validated to Maximum Operating Voltages only.
Note 2: Typical values represent most likely parametric norms at VDD = 2.5V, TA = 25°C., and at the Recommended Operation Conditions at the time of product
characterization and are not guaranteed.
Note 3: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified
or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.
Note 4: Allowed supply noise (mVp-p sine wave) under typical conditions.
Note 5: Guaranteed by device characterization.
Note 6: Propagation Delay measurements will change slightly based on the level of EQ selected. EQ = 00 will result in the shortest propagation delays.
Note 7: In GEN3 mode, the output VOD level is not fixed. It will be adjusted automatically based on the VID input amplitude level. The output VOD level set by
DEMA/B[1:0] in GEN3 mode is dependent on the VID level and the frequency content. The DS80PCI800 repeater in GEN3 mode is designed to be transparent,
so the TX-FIR (de-emphasis) is passed to the RX to support the PCIe GEN3 handshake negotiation link training.
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