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DS80PCI402 Datasheet(PDF) 8 Page - Texas Instruments |
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DS80PCI402 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 54 page DS80PCI402 SNLS324E – APRIL 2011 – REVISED JANUARY 2015 www.ti.com Electrical Characteristics (continued) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT HIGH-SPEED OUTPUTS VTX-DIFF-PP Output voltage differential swing Differential measurement with OUT_n+ 0.8 1.0 1.2 and OUT_n-, terminated by 50 Ω to GND, Vp-p AC-Coupled, VID = 1.0 Vp-p, DEM0 = 1, DEM1 = 0(1) VTX-DE- TX de-emphasis ratio VOD = 1.0 Vp-p, –3.5 RATIO_3.5 DEM0 = 0, DEM1 = R dB Gen 1 & 2 modes only VTX-DE-RATIO_6 TX de-emphasis ratio VOD = 1.0 Vp-p, –6 DEM0 = R, DEM1 = R dB Gen 1 & 2 modes only TTX-DJ Deterministic Jitter VID = 800 mV, PRBS15 pattern, 8.0 0.05 Gbps, VOD = 1.0 V, UIpp EQ = 00, DE = 0 dB (no input or output trace loss) TTX-RJ Random Jitter VID = 800 mV, 0101 pattern, 8.0 Gbps, 0.3 VOD = 1.0 V, ps RMS EQ = 00, DE = 0 dB, (no input or output trace loss) TTX-RISE-FALL TX rise/fall time 20% to 80% of differential output 35 45 ps voltage(2) TRF-MISMATCH TX rise/fall mismatch 20% to 80% of differential output 0.01 0.1 UI voltage(2) RLTX-DIFF TX differential return loss 0.05 to 1.25 GHz –16 dB 1.25 to 2.5 GHz –12 dB 2.5 to 4 GHz –11 dB RLTX-CM TX common mode return loss 0.05 to 2.5 GHz –12 dB 2.5 to 4 GHz –8 dB ZTX-DIFF-DC DC differential TX impedance 100 Ω VTX-CM-AC-PP TX AC peak-peak common VOD = 1.0 Vp-p, 100 mVp-p mode voltage DEM0 = 1, DEM1 = 0(2) ITX-SHORT TX short circuit current limit Total current the transmitter can supply 20 mA when shorted to VDD or GND VTX-CM-DC- Absolute delta of DC common (2) 100 ACTIVE-IDLE- mode voltage during L0 and mV DELTA electrical idle VTX-CM-DC-LINE- Absolute delta of DC common (2) 25 DELTA mode voltgae between TX+ and mV TX- TTX-IDLE-DATA Max time to transition to VID = 1.0 Vp-p, 8 Gbps 3.5 differential DATA signal after ns IDLE TTX-DATA-IDLE Max time to transition to IDLE VID = 1.0 Vp-p, 8 Gbps 6.2 ns after differential DATA signal TPLHD/PHLD High-to-low and low-to-high EQ = 00(3) 200 ps differential propagation delay TLSK Lane-to-lane skew T = 25° C, VDD = 2.5 V 25 ps TPPSK Part-to-part propagation delay T = 25° C, VDD = 2.5 V 40 ps skew (1) 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 DS80PCI402 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. (2) Parameter is characterized but not tested in production. (3) Propagation delay measurements will change slightly based on the level of EQ selected. EQ = 00 will result in the largest propagation delays. 8 Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated Product Folder Links: DS80PCI402 |
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