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DS125BR800A Datasheet(PDF) 7 Page - Texas Instruments |
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DS125BR800A Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 54 page  DS125BR800A www.ti.com SNLS467 – NOVEMBER 2013 Electrical Characteristics (1)(2)(3) (continued) Symbol Parameter Test Conditions Min Typ Max Unit Vil Low Level Input Voltage 0 0.8 V Voh High Level Output Voltage Ioh= −4mA 2.0 V (ALL_DONE pin) Vol Low Level Output Voltage Iol= 4mA 0.4 V (ALL_DONE pin) Iih Input High Current (PWDN pin) VIN = 3.6 V (pin 24), -15 +15 uA Input under test = 3.6 V Input High Current with internal +20 +150 uA resistors (4–level input pin) Iil Input Low Current (PWDN pin) VIN = 3.6 V (pin 24), -15 +15 uA Input under test = 0 V Input Low Current with internal -160 -40 uA resistors (4–level input pin) CML Receiver Inputs (IN_n+, IN_n-) RLrx-diff RX Differential return loss 0.05 - 7.5 GHz -15 dB 7.5 - 15 GHz -5 dB RLrx-cm RX Common mode return loss 0.05 - 5 GHz -10 dB Zrx-dc RX DC common mode impedance Tested at VDD = 2.5 V 40 50 60 Ω Zrx-diff-dc RX DC differntial mode impedance Tested at VDD = 2.5 V 80 100 120 Ω Vrx-diff-dc Differential RX peak to peak voltage Tested at pins 0.6 1.0 1.2 V (VID) Vrx-signal-det-diff-pp Signal detect assert level for active SD_TH = float, 50 mVp-p data signal 0101 pattern at 12 Gbps Vrx-idle-det-diff-pp Signal detect de-assert level for SD_TH = float, 37 mVp-p electrical idle 0101 pattern at 12 Gbps High Speed Outputs Vtx-diff-pp Output Voltage Differential Swing Differential measurement with 0.8 1.0 1.2 Vp-p OUT_n+ and OUT_n-, terminated by 50 Ω to GND, AC-Coupled, VID = 1.0 Vp-p, DEM0 = 1, DEM1 = 0(4) Vtx-de-ratio_3.5 TX de-emphasis ratio VOD = 1.0 Vp-p, -3.5 dB DEM0 = 0, DEM1 = R, Gen 1 and 2 modes only Vtx-de-ratio_6 TX de-emphasis ratio VOD = 1.0 Vp-p, -6 dB DEM0 = R, DEM1 = R Gen1 and 2 modes only TTX-HF-DJ-DD TX Dj > 1.5 MHz 0.15 UI TTX-LF-RMS TX RMS jitter < 1.5 MHz 3.0 ps RMS TTX-RISE-FALL TX rise/fall time 20% to 80% of differential output 35 45 ps voltage TRF-MISMATCH TX rise/fall mismatch 20% to 80% of differential output 0.01 0.1 UI voltage RLTX-DIFF TX Differential return loss 0.05 - 7.5 GHz -15 dB 7.5 - 15 GHz -5 dB RLTX-CM TX Common mode return loss 0.05 - 5 GHz -10 dB ZTX-DIFF-DC DC differential TX impedance 100 Ω VTX-CM-AC-PP TX AC peak-peak common mode VOD = 1.0 Vp-p, 100 mVpp voltage DEM0 = 1, DEM1 = 0 ITX-SHORT TX short circuit current limit Total current the transmitter can 20 mA supply when shorted to VDD or GND (4) In SAS3 and 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] is dependent on the VID level and the frequency content. The DS125BR800A repeater in SAS3 and GEN3 mode is designed to be transparent, so the TX-FIR (de-emphasis) is passed to the RX to support link training. Copyright © 2013 , Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: DS125BR800A |
Similar Part No. - DS125BR800A_14 |
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Similar Description - DS125BR800A_14 |
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