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LMKDB1108FS85RKPR Scheda tecnica(PDF) 21 Page - Texas Instruments |
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LMKDB1108FS85RKPR Scheda tecnica(HTML) 21 Page - Texas Instruments |
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21 / 126 page  6.5 Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Vmin Output voltage low including undershoot PCIe AC test load(1) –100 100 mV VOH Output voltage high PCIe AC test load(1) 670 820 mV VOL Output voltage low PCIe AC test load(1) –100 100 mV Zdiff Differential output DC impedance VDD = 3.3 V 95 100 105 Ω VDD = 1.8 V 95 100 105 Ω dV/dt Output slew rate Measured from –150 mV to +150 mV on the differential waveform. Lowest slew rate(1) (7) 1.5 2.2 V/ns Measured from –150 mV to +150 mV on the differential waveform. Low slew rate(1) (7) 1.8 2.6 V/ns Measured from –150 mV to +150 mV on the differential waveform. High slew rate(1) (7) 2 2.9 V/ns Measured from –150 mV to +150 mV on the differential waveform. Highest slew rate(1) (7) 2.4 4 V/ns ∆dV/dt Rising edge rate to falling edge rate matching PCIe AC test load(1) 10 % DCD Duty cycle distortion Measured on the differential waveform. Input duty cycle = 50%(1) –1 1 % Vcross Absolute crossing point voltage PCIe AC test load(1) 250 550 mV ∆Vcross Variation of Vcross over all clock edges PCIe AC test load(1) 140 mV |VRB| Absolute value of ring back voltage as defined in PCIe PCIe AC test load(1) 100 mV tstable Time before VRB is allowed PCIe AC test load(1) 500 ps CLOCK OUTPUT CHARACTERISTICS - non-PCIe VOH Output voltage high Output swing programmed to 800 mV. f0 = 156.25 MHz or 312.5 MHz 720 880 mV VOL Output voltage low –120 120 mV VOH Output voltage high Output swing programmed to 900 mV. f0 = 156.25 MHz or 312.5 MHz 780 980 mV VOL Output voltage low –120 120 mV tR, tF Rise/fall time on single-ended waveform, 20% to 80% Output swing programmed to 800 mV. Fastest slew rate. f0 = 156.25 MHz or 312.5 MHz 340 ps Output swing programmed to 900 mV. Fastest slew rate. f0 = 156.25 MHz or 312.5 MHz 370 ps DCD Duty cycle distortion Input duty cycle = 50% –1 1 % CLOCK OUTPUT CHARACTERISTICS - 100 MHz 85 Ω PCIe (LMKDB1120FS, LMKDB1108FS, LMKDB1104FS) VOH,AC Output voltage high DB2000QL AC test load(6) 670 820 mV VOL,AC Output voltage low –100 100 mV Vmax,AC Output max voltage (including overshoot) 670 920 mV Vmin,AC Output min voltage (including undershoot) –100 100 mV VOH,DC Output voltage high with DC test load DB2000QL DC test load(2) 225 270 mV VOL,DC Output voltage low with DC test load 10 150 mV Vovs,DC Output overshoot voltage with DC test load 75 mV Vuds,DC Output undershoot voltage with DC test load –75 mV www.ti.com LMKDB1102, LMKDB1104, LMKDB1104FS LMKDB1108, LMKDB1108FS, LMKDB1112, LMKDB1120, LMKDB1120FS SNAS855F – NOVEMBER 2023 – REVISED NOVEMBER 2025 Copyright © 2025 Texas Instruments Incorporated Submit Document Feedback 21 Product Folder Links: LMKDB1102 LMKDB1104 LMKDB1104FS LMKDB1108 LMKDB1108FS LMKDB1112 LMKDB1120 LMKDB1120FS |
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