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TUSB551 Datasheet(PDF) 6 Page - Texas Instruments |
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TUSB551 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 23 page  TUSB551 SLLSEJ1A – MARCH 2014 – REVISED MARCH 2014 www.ti.com AC Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Differential Transmitter (TXP, TXN) OS = Low, DE=Low 1050 Transmitter differential voltage swing VTX-DIFF-PP mVpp (transition-bit)(1) OS = Floating, DE=Low 1200 VTX-DIFF- LFPS differential voltage swing OS = Low, Floating 800 1200 mVpp PP-LFPS DE = Low, OS = Floating 0 VTX-DE- Transmitter de-emphasis DE = Floating, OS = Floating –3 –3.5 –4 dB RATIO DE = High, OS = Floating –6 CTX TX input capacitance to GND At 2.5GHz 1.25 pF ZTX-DIFF Differential impedance of the driver 80 120 Ω Common-mode impedance of the Measured with respect to AC ground ZTX-CM 20 30 Ω driver over 0-500mV ITX-SC TX short circuit current TX+/- shorted to GND 60 mA Common-mode voltage bias in the VCM-TX 0.6 0.8 V transmitter (DC) AC common-mode voltage swing in VCM-TX-AC Within U0 and within LFPS 100 mVpp active mode VTX-IDLE- Differential voltage swing during Tested with a high-pass filter 0 10 mVpp DIFF -AC-PP electrical idle VTX-CM- Absolute delta of DC CM voltage 100 mV ΔU1-U0 during active and idle states VTX-IDLE- DC electrical idle differential output Voltage must be low pass filtered to 0 10 mV DIFF-DC voltage remove any AC component Voltage change to allow receiver Positive voltage to sense receiver Vdetect 600 mV detect termination (1) VTX-DIFF-PP is measured at the TX output with no load and no trace. 7.8 Timing Requirements/Timing Diagrams over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Apply 0V to VCC, connect Time from power applied until RX SuperSpeed termination to TX±, tREADY 52 ms termination apply 1.8V to VCC, and measure when ZRX-DIFF is enabled. Differential Transmitter (TXP, TXN) 20%-80% of differential voltage tr, tf Output rise/fall times (see Figure 3) measured 1 inch from the output 56 ps terminal 20%-80% of differential voltage tRF-MM Output rise/fall time mismatch measured 1 inch from the output 2.6 ps terminal 6 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Product Folder Links: TUSB551 |
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