SN65LVPE502A Datasheet, PDF (11/29 Pages) Texas Instruments – Dual Channel USB3.0 Redriver/Equalizer

SN65LVPE502A
www.ti.com
SLLSEB3A – MARCH 2012 – REVISED APRIL 2012
Electrical Idle Support
Electrical idle support is needed for low frequency periodic signaling (LFPS) used in USB 3.0 side band
communication. A link is in an electrical idle state when the TX± voltage is held at a steady constant value like
the common mode voltage. LVPE502CP detects an electrical idle state when RX± voltage at the device pin falls
below VRX_LFPS_DIFFp-p min. After detection of an idle state in a given channel the device asserts electrical
idle state in its corresponding TX. When RX± voltage exceeds VRX_LFPS_DIFFp-p max normal operation is
restored and output start passing input signal. Electrical idle exit and entry time is speccified at < 6ns.
TYPICAL EYE DIAGRAM AND PERFORMANCE CURVES
Measurement equipment details:
• Generator (source) LeCroy PERT3,
• Signal: 5Gbps, 1000mVp-p, 3.5 dB De-Emphasis
• Tj and Dj measurements based on CP0 (USB 3 compliance pattern) which is D0.0 or logical idle with SKP
sequences removed
• Rj measurements based on CP1 or D10.2 symbol containing alternating 0s and 1s at Nyquist frequency
• Oscilloscope (Sink) LeCroy 25GHz Real Time Oscilloscope
• LeCroy QualiPHY software used to measure jitter and collect compliance eye diagrams
Device Operating Conditions: VCC = 3.3 V, Temp = 25°C, EQx/DEx/OSx set to their default value when not
mentioned
Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s): SN65LVPE502A
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