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Part Number: SN75LVCP601
My customer has a question about input equalizer characteristics of SN75LVCP601.I do not have an evaluation board and measurement environment.Please answer the question from me.
Data sheet of SN76LVCP601 Conditions in Figure 11 and Figure 12 on page 12: Case 1 at 6 Gbps EQ = 14 dB DE = –2 dB TP2 Eye Amplitude 240mV (Figure 11. Test Point 2) TP3 Eye Amplitude 788.8mV (Figure 12. Test Point 3)
Question :When the above conditions is changed to EQ = 0dB and DE = 0dB, How is the voltage value at TP3?I believe that the same voltage as the 240mV of TP2 will be outputted in my expectation.
Best Regards,Hiroaki Masumoto
The output voltage at TP3 will still be approximately 750 - 800 mV. The open eye portion of the waveform will be much smaller. Since the CTLE setting is at 0 dB, the ISI present on the input will be retransmitted at the output. Even with the linear equalizer portion of the circuit set to 0 dB, the internal LVCP601 datapath has enough widebandwith gain to achieve full output amplitude.
In reply to Lee Sledjeski:
Thank you for your reply.I understood and will inform our customer of your information.
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