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QLX4300SIQSR Datasheet(PDF) 7 Page - Intersil Corporation |
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QLX4300SIQSR Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 21 page 7 FN6982.1 November 19, 2009 NOTES: (Continued) 10. During line silence, transmitter noise in excess of this voltage range may result in differential output amplitudes from the QLx4300-S45 that are greater than 20mVP-P. 11. The data pattern preceding line silence mode is comprised of the PCIe electrical idle ordered set (EIOS). The data pattern following line silence mode is comprised of the PCIe electrical idle exit sequence (EIES). 12. The data pattern preceding or following line silence mode is comprised of the SAS-2 ALIGN (0) sequence for OOB signaling at 3.125Gb/s, and amplitude of 800mVP-P. Serial Bus Timing Characteristics PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS CLK Setup Time tSCK From the falling edge of ENB 10 ns DI Setup Time tSDI Prior to the rising edge of CLK 10 ns DI Hold Time tHDI From the rising edge of CLK 6 ns ENB ‘HIGH’ tHEN From the falling edge of the last data bit’s CLK 10 ns Boost Setting Operational tD From ENB ‘HIGH’ 10 ns DO Hold Time tCQ From the rising edge of CLK to DO transition 12 ns Clock Rate fCLK Reference clock for serial bus EQ programming 20 MHz Typical Performance Characteristics VDD = 1.2V, TA = +25°C, unless otherwise noted. Performance was characterized using the system testbed shown in Figure 1. Unless otherwise noted, the transmitter generated a non-return-to-zero (NRZ) PRBS-7 sequence at 800mVP-P (differential) with 10ps of peak-to-peak deterministic jitter. This transmit signal was launched into twin-axial cable test channels of varying gauges and lengths. The loss characteristics of these test channels are plotted as a function of frequency in Figure 2. The received signal at the output of these test channels was then processed by the QLx4300-S45 before being passed to a receiver. Eye diagram measurements were made with 4000 waveform acquisitions and include random jitter. FIGURE 1. DEVICE CHARACTERIZATION TEST SETUP FIGURE 2. 26 AWG TWIN-AXIAL CABLE LOSS AS A FUNCTION OF FREQUENCY FOR VARIOUS TEST CHANNELS Pattern Generator SMA Adapter Card 100O Twin-Axial Cable SMA Adapter Card QLx4300-S45 Eval Board Oscilloscope Ω TEST CHANNEL LOSS CHARACTERISTICS -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 01234 56 Frequency (GHz) 10m 15m 20m 25m QLx4300-S45 |
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