QLX4300-S45 Ver la hoja de datos (PDF) - Intersil
Número de pieza
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QLX4300-S45 Datasheet PDF : 21 Pages
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QLx4300-S45
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
CLK Setup Time
tSCK From the falling edge of ENB
DI Setup Time
tSDI Prior to the rising edge of CLK
DI Hold Time
tHDI From the rising edge of CLK
ENB ‘HIGH’
tHEN From the falling edge of the last data bit’s CLK
Boost Setting Operational
tD
From ENB ‘HIGH’
DO Hold Time
tCQ
From the rising edge of CLK to DO transition
Clock Rate
fCLK Reference clock for serial bus EQ programming
MIN
10
10
6
10
12
TYP
MAX UNITS
ns
ns
ns
ns
10
ns
ns
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.
Pattern
Generator
SMA
Adapter
Card
100OΩ Twin-Axial
Cable
SMA
Adapter
Card
QLx4300-S45
Eval Board
FIGURE 1. DEVICE CHARACTERIZATION TEST SETUP
Oscilloscope
TEST CHANNEL LOSS CHARACTERISTICS
0
-5
-10
-15
-20
-25
-30
10m
-35
15m
-40
20m
-45
25m
-50
0
1
2
3
4
5
6
Frequency (GHz)
FIGURE 2. 26 AWG TWIN-AXIAL CABLE LOSS AS A FUNCTION OF FREQUENCY FOR VARIOUS TEST CHANNELS
7
FN6982.1
November 19, 2009
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