DS50PCI402EVK/NOPB National Semiconductor, DS50PCI402EVK/NOPB Datasheet - Page 7

• Manufacturer Part Number: DS50PCI402EVK/NOPB
• Description: BOARD EVALUATION DS50PCI402
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of DS50PCI402EVK/NOPB

• Main Purpose: Interface, Transceiver, PCI Express
• Embedded: No
• Utilized Ic / Part: DS50PCI402
• Primary Attributes: 5 Gbps Quad Lane Bidirectional Buffer & Equalizer
• Secondary Attributes: 3.3V LVCMOS Input Tolerant for SMBus Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DS50PC1402EVK/NOPB

The De-Emphasis level must be set when in SMBus
mode. See
for specific De-Emphasis values.
F=Float (don't drive pin - (each float pin has an internal 50K Ohm resistor to VDD and GND). Enhanced DE Pulse width provides
EQ1 EQ0
1
0
1
RATE
additional de-emphasis on second bit. VOD = Voltage Output Differential amplitude. When RATE is floated (F=Auto Rate
0/F
0/F
0/F
0/F
0/F
0/F
0/F
0/F
0/F
1/F
1/F
1/F
1/F
1/F
1/F
1/F
1/F
1/F
Detection Active) DE Level and Pulse Width settings follow detected RATE. RATE=0 is 2.5GBps, RATE=1 is 5 GBps
F
F
0
F=Float (don't drive pin, each float pin has an internal 50K Ohm resistor to VDD and GND), 1=High, 0=Low
SMBus TRANSACTIONS
DEM1 DEM0
GST
[1:0]
EQ Setting
11
11
11
11
11
11
11
11
F
F
F
F
F
F
0
0
1
1
0
1
0
0
1
1
0
1
[2:0]
BST
000
001
010
011
100
101
110
111
0
1
0
1
F
F
0
1
F
0
1
0
1
F
F
0
1
F
TABLE 4. De-Emphasis Input Select Pins for A and B ports (3–Level Input)
TABLE 3. Equalization Settings with GST=3 for Pins or SMBus Registers
Emphasis Level
Reserved, don't
Reserved, don't
1.25 GHz
Typical De-
10.4
12.4
15.2
18.1
19.6
20.2
6.4
8.5
-3.5dB
-3.5dB
-12dB
-12dB
-12dB
-12dB
-6dB
-6dB
-9dB
-9dB
-6dB
-6dB
-9dB
-9dB
0dB
0dB
use
use
EQ Gain (dB)
section and
2.5 GHz
Typical DE Pulse
400ps enhanced
400ps enhanced
400ps enhanced
400ps enhanced
400ps enhanced
200ps enhanced
200ps enhanced
200ps enhanced
200ps enhanced
200ps enhanced
12.2
15.6
18.3
21.3
25.0
27.2
28.8
30.7
Table 9
Width
400ps
400ps
200ps
200ps
0ps
0ps
7
30" FR4 (6-mil trace) or 7m (24 AWG) PCIe cable
Typical VOD
1000mV
1000mV
1000mV
1000mV
1000mV
1000mV
1200mV
1400mV
1000mV
1000mV
1000mV
1000mV
1000mV
1000mV
1200mV
1400mV
> 15m (24 AWG) PCIe cable
15m (24 AWG) PCIe cable
Suggested Use
8 inches FR4 (6-mil trace) or less than 1
meter (28 AWG) PCIe cable
15 inches FR4 (6-mil trace)
30 inches FR4 (6-mil trace)
40 inches FR4 (6-mil trace)
10 inches FR4 (6-mil trace)
20 inches FR4 (6-mil trace)
30 inches FR4 (6-mil trace)
Suggested Use
www.national.com