DS25BR440TSQ National Semiconductor, DS25BR440TSQ Datasheet - Page 10

• Manufacturer Part Number: DS25BR440TSQ
• Manufacturer: National Semiconductor

Specifications of DS25BR440TSQ

• Number Of Elements: 4
• Number Of Receivers: 4
• Number Of Drivers: 4
• Input Type: CMOS
• Operating Supply Voltage (typ): 3.3V
• Differential Input High Threshold Voltage: 100mV
• Diff. Input Low Threshold Volt: -100mV
• Output Type: Repeater
• Differential Output Voltage: 450mV
• Transmission Data Rate: 3125Mbps
• Propagation Delay Time: 0.6ns
• Power Dissipation: 2.44W
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 40
• Lead Free Status / Rohs Status: Not Compliant

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Test Channel Loss Characteristics
The test channel was fabricated with Polyclad PCL-FR-370-
Laminate/PCL-FRP-370 Prepreg materials (Dielectric con-
stant of 3.7 and Loss Tangent of 0.02). The edge coupled
differential striplines have the following geometries: Trace
Width (W) = 5 mils, Gap (S) = 5 mils, Height (B) = 16 mils.
Test Channel
A
B
C
D
E
F
(inches)
Length
10
20
30
15
30
60
FIGURE 8. Pre-emphasis and Equalization Performance Test Circuit
500 MHz
-1.2
-2.6
-4.3
-1.6
-3.4
-7.8
FIGURE 9. Test Channel Block Diagram
750 MHz
-10.3
-1.7
-3.5
-5.7
-2.2
-4.5
10
1000 MHz
-12.4
Insertion Loss (dB)
-2.0
-4.1
-7.0
-2.7
-5.6
30007328
1250 MHz
-14.5
-2.4
-4.8
-8.2
-3.2
-6.6
1500 MHz
-16.6
-2.7
-5.5
-9.4
-3.7
-7.7
1560 MHz
-17.0
-2.8
-5.6
-9.7
-3.8
-7.9
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