DS25BR440TSQ National Semiconductor, DS25BR440TSQ Datasheet - Page 11

• 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

Functional Description
The DS25BR440 is a 3.125 Gbps Quad LVDS buffer opti-
mized for high-speed signal routing and repeating over lossy
FR-4 printed circuit board backplanes and balanced cables.
The DS25BR440 has a pre-emphasis control pin for each
output for switching the transmit pre-emphasis to ON and
Transmit Pre-emphasis Truth Table
Transmit Pre-emphasis Level Selection for an Output OUTn
Receive Equalization Truth Table
Receive Equalization Level Selection for an Input INn
CONTROL Pin (PEn) State
CONTROL Pin (EQn) State
0
1
0
1
OUTPUT OUTn, n = {0, 1, 2, 3}
INPUT INn, n = {0, 1, 2, 3}
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OFF setting and an equalization control pin for each input for
switching the receive equalization to ON and OFF setting. The
following are the transmit pre-emphasis and receive equal-
ization truth tables.
Pre-emphasis Level
Equalization Level
OFF
OFF
ON
ON
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