MAX3981 Maxim Integrated Products, MAX3981 Datasheet
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MAX3981
Manufacturer Part Number
MAX3981
Description
XAUI Quad Cable Equalizer
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX3981.pdf
(9 pages)
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Part Number:
MAX3981UTH
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The MAX3981 quad equalizer provides compensation
for transmission medium losses for four “lanes” of digi-
tal NRZ data at a data rate of 3.125Gbps in one
package. It is tailor-made for 10Gigabit Ethernet appli-
cations that require attenuation of noise and jitter that
occur in communicating with chassis-to-chassis inter-
connect. In support of IEEE-802.3ae for the XAUI inter-
face, the MAX3981 adaptively allows XAUI lanes to
reach 10m (33ft) with inexpensive twin-axial cable for
extended backplane applications.
The equalizer has 100Ω differential CML data inputs
and outputs.
The MAX3981 is available in a 44-pin exposed-pad
QFN package. The MAX3981 consumes only 700mW at
3.3V or 175mW per channel.
21-2178; Rev 1; 5/03
Pin Configuration appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
10GbE
IEEE–802.3ae XAUI Interface (3.125Gbps)
InfiniBand (2.5Gbps)
Rx
Tx
PMD
Rx
Tx
________________________________________________________________ Maxim Integrated Products
4
4
3.125Gbps XAUI Quad Cable Equalizer
General Description
LINE CARD
Rx
Tx
MAC
Rx
Tx
Applications
4
4 x 3.125Gbps
OUT
MAX3981
SUPPLY
3.3V
4
IN
♦ Four Differential Digital Data “Lanes” at
♦ Span 10m (33ft) of Twin-Axial Cable
♦ Receiver Equalization Reduces Intersymbol
♦ Low Power, 175mW per Channel
♦ Standby Mode—Power-Down State
♦ Single 3.3V Supply
♦ Signal Detect
M AX 3981U GH
TWIN-AX CABLE
10m (33ft)100Ω
3.125Gbps
Interference (ISI)
PART
Typical Operating Circuit
0°C to + 85°C
IN
RANGE
TEMP
Ordering Information
MAX3981
SUPPLY
3.3V
SWITCH CARD
4
PIN-
PACKAGE
44 QFN
OUT
4
Features
PACKAGE
CODE
G4477-1
Rx
Tx
SWITCH
1