19-2153; Rev 0; 9/01
IT
TION K
VALUA
E
BLE
AVAILA
3.125Gbps XAUI Quad Equalizer
General Description
Features
o
Four Differential Digital Data 鈥淟anes鈥?at
3.125Gbps
o
Spans 40in (1.0m) of FR4 PC Board
o
Receiver Equalization Reduces Intersymbol
Interference (ISI)
o
Low-Power, 175mW per Channel
o
Standby Mode鈥擯ower-Down State
o
Single +3.3V Supply
o
Signal Detect
MAX3980
The MAX3980 quad equalizer provides compensation
for transmission medium losses for four 鈥渓anes鈥?of digi-
tal NRZ data at a 3.125Gbps data rate in one package.
It is tailor-made for 10-Gigabit Ethernet (10GbE) back-
plane applications requiring attenuation of noise and jit-
ter that occur in communicating from MAC to PMD or
from MAC to Switch. In support of the IEEE-802.3ae for
the XAUI interface, the MAX3980 adaptively allows
XAUI lanes to reach up to 40in (1.0m) on FR4 board
material.
The equalizer has 100鈩?differential CML data inputs
and outputs.
The MAX3980 is available in a 44-pin exposed-pad
QFN package. The MAX3980 consumes only 700mW at
+3.3V or 175mW per channel.
Applications
IEEE-802.3ae XAUI Interface (3.125Gbps)
InfiniBand (2.5Gbps)
PART
MAX3980UGH
Ordering Information
TEMP. RANGE
0掳C to +85掳C
PIN-PACKAGE
44 QFN-EP*
*Exposed
pad
Pin Configuration appears at end of data sheet.
Typical Application Circuit
LINE CARD
PC BOARD
BACKPLANE
PMD
MAC
鈮?/div>
40in (1.0m)
Rx
Tx
4
Rx
Tx
4 x 3.125Gbps
10GbE
4x
3.125Gbps
4
4
+3.3V
SUPPLY
4
IN
OUT
4
Rx
SWITCH
SWITCH CARD
MAX3980
+3.3V
SUPPLY
Tx
Rx
Tx
Rx
OUT
MAX3980
IN
鈮?/div>
40in (1.0m)
4
Tx
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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