MAX3980 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – 3.125Gbps XAUI Quad Equalizer

19-2153; Rev 3; 12/08
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3.125Gbps XAUI Quad Equalizer
General Description
The MAX3980 quad equalizer provides compensation
for transmission medium losses for four “lanes” 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 FR-4 board
material.
The equalizer has 100Ω 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^SM (2.5Gbps)
Features
♦ Four Differential Digital Data “Lanes” at
3.125Gbps
♦ Spans 40in (1.0m) of FR-4 PC Board
♦ Receiver Equalization Reduces Intersymbol
Interference (ISI)
♦ Low-Power, 175mW per Channel
♦ Standby Mode—Power-Down State
♦ Single +3.3V Supply
♦ Signal Detect
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3980UGH
0°C to +85°C
44 QFN-EP*
MAX3980UTH+
0°C to +85°C
44 TQFN-EP*
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
LINE CARD
PMD
MAC
Rx Tx ⁴
Rx
Tx
10GbE
4x
3.125Gbps
4 x 3.125Gbps
≤ 40in (1.0m)
4
+3.3V
SUPPLY
4
Tx Rx
4
Tx Rx
OUT
IN
MAX3980
PC BOARD
BACKPLANE
SWITCH CARD
4
IN
OUT
MAX3980
+3.3V
SUPPLY
4
≤ 40in (1.0m)
SWITCH
Rx
Tx
InfiniBand is a trademark and service mark of the InfiniBand Trade Association.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.