MAXIM MAX3980 3.125Gbps XAUI Quad Equalizer Data Sheet
Summary
The MAX3980 is a quad equalizer designed for high-speed data transmission in 10 Gigabit Ethernet (10GbE) backplane applications. It compensates for signal loss, noise, and jitter across four differential lanes over distances up to 40 inches on FR-4 boards. This comprehensive manual provides critical technical details, including electrical specifications, performance parameters, packaging options, and application circuitry, making it essential documentation for hardware engineers designing networking equipment like switch cards or line cards.
Page 1 Text Content
19-2153; Rev 3; 12/08
EVALUATION KIT AVAILABLE 3.125Gbps XAUI Quad Equalizer
General Description Features
The MAX3980 quad equalizer provides compensation Four Differential Digital Data “Lanes” at for transmission medium losses for four “lanes” of digi-
3.125Gbps
tal NRZ data at a 3.125Gbps data rate in one package.
It is tailor-made for 10-Gigabit Ethernet (10Gb E) back- Spans 40in (1.0m) of FR-4 PC Board
plane applications requiring attenuation of noise and jit-
Receiver Equalization Reduces Intersymbol
ter that occur in communicating from MAC to PMD or
Interference (ISI)
from MAC to Switch. In support of the IEEE-802.3ae for
the XAUI interface, the MAX3980 adaptively allows Low-Power, 175m W per Channel
XAUI lanes to reach up to 40in (1.0m) on FR-4 board
Standby Mode—Power-Down State
material.
Single +3.3V Supply
The equalizer has 100Ω differential CML data inputs and outputs. Signal Detect The MAX3980 is available in a 44-pin exposed-pad QFN package. The MAX3980 consumes only 700m W at Ordering Information +3.3V or 175m W per channel.
PART TEMP RANGE PIN-PACKAGE
Applications MAX3980UGH 0°C to +85°C 44 QFN-EP*
IEEE-802.3ae XAUI Interface (3.125Gbps) MAX3980UTH+ 0°C to +85°C 44 TQFN-EP* +Denotes a lead-free/Ro HS-compliant package.
Infini Band SM (2.5Gbps)
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
LINE CARD SWITCH CARD
PC BOARD BACKPLANE
PMD MAC SWITCH
≤ 40in (1.0m)
Rx Tx Rx Tx IN OUT Rx
4 x 3.125Gbps MAX3980
10Gb E
3.125Gbps SUPPLY +3.3V
SUPPLY
Tx Rx Tx Rx OUT IN Tx
MAX3980
≤ 40in (1.0m)
Infini Band is a trademark and service mark of the Infini Band Trade Association.
Maxim Integrated Products
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.
Page Summary Contents For MAXIM MAX3980 3.125Gbps XAUI Quad Equalizer Data Sheet
Manual Details
| Brand | QUAD |
|---|---|
| Pages | 9 |
| File Size | 441.11 KB |
| Published | May 27, 2026 |
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Frequently Asked Questions
What type of application does the MAX3980 support?
It is tailored for 10-Gigabit Ethernet (10GbE) backplane applications.
How far can the equalizer span on an FR-4 board?
The XAUI interface allows lanes to reach up to 40in (1.0m) on an FR-4 board.
What is the primary function of the MAX3980 equalizer?
It provides signal equalization and reduces Inter-Symbol Interference (ISI).
How much power does the MAX3980 consume under normal operation?
The device consumes only 700mW at +3.3V, or 175mW per channel.
What voltage supply is required for the device?
It operates using a single +3.3V supply.