MAX3785

6.25Gbps, 1.8V PC Board Equalizer

Industry's Smallest Backplane Equalizer Measures Only 1.5mm x 1.5mm

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Status Explanations for product status codes

Part Number Status
MAX3785 Active: In Production. See Ordering Information for details.

Description

The MAX3785 6.25Gbps equalizer operates from a single 1.8V supply and compensates for transmission-medium losses encountered with FR-4 transmission lines. Optimized for low-voltage, high-density, DC-coupled interconnections between the line card and switch card, the MAX3785 enables a system upgrade path while maintaining a legacy rate of 2.5Gbps to 3.125Gbps. Roughly the size of two 0603 passive components, the MAX3785 easily provides placement and routing flexibility.

The MAX3785 is composed of an equalizer, limiting amplifier, and output driver. For data rates of 3.2Gbps and lower, the MAX3785 equalizes signals for spans up to 40in of FR-4 board material. For data rates up to 6.25Gbps, the MAX3785 compensates for 30in of FR-4 board material. The MAX3785 is coding independent, functioning equally well for 8b/10b or scrambled signals.

The MAX3785 features DC-coupled current-mode logic (CML) data inputs and outputs. It is packaged in a tiny 1.5mm x 1.5mm chip-scale package (UCSP™) and a 6-pin TDFN package.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 4 (PDF, 372kB)
Send this datasheet to any email addressE-Mail
An evaluation kit is available: MAX3785EVKIT MAX3785UTTEVKIT

Key Features

  • Single 1.8V Supply
  • Very Low Power, 60mW
  • Spans 30in with FR-4 at 6.25Gbps
  • Operates from 1.0Gbps to 6.4Gbps
  • Coding Independent, 8b/10b or Scrambled
  • DC-Coupled CML Inputs and Outputs
  • Small 1.5mm x 1.5mm Footprint
 

Applications/Uses

  • Double IEEE 802.3ae XAUI
  • Double STM-16/OC-48
  • HSBI for ≤ 6.4Gbps
   

Key Specifications:

Equalizers (Cable and Circuit Board)
Part Number Applications Data Rate
(Mbps)
Data Rate
(Mbps)
Max. Reach @ Max. Data Rate VSUPPLY
(V)
I/O Type Channels Rx Eq. @ Max. Rate
(dB)
Package/Pins Smallest Available Pckg.
(mm2)
Oper. Temp.
(°C)
min max typ max w/pins
MAX3785 
Copper Cable Interconnect
Ethernet
Fibre Channel
Printed Circuit Board Interconnect
SDH/ SONET/ DWDM/ ATM/ PONs
XAUI
1000 6400 0.8m FR4 1.8 CML 1 15
TDFN-EP/6
UCSP/6
WLP/6
2.6
-20 to +85
0 to +85
See All Equalizers (Cable and Circuit Board) (21)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Diagram

MAX3785: Typical Application Circuit
Typical Application Circuit

More Information

Topmark Coding MAX3785
New Product Press Release 2002-11-26 ]

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Information Index

Document Ref.: 19-2630 Rev 4; 2008-10-22
This page last modified: 2009-01-13




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