MAX3785

6.25Gbps, 1.8V PC Board Equalizer

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

 Overview   Technical Documents   Ordering Info   Related Products   User Comments (0)   All   


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

Application Notes

Application Note 1900   HFTA-06.0: Designing a Simple, Small, Wide-Band and Low-Power Equalizer for FR4 Copper Links
Application Note 3455   HFTA-11.0: Spectral Content of NRZ Test Patterns
Application Note 3834   HFTA-13.0: Designing External Cabling for Low EMI Radiation

Reliability Reports

Reliability Report: MAX3785.pdf
Show FIT data for:

Software/Models

MAX3785UBL IBIS Model
MAX3785UBL SPICE Input/Output Model
MAX3785UTT SPICE Input/Output Model

Ordering Information

Filters: Part Number: Package: Temperature: Tape and Reel Sample
Part Number Free
Sample
Buy Status Explanations for product status codes Recommended Replacement Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX3785ITT+T    
Active   TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX3785ITT-T    
Active   TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX3785UBL+T     N/A No Longer Available MAX3785UWL+T

 
UCSP;6 pin;2.5 mm²
Outline Drawing:21-0093 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B9+3*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX3785UBL-T    
Active   UCSP;6 pin;2.5 mm²
Outline Drawing:21-0093 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B9-3*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX3785UTT+T    
Active   TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX3785UTT-T    
Active   TDFN-EP;6 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0058 (PDF)
Use pkgcode/variation: T633-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX3785UWL+T    
Active   WLP;6 pin;2.6 mm²
Outline Drawing:21-0067 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: W91B1+2*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

Notes:
  1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
  2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
  3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
  4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Similar Products by Function

MAX3800 3.2Gbps Adaptive Equalizer and Cable Driver
MAX3801 3.2Gbps Adaptive Equalizer
MAX3980 3.125Gbps XAUI Quad Equalizer
MAX3981 3.125Gbps XAUI Quad Cable Equalizer
MAX3802 3.2Gbps Quad Adaptive Cable Equalizer with Cable Driver
MAX3784, MAX3784A 5Gbps PCB Equalizer
See All Equalizers (Cable and Circuit Board) (24 Products)

Similar Products by Application

Switch/Router Line Card > Backplane Interface/Signal Integrity
Switch/Router Switch Card > Backplane Interface/Signal Integrity

Evaluation Kits

MAX3785EVKIT Evaluation Kit for the MAX3785
MAX3785UTTEVKIT Evaluation Kit for the MAX3785UTT

Products with Similar Part Numbers

MAX3785EVKIT Evaluation Kit for the MAX3785
MAX3785UTTEVKIT Evaluation Kit for the MAX3785UTT

More Information

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


Didn't Find What You Need?

Information Index

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


 


Contact Us     |     Privacy Policy     |     Legal Notices
Copyright © 2012 by Maxim Integrated Products