MAX3785

NOT RECOMMENDED FOR NEW DESIGNS

6.25Gbps, 1.8V PC Board Equalizer

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

Data Sheet (Rev. 4) Product Selection Table
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Overview

  • 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

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.

Applications

  • Double IEEE 802.3ae XAUI
  • Double STM-16/OC-48
  • HSBI for ≤ 6.4Gbps
MAX3785
6.25Gbps, 1.8V PC Board Equalizer
MAX3785: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 3

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Hardware Ecosystem

Parts Product Life Cycle Description
Differential Amplifiers 1
MAX3802
PRODUCTION 3.2Gbps Quad Adaptive Cable Equalizer with Cable Driver
Interface Transceivers 5
MAX3800
NOT RECOMMENDED FOR NEW DESIGNS 3.2Gbps Adaptive Equalizer and Cable Driver
MAX3801
NOT RECOMMENDED FOR NEW DESIGNS 3.2Gbps Adaptive Equalizer
MAX3784
Obsolete 5Gbps PCB Equalizer
MAX3980
NOT RECOMMENDED FOR NEW DESIGNS 3.125Gbps XAUI Quad Equalizer
MAX3981
Obsolete 3.125Gbps XAUI Quad Cable Equalizer
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Tools & Simulations

IBIS Model 1

Evaluation Kits

MAX3785UTTEVKIT

Evaluation Kit for the MAX3785UTT

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Features and Benefits

  • Fully Assembled and Tested
  • Connectors for All High-Speed Inputs and Outputs
  • Calibration test strip.

Product Details

The MAX3785UTT evaluation board and kit (EV kit) simplifies evaluation of the MAX3785UTT 6.25 Gbps equalizer. The EV kit enables testing of all the device functions. SMA connectors with 50Ω controlled impedance to the MAX3785UTT are provided for all input and output ports to facilitate connection to high-speed test equipment.

Applications

  • Double IEEE 802.3ae XAUI
  • Double STM-16/OC-48
  • HSBI for < 6.4Gbps
MAX3785UTTEVKIT
Evaluation Kit for the MAX3785UTT

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