MAX3945
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MAX3945

1.0625Gbps to 11.3Gbps, SFP+ Dual-Path Limiting Amplifier

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1Gbps to 11Gbps Limiting Amp Enables < 1W SFP+ Optical Transceiver Modules

warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $4.76
Features
  • 130mW Power Dissipation Enables < 1W SFP+ Modules
  • Enables Single-Module Design Compliance with 1000BASE-SX/LX and 10GBASE-SR/LR Specifications
  • -25.3dBm Optical Sensitivity at 1.25Gbps Using a 10.32Gbps ROSA
  • Selectable 1GHz/2.1GHz/2.5GHz/3GHz Input Filters at RATE_SEL = 0 Setting
  • Supports SFF-8431 SFP+ MSA and SFF-8472 Digital Diagnostic
  • Total Power Dissipation of 130mW at 3.3V Power Supply with RSSI Monitor-Based LOS
  • Total Power Dissipation of 154mW at 3.3V Power Supply with Rx Input-Based LOS
  • 4mVP-P Input Sensitivity at 11.3Gbps
  • 4psP-P DJ at 11.3Gbps with RATE_SEL = 1
  • 4psP-P DJ at 8.5Gbps with RATE_SEL = 1
  • 5psP-P DJ at 4.25Gbps with RATE_SEL = 0, BW1 = 1, BW0 = 1
  • 9.0psP-P DJ at 1.25Gbps with RATE_SEL = 0, BW1 = 0, BW0 = 0
  • 26ps Rise and Fall Time with RATE_SEL = 1
  • 52ps Rise and Fall Time with RATE_SEL = 0
  • CML Output with Level Adjustment and Squelch Mode
  • Programmable CML Output Deemphasis
  • CML Output Polarity Select
  • LOS Polarity Select
  • Programmable Masking Time for the LOS Output
  • LOS Assert/Deassert Level Adjustment
  • Choice of Rx Input-Based LOS or RSSI Monitor-Based LOS
  • 3-Wire Digital Interface Compatible with Maxim’s SFP+ Family of Products
Additional Details
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The MAX3945 is a +3.3V, multirate, low-power limiting amplifier optimized for Fibre Channel and Ethernet transmission systems at data rates up to 11.3Gbps. The high-sensitivity limiting amplifier limits the signal generated by a transimpedance amplifier into a CML-level differential output signal. All differential inputs and outputs (I/O) are optimally back terminated for 50Ω transmission line PCB design. The MAX3945's dual-path limiting amplifier has programmable filtering to optimize sensitivity for different data rates and to suppress relaxation oscillations that could occur in some optical systems. The MAX3945 incorporates two loss-of-signal (LOS) circuits and a programmable time mask for the LOS output.

A 3-wire digital interface reduces the pin count and enables control of LOS threshold, LOS polarity, LOS mode, CML output level, input offset correction, receive (Rx) polarity, Rx input filter, and Rx deemphasis without the need for external components.

The MAX3945 is packaged in a 3mm x 3mm, 16-pin TQFN package.

Applications

  • 10G PON ONU
  • 10GBASE-SR/LR SFP+ Optical Transceiver
  • 1x/2x/4x/8x SFF/SFP/SFP+ MSA Fibre-Channel Optical Transceiver
Part Models 2
1ku List Price Starting From $4.76

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX3945ETE+
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MAX3945ETE+T
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Part Models

Product Lifecycle

PCN

Aug 14, 2023

- 2275A

WAFER FAB

MAX3945ETE+

PRODUCTION

MAX3945ETE+T

PRODUCTION

Dec 13, 2013

- 1355

MECHANICAL DATASHEET

MAX3945ETE+

PRODUCTION

MAX3945ETE+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Aug 14, 2023

- 2275A

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WAFER FAB

MAX3945ETE+

PRODUCTION

MAX3945ETE+T

PRODUCTION

Dec 13, 2013

- 1355

arrow down

MECHANICAL DATASHEET

MAX3945ETE+

PRODUCTION

MAX3945ETE+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX3945EVKIT

Evaluation Kit for the MAX3945

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MAX3945EVKIT

Evaluation Kit for the MAX3945

Evaluation Kit for the MAX3945

Features and Benefits

  • Fully Assembled and Tested
  • Software Control Through USB Port
  • SMA Connectors for High-Speed Inputs and Output

Product Detail

The MAX3945 evaluation kit (EV kit) is an assembled electrical demonstration board that provides easy computer-controlled evaluation of the MAX3945 multirate limiting amplifier. The included software communicates with the EV kit through the USB port, and provides access to all the internal registers to optimize the functionality of the MAX3945. The EV kit is powered by a +3.3V supply and USB port. SMA connectors are used for the high-speed inputs and outputs. An LED indicates the status of USB power.

Applications

  • 10G PON ONU
  • 10GBASE-SR/LR SFP+ Optical Transceiver
  • 1x/2x/4x/8x SFF/SFP/SFP+ MSA Fibre-Channel Optical Transceiver

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