MAX3955
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MAX3955

11.32Gbps Transceiver with Dual CDRs, Digital Monitors, and DC-Coupled Laser Driver

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Enables 1W SFP+ Sonet OC-192 Applications

warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $14.89
Features
    Performance
    • Dual CDRs Exceeding SONET Jitter Requirements with PLL Bandwidth Setting of 7MHz
    • 540mW Typical IC Power Dissipation (ILD_MOD = 45mA, IBIAS = 45mA, Both CDRs Enabled)
    Flexibility
    • Independent, Reference-less Tx and Rx CDRs
    • Pattern Generator for Receive and Transmit Paths
    • Signal Loop-Back Paths
    • Programmable Tx Input Equalization and Rx Output Deemphasis
    • Pin-Compatible with MAX3956 11.3Gbps Transceiver
    Safety and Monitoring
    • Integrated Eye Safety Features with Maskable Fault and Interrupt Signal Generation
    • Analog Monitors with Integrated 12-Bit ADC, Fully Supporting SFF-8472 DDM with Digital-Only µC
    • High-Accuracy Temperature, VCC, and RSSI Monitors
    • Auxiliary ADC Input at BADC for General Use
Additional Details
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The MAX3955 is an 11.3Gbps, highly-integrated, low-power transceiver with dual CDRs, and digital diagnostics monitoring (DDM) designed for next-generation SONET transmission systems. The receiver incorporates a limiting amplifier with loss-of-signal (LOS) circuit. The limiting amplifier features an independent 9.95Gbps to 11.32Gbps CDR. The transmitter incorporates Maxim’s proprietary DC-coupled laser driver interface, an independent 9.95Gbps to 11.32Gbps CDR, and closed-loop control of average laser power.

The MAX3955 supports differential AC-coupled signaling with integrated 50Ω terminations at Rx input, Rx output, and Tx input. The Tx output is a DC-coupled 25Ω laser diode interface with dedicated pins for the laser anode (TOUTA) and the laser cathode (TOUTC).

An integrated 12-bit analog-to-digital converter (ADC) is utilized to provide digital monitors of internal/external temperature, VCC, and received signal strength indication (RSSI). The MAX3955’s analog monitors and the use of a 2-wire or 3-wire slave interface enables configuration through either a digital-only microcontroller (µC) or through the DS1978 SFP+ controller (future product).

The MAX3955 operates from single +3.3V supply and over a -40°C to +95°C temperature range and is available in a standard 5mm x 5mm, 32-pin TQFN-EP package.

Applications

  • OC-192 XFP and SFP+ Optical Transceivers
Part Models 2
1ku List Price Starting From $14.89

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Nov 6, 2015

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