PX5429A - 12 x 3 Gbps Optical Receiver with ACJTAG

Full Optical I/O information, including complete datasheets, is available to qualified customers. For further information, please send an email to OptoIO@Zarlink.com or contact your sales representative.

The growing use of the Internet has created increasingly higher demand for multi-Gbps I/O performance. The demand for 100+ Gbps WAN bandwidth fuels the growth of short-reach 40 Gbps infrastructures within high-end telco and datacom routers, switches, servers and other proprietary chassis-to-chassis links. The Zarlink PX5429A 12x3 Gbps TIA/LA Receiver with ACJTAG is a twelve channel TIA/LA optical receiver designed for various 12x3 Gbps parallel PMD applications. It consists of a DC-coupled transimpedance amplifier and an AC-coupled differential limiting amplifier. The transimpedance amplifier achieves a nominal 3 GHz bandwidth over a wide range of photodiode input capacitance. Excellent channel-to-channel isolation ensures data integrity at the receiver sensitivity limits. A global signal detect circuit provides the photodiode reverse bias voltage supply and senses average photocurrent supplied to the photodiode array.

The transimpedance amplifier is internally AC-coupled to a high-gain, high-bandwidth differential limiting amplifier. The limiting amplifier provides a differential back-terminated CML output that can be used to drive 3 Gbps per channel transceivers or other CML compatible clock and data recovery circuits. The limiting amplifier features an adjustable signal detect circuit that senses optical modulation amplitude (OMA) to provide a received signal indication for each channel.

The Zarlink PX5429A Receiver provides full ACJTAG support for boundary scan testability, allowing either AC or DC module connectivity validation and systems test.

Features

• 12x3.6 Gbps integrated transimpedance and limiting amplifier enabling various 40 Gbps parallel channel optical receiver PMD applications
• 8 μA_pp receiver sensitivity for 10^-12 BER
• Single +3.3 V supply dissipating 100 mW per channel
• Global signal detect senses quiescent photocurrent with adjustable threshold and hysteresis
• Squelch automatically disables channels when input signal strength is below programmable threshold
• Individual channel signal detect senses input signal strength (0MA) with adjustable sensitivity and hysteresis
• Serial digital interface for controlling channel power down, signal detect sensitivity, output amplitude and global signal detect
• Differential back-terminated outputs
• Flip-chip or direct wire-bond attach to photodiode
• 250-micron channel pitch matches optical ribbon fiber and array photodiodes
• ACJTAG boundary scan testability

Typical Applications

• SNAP12 MSA
• OC-768 VSR parallel optics
• Proprietary 40 Gbps intra-system parallel optics
• InfiniBand™ 12X parallel optics PMD

Product Availability and Packaging

Product Lead-Times when quoted are not guaranteed and are provided as a general guideline only; they may be varied from time to time without notice. Updated estimates or actual schedule commit dates will be provided at the time of order placement with Zarlink or its distributor.

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