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Micrel launches 12.5Gbps high sensitivity limiting amplifiers

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Harmeet
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SAN JOSE, USA: Micrel Inc. launched the SY88073L and SY88083L, two new limiting post amplifiers.

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The devices are ideal for FTTH XGPON.2 ONU/ONT (Optical Network Unit / Optical Network Terminal) applications supporting the build out of next generation PON networks. This product family is also suitable for use in all continuous mode fiber optic or copper cable SFP+ transceiver modules for multi-rate applications from 1G to 12.5Gbps supporting 10G Ethernet, Fibre Channel, OTN, and CPRI/OBSAI data rates.

Both devices offer user selectable LOS or SD status signals and a wide differential input voltage range of 10mVPP to 1800mVPP for extended link distance operation. Electrical hysteresis of 4dB is provided across a wide LOS/SD threshold range of 4.5mVPP to 30mVPP. Integrated 50 Ohm input and output impedances with CML output, with 30ps typical rise/fall times, optimize high speed signal integrity while reducing external component counts and BOM cost.

The TTL compatible JAM input enables a SQUELCH function by routing back the LOS or SD signal. Other features include selectable RXOUT+ / RXOUT- signal polarity (SY88073L).

"These new devices offer an impressive BER differential sensitivity of 10mVPP up to 12.5Gbps with wide range SD Assert and LOS De-Assert user selectable threshold levels, 4dB of electrical hysteresis, and faster SD Assert and LOS De-Assert timing than competitive continuous mode devices," stated Tom Kapucija, director of marketing for the high speed communications business, Micrel. "These features enable link efficiency optimization with increased system reach, higher link up-time and higher payload bandwidth."

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