On March 19, 2014, Micrel Korea (CEO Oh Young-jun, www.micrel.com), a leading industry provider of high-performance analog and high-speed mixed-signal solutions as well as LAN, timing and communications solutions, launched two new post-limiting amplifier devices: SY88073L and SY88083L. These devices are ideal for FTTH XGPON.2 ONU/ONT (Optical Network Unit / Optical Network Terminal) applications supporting next-generation PON networks. Additionally, this product family is suitable for all continuous-mode optical communication and copper cable SFP+ transceiver modules for multi-rate applications from 1Gbps to 12.5Gbps supporting 10G Ethernet, optical channel, OTN, and CPRI/OBSAI data rates. Inquiries regarding product samples and pricing are available through Micrel Korea or the website www.micrel.com.)

Both devices allow users to select LOS or SD status signals and a wide differential input voltage range from 10mVPP to 1800mVPP to extend link distance operation. Electrical hysteresis of 4dB is provided across a wide LOS/SD threshold range from 4.5mVPP to 30mVPP. Integrated 50Ohm input and output impedance with CML output and average rise/fall times of 30ps optimize high-speed signal integrity and reduce the number of external components, thereby reducing BOM costs. TTL-compatible JAM input enables SQUELCH functionality by relaying LOS or SD signals. Additionally, the devices feature selectable RXOUT+/RXOUT- signal polarity (SY88073L) and various other functions.

Tom Kapucija, Marketing Director of Micrel's High-Speed Communications Division, stated, "These new devices offer the industry's highest 12.5Gbps with extensive user-selectable SD Assert and LOS De-Assert threshold levels, 4dB electrical hysteresis, and much faster SD Assert and LOS De-Assert timing compared to competitors' continuous-mode devices, providing a wide 10mVPP BER differential sensitivity." He added, "These features improve system reach and optimize link efficiency by enhancing link up-time and payload bandwidth."

Rami Kanama, Vice President of Micrel's Timing and Communications Business Group, stated, "Micrel is focusing on providing industry-leading solutions for communications carriers that need to transition to next-generation PON networks utilizing the XGPON.2 protocol and address growing data demands." He noted, "The new optical limiting amplifier provides critical speed, performance, and features to address technical challenges facing next-generation FTTH, enterprise, and transmission networks. By improving link efficiency, system operators can achieve higher data transmission performance and contribute to reducing both CapEx and OpEx for communications carriers."

The SY88073L allows users to adjust and determine threshold values to optimize BER (Bit Error Rate) operation in noise-intensive applications through asymmetric noise distribution, while the SY88083L offers users the option of DOC (Digital Offset Correction) functionality that automatically compensates the device's internal offset in high-speed data paths. Additionally, increased performance margins relative to current customer requirements improve module productivity and reduce costs.

Both devices provide a wide supply voltage range of ±10% at 3.3V, industrial temperature range from -40℃ to +85℃, and are supplied in a compact 3mm x 3mm, 16-lead QFN package.