SY88309BL 3.3V, 3.2Gbps PECL Limiting Post Amplifier with Wide Signal-Detect Range General Description Features The SY88309BL low-power limiting post amplifiers are Signal Detect circuit optimized to detect a larger and designed for use in fiber-optic receivers. These devices wider input range (20mV -140mV ) PP PP connect to typical transimpedance amplifiers (TIAs). The Chatter-free Open-Collector TTL Signal-Detect (SD) linear signal output from TIAs can contain significant Single 3.3V power supply amounts of noise and may vary in amplitude over time. 155Mbps to 3.2Gbps operation The SY88309BL quantizes these signals and output PECL-level waveforms. Low-noise PECL data outputs The SY88309BL operates from a single +3.3V power Programmable SD level set (SD ) LVL o o supply, over temperatures ranging from 40 C to +85 C. Available in a tiny 10-pin EPAD-MSOP and 16-pin With their wide bandwidth and high gain, signals with QFN package data rates up to 3.2Gbps, and as small as 10mVpp, can be amplified to drive devices with CML or PECL inputs. Applications It generates a Signal Detect (SD) open-collector TTL PON output. The SD function is optimized to detect a larger Gigabit Ethernet and wider input range, as shown in the characteristic 1X and 2X Fibre Channel curve on page 6. A programmable signal-detect level set pin (SD ) sets the sensitivity of the input amplitude LVL SONET/SDH:OC-3/12/24/48 STM 1/4/8/16 detection. High-gain line driver and line receiver SD asserts high if the input amplitude rises above the threshold sets by SD and de-asserts low otherwise. Markets LVL The SD output can be fed back to the EN input to FTTX maintain stability. Typically, 3.5dB LOS/SD hysteresis is Optical transceivers provided to prevent chattering. Datacom/Telecom Datasheet and support documentation can be found on Micrels web site at: www.micrel.com. Low-gain TIA interface Long-reach FOM Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. SY88309BL Typical Application Pin Configuration 10-Pin EPAD-MSOP (K10-2) 16-Pin QFN Ordering Information Package Operating Lead Part Number Package Marking Type Range Finish Matte-Sn SY88309BLEY K10-2 Industrial 309B with Pb-Free bar line indicator Pb-free Matte-Sn (1) SY88309BLEYTR K10-2 Industrial 309B with Pb-Free bar line indicator Pb-free NiPdAu SY88309BLMG QFN-16 Industrial 309B with Pb-Free bar line indicator Pb-free NiPdAu (1) SY88309BLMGTR QFN-16 Industrial 309B with Pb-Free bar line indicator Pb-free Note: 1. Tape and Reel. 2 M9999-111507-C November 2007 hbwhelp micrel.com or (408) 955-1690