SY88303BL 3.3V, 3.2Gbps CML Limiting Post Amplifier with Wide Loss-of-Signal Detection Range General Description Features The SY88303BL low-power limiting post amplifiers are Loss-of-signal detection circuit optimized to detect a designed for use in fiber-optic receivers. These devices wide input range connect to typical transimpedance amplifiers (TIAs). The Chatter-free Open-Collector TTL Loss-of-Signal linear signal output from TIAs can contain significant (LOS) output amounts of noise and may vary in amplitude over time. Single 3.3V power supply The SY88303BL quantizes these signals and output 155Mbps to 3.2Gbps operation CML-level waveforms. Low-noise CML data outputs The SY88303BL operates from a single +3.3V power o o Programmable LOS level set (LOS ) supply, over temperatures ranging from 40 C to +85 C. LVL With their wide bandwidth and high gain, signals with Available in a tiny 10-pin EPAD-MSOP and 16-pin data rates up to 3.2Gbps, and as small as 10mV , can PP QFN package be amplified to drive devices with CML/PECL inputs. Applications The device generates a loss-of-signal (LOS) open- collector TTL output. The LOS function is optimized to PON detect a wide input range, as shown in the typical Gigabit Ethernet operating characteristic curve on Page 6. A 1X and 2X Fibre Channel programmable loss-of-signal level-set pin (LOS ) sets LVL the sensitivity of the input amplitude detection. SONET/SDH: OC 3/12/24/48 STM 1/4/8/16 LOS asserts high if the input amplitude falls below the High-gain line driver and line receiver threshold sets by LOS and de-asserts low otherwise. LVL The enable bar input (/EN) de-asserts the true output Markets signal without removing the input signal. The LOS FTTX output can be fed back to the /EN input to maintain Optical transceivers output stability under a loss-of-signal condition. Typically, 3.5dB LOS hysteresis is provided to prevent Datacom/Telecom chattering. Low-gain TIA interface Datasheet and support documentation can be found on Long-reach FOM Micrels web site at: www.micrel.com. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 http:www.micrel.com M9999-110207-A November 2007 hbwhelp micrel.com or (408) 955-1690 Micrel, Inc. SY88303BL Typical Application Pin Configuration 16-Pin QFN 10-Pin EPAD-MSOP (K10-2) Ordering Information Package Operating Lead Part Number Package Marking Type Range Finish Matte-Sn SY88303BLEY K10-2 Industrial 303B with Pb-Free bar line indicator Pb-free (1) Matte-Sn SY88303BLEYTR K10-2 Industrial 303B with Pb-Free bar line indicator Pb-free NiPdAu SY88303BLMG QFN-16 Industrial 303B with Pb-Free bar line indicator Pb-free NiPdAu (1) SY88303BLMGTR QFN-16 Industrial 303B with Pb-Free bar line indicator Pb-free Note: 1. Tape and Reel. 2 M9999-110207-A November 2007 hbwhelp micrel.com or (408) 955-1690