SY88803V Datasheet | Micrel Semiconductor

.. Micrel, Inc 3.3V/5V 155Mbps PECL LOW POWER LIMITING POST AMPLIFIER W/TTL LOS Features s s s s s s s Single 3.3V or 5V power supply Up to 155Mbps operation Low noise PECL data outputs Chatter-free TTL Loss-of-Signal (LOS) output TTL /EN input Programmable LOS level set (LOSLVL) Available in a tiny 10-pin MSOP (3mm) package DESCRIPTION The SY88803V low power limiting post amplifier is designed for use in fiber-optic receivers. The device connects to typical transimpedance amplifiers (TIAs). The linear signal output from TIAs can contain significant amounts of noise and may vary in amplitude over time. The SY88803V quantizes these signals and outputs PECL level waveforms. The SY88803V operates from a single +3.3V or +5V power supply, over temperatures ranging from - 40°C to +85°C. With its wide bandwidth and high gain, signals with data rates up to 155Mbps and as small as 5m Vp-p can be amplified to drive devices with PECL inputs. The SY88803V generates a TTL LOS output. A programmable loss-of-signal level set pin (LOSLVL) sets the sensitivity of the input amplitude detection. LOS asserts high if the input amplitude falls below the threshold set by LOSLVL and deasserts low otherwise. /EN deasserts the true output signal without removing the input signal. Typically 4.6d B loss-of-signal hysteresis is provided to prevent chattering. APPLICATIONS s 155Mbps SONET/SDH s Small form factor transceivers s High-gain line driver and line receiver TYPICAL APPLICATIONS CIRCUIT VCC 2.5kΩ VCC LOS From Transimpedance Amp. 0.1µF 0.1µF 50Ω DIN /DIN 50Ω /EN DOUT 0.1µF 0.1µF Rpd LOSLVL VCC VREF /DOUT Rpd To CDR 100Ω 3kΩ For 3.3V, Rpd = 120Ω For 5V, Rpd = 220Ω M9999-051706 hbwhelp@micrel. or (408) 955-1690 Rev.: D Amendment: /0 Issue Date: May 2006 Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information(1) /EN 1 DIN 2 /DIN 3 VREF 4 LOSLVL 5 10 VCC 9 DOUT 8 /DOUT 7 LOS 6...