SY88803VKG Microchip

SY88803V Micrel, Inc 3.3V/5V 155Mbps PECL LOW POWER SY88803V LIMITING POST AMPLIFIER W/TTL LOS FEATURES DESCRIPTION Single 3.3V or 5V power supply The SY88803V low power limiting post amplifier is Up to 155Mbps operation designed for use in fiber-optic receivers. The device connects to typical transimpedance amplifiers (TIAs). The linear signal Low noise PECL data outputs output from TIAs can contain significant amounts of noise Chatter-free TTL Loss-of-Signal (LOS) output and may vary in amplitude over time. The SY88803V TTL /EN input quantizes these signals and outputs PECL level waveforms. Programmable LOS level set (LOS ) LVL The SY88803V operates from a single +3.3V or +5V Available in a tiny 10-pin MSOP (3mm) package power supply, over temperatures ranging from 40C to +85C. With its wide bandwidth and high gain, signals with data rates up to 155Mbps and as small as 5mVp-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 (LOS ) sets the LVL sensitivity of the input amplitude detection. LOS asserts APPLICATIONS high if the input amplitude falls below the threshold set by LOS and deasserts low otherwise. /EN deasserts the LVL 155Mbps SONET/SDH true output signal without removing the input signal. Typically Small form factor transceivers 4.6dB loss-of-signal hysteresis is provided to prevent chattering. High-gain line driver and line receiver TYPICAL APPLICATIONS CIRCUIT V CC 2.5k V CC LOS /EN D D 0.1 F 0.1 F IN OUT From To Transimpedance /D /D 0.1 F CDR IN OUT 0.1 F SY88803V Amp. LOS V 50 50 LVL REF R R pd pd V CC GND GND 100 3k For 3.3V, R = 120 pd For 5V, R = 220 pd Rev.: D Amendment: /0 M9999-051706 1 Issue Date: May 2006 hbwhelp micrel.com or (408) 955-1690SY88803V Micrel, Inc. PACKAGE/ORDERING INFORMATION (1) Ordering Information Package Operating Package Lead /EN 1 10 VCC Part Number Type Range Marking Finish DIN 2 9 DOUT SY88803VKC K10-1 Commercial SY88803V Sn-Pb /DIN 3 8 /DOUT (2) SY88803VKCTR K10-1 Commercial SY88803V Sn-Pb VREF 4 7 LOS SY88803VKG K10-1 Industrial SY88803V with Pb-free NiPdAu LOSLVL 5 6 GND bar-line indicator (2) SY88803VKGTR K10-1 Industrial SY88803V with Pb-free NiPdAu 10-Pin MSOP bar-line indicator (K10-1) Notes: 1. Contact factory for die availability. Die is guaranteed at T = 25C, DC electricals only. A 2. Tape and Reel. PIN DESCRIPTION Pin Number Pin Name Type Pin Function 1 /EN TTL Input: Enable: Deasserts true data output when high. Default is high. 2 DIN Data Input True data input. 3 /DIN Data Input Complementary data input. 4 VREF Reference voltage. 5 LOSLVL Input Loss-of-Signal Level Set: A voltage between V and V on this CC REF pin sets the threshold for the data input amplitude at which LOS will be asserted. 6 GND Ground Device ground. 7 LOS Open-collector Loss-of-Signal: Asserts high when the data input amplitude falls below TTL Output the threshold set by LOS . Requires external pullup resistor of 2.5k . LVL 8 /DOUT PECL Output Complementary data output. 9 DOUT PECL Output True data output. 10 VCC Power Supply Positive power supply. M9999-051706 2 hbwhelp micrel.com or (408) 955-1690