SY88893VKG Microchip

3.3V/5V 155Mbps PECL LOW-POWER SY88893V Micrel, Inc. LIMITING POST AMPLIFIER W/TTL SY88893V SIGNAL DETECT FEATURES DESCRIPTION Single 3.3V or 5V power supply The SY88893V 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 Signal Detect (SD) output and may vary in amplitude over time. The SY88893V TTL EN input quantizes these signals and outputs PECL level waveforms. Programmable SD level set (SD ) LVL The SY88893V operates from a single +3.3V or +5V Available in tiny 10-pin MSOP (3mm 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 SY88893V generates a TTL SD output. A programmable signal-detect level set pin (SD ) sets the LVL sensitivity of the input amplitude detection. SD asserts high APPLICATIONS if the input amplitude rises above the threshold set by SD LVL and deasserts low otherwise. EN deasserts the true output 155Mbps SONET/SDH signal without removing the input signal. Typically 6dB SD Small form factor transceivers hysteresis is provided to prevent chattering. High-gain line driver and line receiver TYPICAL APPLICATIONS CIRCUIT V CC SD 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 SY88893V Amp. SD V 50 50 LVL REF R R pd pd V CC GND GND 0.1 F 100k For 3.3V, R = 120 pd For 5V, R = 220 pd Rev.: B Amendment: /0 M9999-081005 Issue Date: August 2005 1 hbwhelp micrel.com or (408) 955-1690SY88893V Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information EN 1 10 VCC DIN 2 9 DOUT Package Operating Package Lead Part Number Type Range Marking Finish /DIN 3 8 /DOUT SY88893VKC K10-1 Commercial 893V Sn-Pb VREF 4 7 SD (1) SY88893VKCTR K10-1 Commercial 893V Sn-Pb SDLVL 5 6 GND SY88893VKG K10-1 Industrial 893V with Pb-Free Pb-Free bar-line indicator NiPdAu 10-Pin MSOP (1) SY88893VKGTR K10-1 Industrial 893V with Pb-Free (K10-1) Pb-Free bar-line indicator NiPdAu Note: 1. 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 SDLVL Input Signal-Detect Level Set: A resistor from this pin to V sets the CC threshold for the data input amplitude at which SD will be asserted. 6 GND Ground Device ground. 7 SD Open-collector Signal-Detect: Asserts high when the data input amplitude rises above TTL output w/ the threshold set by SD . LVL internal 6.75k pullup resistor 8 /DOUT PECL Output Complementary data output. 9 DOUT PECL Output True data output. 10 VCC Power Supply Positive power supply. M9999-081005 2 hbwhelp micrel.com or (408) 955-1690