SY88793V Datasheet | Micrel Semiconductor

Micrel, Inc. 3.3V/5V 622Mbps PECL LOW-POWER LIMITING POST AMPLIFIER WITH TTL SIGNAL DETECT DESCRIPTION Features s s s s s s s Single 3.3V or 5V power supply Up to 622Mbps operation Low noise PECL data outputs Chatter-free TTL Signal Detect (SD) output TTL EN input Programmable SD level set (SDLVL) Available in a tiny 10-pin MSOP (3mm) package APPLICATIONS s 622Mbps SONET/SDH s Small form factor transceivers s High-gain line driver and line receiver The SY88793V 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 SY88793V quantizes these signals and outputs PECL level waveforms. The SY88793V 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 622Mbps and as small as 5m Vp-p can be amplified to drive devices with PECL inputs. The SY88793V generates a TTL SD output. A programmable signal-detect level set pin (SDLVL) sets the sensitivity of the input amplitude detection. SD asserts high if the input amplitude rises above the threshold set by SDLVL and deasserts low otherwise. EN deasserts the true output signal without removing the input signal. Typically 6d B SD hysteresis is provided to prevent chattering. .. TYPICAL APPLICATIONS CIRCUIT SD From Transimpedance Amp. 0.1µF 0.1µF 50Ω DIN /DIN 50Ω DOUT 0.1µF 0.1µF Rpd SDLVL VREF /DOUT Rpd To CDR 100kΩ 0.1µF For 3.3V, Rpd = 120Ω For 5V, Rpd = 220Ω M9999-072505 hbwhelp@micrel. or (408) 955-1690 Rev.: B Amendment: /0 Issue Date: July 2005 Micrel, Inc. PACKAGE/ORDERING INFORMATION EN 1 DIN 2 /DIN 3 VREF 4 SDLVL 5 10 VCC 9 DOUT 8 /DOUT 7 SD 6 GND Ordering...