SY88703V Datasheet | Micrel Semiconductor

Micrel, Inc. 3.3V/5V 622Mbps PECL LOW-POWER LIMITING POST AMPLIFIER W/TTL LOS Features s Single 3.3V or 5V power supply s Up to 622Mbps operation s Low noise PECL data outputs s Chatter-free TTL Loss-of-Signal (LOS) output s TTL /EN input s Programmable LOS level set (LOSLVL) s 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 DESCRIPTION The SY88703V 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 SY88703V quantizes these signals and outputs PECL level waveforms. The SY88703V 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 SY88703V 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. TYPICAL APPLICATIONS CIRCUIT From Transimpedance Amp. 0.1µF 0.1µF 50Ω 2kΩ LOS DIN /DIN VCC /EN DOUT /DOUT 0.1µF 0.1µF 50Ω GND LOSLVL VREF Rpd Rpd VCC 100Ω 3kΩ For 3.3V, Rpd = 120Ω For 5V, Rpd = 220Ω To CDR M9999-052406 hbwhelp@micrel. or (408) 955-1690 Rev.: C Amendment: /0 Issue Date: May 2006 Micrel, Inc. PACKAGE/ORDERING INFORMATION /EN 1 DIN 2 /DIN 3 VREF 4 LOSLVL 5 10 VCC 9 DOUT 8 /DOUT 7 LOS 6 GND 10-Pin MSOP...