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SY88347DL 데이터시트(PDF) 1 Page - Micrel Semiconductor |
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SY88347DL 데이터시트(HTML) 1 Page - Micrel Semiconductor |
1 / 9 page SY88347DL 3.3V, 3.2Gbps PECL Limiting Post Amplifier with High-Gain TTL Loss-of-Signal MLF and MicroLeadFrame are registered trademarks of Amkor Technology. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com February 2007 M9999-021707-B hbwhelp@micrel.com or (408) 955-1690 General Description The SY88347DL 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 SY88347DL quantizes these signals and outputs PECL-level waveforms. The SY88347DL operates from a single +3.3V power supply, over temperatures ranging from –40 oC to +85oC. With its wide bandwidth and high gain, signals with data rates up to 3.2Gbps, and as small as 5mVPP, can be amplified to drive devices with PECL inputs. The SY88347DL generates a high-gain loss-of-signal (LOS) open-collector TTL output. The LOS function has a high-gain input stage for increased sensitivity. 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 sets by LOSLVL and de-asserts low otherwise. The enable bar input (/EN) de-asserts the true output signal without removing the input signal. The LOS output can be fed back to the /EN input to maintain output stability under a loss-of-signal condition. Typically, 3.3dB LOS hysteresis is provided to prevent chattering. Datasheet and support documentation can be found on Micrel’s web site at: www.micrel.com. Features • Single 3.3V power supply • 155Mbps to 3.2Gbps operation • Low-noise PECL data outputs • High-gain LOS output • Chatter-free Open-Collector TTL Loss-of-Signal (LOS) output • TTL /EN input • Programmable LOS level set (LOSLVL) • Ideal for multi-rate applications • Available in a tiny 10-pin EPAD-MSOP Applications • APON, BPON, EPON, GEPON, and GPON • Gigabit Ethernet • 1X and 2X Fibre Channel • SONET/SDH:OC-3/12/24/48 – STM 1/4/8/16 • High-gain line driver and line receiver Markets • FTTP • Optical transceivers • Datacom/Telecom • Low-gain TIA interface • Long reach FOM |
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