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SY88289CL 데이터시트(PDF) 1 Page - Micrel Semiconductor |
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SY88289CL 데이터시트(HTML) 1 Page - Micrel Semiconductor |
1 / 10 page SY88289CL 3.3V, 3.2Gbps CML 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 M9999-021207-B hbwhelp@micrel.com or (408) 955-1690 General Description The SY88289CL low-power, high-sensitivity, 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 SY88289CL quantizes these signals and outputs CML-level waveforms. The SY88289CL 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 CML inputs or AC- coupled CML/PECL inputs. The SY88289CL generates a high-gain loss-of-signal (LOS) open-collector TTL output. This function has a high-gain input stage for increased LOS 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, 3.5dB LOS hysteresis is provided to prevent chattering. All support documentation can be found on Micrel’s web site at: www.micrel.com. Features • Single 3.3V power supply • 125Mbps to 3.2Gbps operation • Low-noise CML data outputs • High-gain LOS • Chatter-free open-collector TTL Loss-of-Signal (LOS) output with an internal 4.75kΩ pull-up resistor • TTL /EN input • Programmable LOS level set (LOSLVL) • Ideal for multi-rate applications • Available in a tiny (3mm x 3mm) 16-pin MLF® package 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 • Low-gain TIA interface Markets • FTTP/FTTH • Optical transceivers • Datacom/Telecom • Long reach FOM |
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