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SY88289AL 데이터시트(PDF) 1 Page - Micrel Semiconductor |
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SY88289AL 데이터시트(HTML) 1 Page - Micrel Semiconductor |
1 / 9 page SY88289AL 3.3V, 3.2Gbps CML Low-Power Limiting Post Amplifier with TTL Loss-of-Signal MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. 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 SY88289AL 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 SY88289AL quantizes these signals and outputs CML-level waveforms. The SY88289AL 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 10mVP-P, can be amplified to drive devices with CML inputs or AC- coupled CML/PECL inputs. The SY88289AL generates a loss-of-signal (LOS) open- collector TTL 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 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 • Chatter-free open-collector TTL Loss-of-signal (LOS) output with internal 4.75kΩ pull-up resistor • TTL /EN input • Internal 50Ω input termination • Programmable LOS level set (LOSLVL) • Ideal for multi-rate applications • Available in a tiny 3mmx3mm 16-pin MLF® package Applications • APON, BPON, EPON, GEPON, and GPON • Gigabit Ethernet • Fibre Channel • SONET/SDH:OC-3/12/24/48 – STM 1/4/8/16 • High-gain line driver and line receiver Markets • Optical transceivers • Datacom/telecom Typical Application |
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