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SY88973BL 데이터시트(PDF) 1 Page - Micrel Semiconductor |
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SY88973BL 데이터시트(HTML) 1 Page - Micrel Semiconductor |
1 / 11 page 3.3V 3.2Gbps CML Low Power Limiting Post Amplifier with TTL LOS SY88973BL MLF and MicroLeadFrame are registered trademark 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 M9999-020207-A hbwhelp@micrel.com or (408) 955-1690 General Description The SY88973BL 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 SY88973BL quantizes these signals and outputs typically 800mVPP voltage-limited waveforms. The SY88973BL operates from a single +3.3V ±10% power supply, over an industrial temperature range of –40°C to +85°C. With its wide bandwidth and high gain, signals with data rates up to 3.2Gbps and as small as 10mVPP can be amplified to drive devices with CML inputs or AC-coupled PECL inputs. The SY88973BL incorporates a loss-of-signal (LOS), open- collector TTL output with external 4.75kΩ to 10kΩ pull-up resistor to fully comply with SFP MSA. 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. LOS can be fed back to the enable (/EN) input to maintain output stability under a loss-of-signal condition. /EN de-asserts the true output signal without removing the input signal. Typically, 4.6dB LOS hysteresis is provided to prevent chattering. Please see Micrel’s website at www.micrel.com for a complete selection of optical module ICs. All support documentation can be found on Micrel’s web site at: www.micrel.com. Typical Performance Features • Multi-rate up to 3.2Gbps operation • Wide gain-bandwidth product • 38dB differential gain • 2GHz 3dB bandwidth • Low noise 50Ω CML data outputs – 800mVPP output swing – 60ps edge rates – 5psRMS typ. random jitter – 15psPP typ. deterministic jitter • Chatter-free, Loss-of-Signal (LOS) output – No internal pull-up resistor− fully compliant with SFP MSA – 4.6dB electrical hysteresis – OC-TTL output • Programmable LOS sensitivity using single external resistor • Internal 50Ω data input termination • TTL /EN input allows feedback from LOS • Wide operating range: – Single 3.3V ±10% – –40°C to +85°C industrial temperature range • Available in a tiny 3mm x 3mm 16-pin MLF® package Applications • 1.25Gbps and 2.5Gbps Gigabit Ethernet • 1.062Mbps and 2.125Gbps Fibre Channel • 155Mbps, 622Gbps, 1.25Gbps, and 2.5Gbps SONET/SDH • Gigabit interface converter (GBIC) • Small form factor (SFF) and small form factor pluggable (SFP) transceivers • Parallel 10G Ethernet • High-gain line driver and line receiver Markets • Telecom/datacom • Optical transceiver |
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