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SY88973VEY Datasheet(PDF) 1 Page - Micrel Semiconductor |
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SY88973VEY Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 11 page 1 SY88973V Micrel, Inc. M9999-110905 hbwhelp@micrel.com or (408) 955-1690 DESCRIPTION s Multi-rate up to 3.2Gbps operation s Wide gain-bandwidth product • 38dB differential gain • 2GHz 3dB bandwidth s Low noise 50 Ω CML data outputs • 800mVPP output swing • 60ps edge rates • 5psRMS typ. random jitter • 15psPP typ. deterministic jitter s Chatter-free, Loss-of-Signal (LOS) output • 4.6dB electrical hysteresis • OC-TTL output with internal 4.75k Ω pull-up resistor s Programmable LOS sensitivity using single external resistor s Internal 50 Ω data input termination s TTL /EN input allows feedback from LOS s Wide operating range • Single 3.3V ±10% or 5V ±10% power supply • –40 °C to +85°C industrial temperature range s Available in tiny 10-pin EPAD-MSOP and 16-pin MLF™ packages FEATURES 3.3V/5V 3.2Gbps CML LOW-POWER LIMITING POST AMPLIFIER W/TTL LOS SY88973V APPLICATIONS s 1.25Gbps and 2.5Gbps Gigabit Ethernet s 1.062Mbps and 2.125Gbps Fibre Channel s 155Mbps, 622Gbps, 1.25Gbps, and 2.5Gbps SONET/ SDH s Gigabit interface converter (GBIC) s Small form factor (SFF) and small form factor pluggable (SFP) transceivers s Parallel 10G Ethernet s High-gain line driver and line receiver Rev.: C Amendment: /0 Issue Date: November 2005 MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc. The SY88973V 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 SY88973V quantizes these signals and outputs typically 800mVPP voltage-limited waveforms. The SY88973V operates from a single +3.3V ±10% or +5V ±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 SY88973V incorporates a loss-of-signal (LOS), open- collector TTL output with internal 4.75k Ω pull-up resistor. 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. 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. The following table summarizes the differences between devices in Micrel’s latest family of Limiting Amplifiers. All support documentation can be found on Micrel’s web site at www.micrel.com. Integrated 50 Ω LOS Active LOW Part Number Input Termination or SD or HIGH Enable SY88773V No LOS LOW SY88823V No SD HIGH SY88843V Yes SD HIGH SY88973V Yes LOS LOW Table 1. Limiting Amplifiers Selection Guide TYPICAL PERFORMANCE 3.3V, 25°C, 10mVpp Input @3.2Gbps 2 31–1 PRBS, R LOAD = 50Ω to VCC TIME (50ps/div.) |
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