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SY88315BLEY Datasheet(PDF) 1 Page - Micrel Semiconductor |
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SY88315BLEY Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 10 page SY88315BL 3.3V, 3.2Gbps CML Low-Power Limiting Post Amplifier w/TTL Signal Detect 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-D hbwhelp@micrel.com or (408) 955-1690 General Description The SY88315BL 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 SY88315BL quantizes these signals and outputs CML level waveforms. The SY88315BL operates from a single +3.3V +10% power supply, over temperatures ranging from –40 oC to +85 oC. 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 CML/PECL inputs. The SY88315BL generates a signal-detect (SD) open- collector TTL output. A programmable signal-detect level set pin (SDLVL) sets the sensitivity of the input amplitude detection. SD asserts high if the input amplitude rises above the threshold set by SDLVL and de-asserts low otherwise. The enable input (EN) de-asserts the true output signal without removing the input signal. The SD output can be fed back to the EN input to maintain output stability under loss-of-signal condition. Typically, 3.4dB SD hysteresis is provided to prevent chattering. Datasheet and support documentation cab be found on Micrel’s web site at: www.micrel.com. Features • Single 3.3V power supply • DC to 3.2Gbps operation • Low-noise CML data outputs • Chatter-free Open-Collector TTL signal detect (SD) output with internal 4.75k Ω pull-up resistor • TTL EN input • Internal 50 Ω input termination • Programmable SD level set (SD LVL) • Ideal for multi-rate applications • Available in a tiny 10-pin EPAD MSOP and 16-pin QFN package Applications • APON/BPON, EPON, and GPON • Gigabit Ethernet • Fibre Channel • OC-3 and OC-12/24 SONET/SDH • High-gain line driver and line receiver Markets • FTTP • Optical transceivers • Datacom/telecom • Low-gain TIA interface |
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