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SY88149HALMG Datasheet(PDF) 1 Page - Micrel Semiconductor |
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SY88149HALMG Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 11 page SY88149HAL 1.25Gbps Burst-Mode Limiting Amplifier with Ultra-Fast Signal Assert Timing Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( 408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com July 2011 M9999-072511-A hbwhelp@micrel.com or (408) 955-1690 General Description The SY88149HAL is a high-sensitivity, burst-mode capable, limiting-post amplifier designed for FTTH PON optical line terminal (OLT) receiver applications. The SY88149HAL satisfies the strict timing restrictions of the GPON standards by providing ultra-fast loss-of-signal (LOS) or signal-detect (SD) output. Auto reset and manual reset options are provided to control LOS/SD output timing. The device can be connected to burst-mode capable transimpedance amplifiers (TIAs) using AC or DC coupling. The SY88149HAL generates a high-gain LVTTL LOS or SD output. A programmable LOS/SD level set pin (LOS/SDLVL) sets the sensitivity of the input amplitude detection. For increased flexibility, this device also includes an option to select between LOS or SD output by using the LOS/SD SEL pin. The LOS/SD output can be fed back to the JAM input to maintain data output stability under an invalid input signal conditions. Typically, 3dB LOS/SD hysteresis is provided to prevent chattering. The SY88149HAL operates from a single +3.3V power supply, over temperatures ranging from –40 oC to +85oC. With its wide bandwidth and high gain, signals up to 1.25Gbps and as small as 5mVpp can be amplified to LVPECL levels. All support documentation can be found on Micrel’s web site at: www.micrel.com. Features • <5ns SD Assert (LOS Deassert) time • Option to AUTO RESET or manual RESET LOS/SD output • Selectable LOS/SD output option • High-sensitivity LOS/SD signal detect • Low-noise LVPECL data outputs • Squelching function to maintain output stability • Programmable LOS/SD level set (LOS/SDLVL) • 5mVpp input sensitivity • 1.25Gbps operation • Single 3.3V power supply • Available in a 16-pin (3mm × 3mm) QFN® package Applications • GE-PON/GPON • Gigabit Ethernet • Fibre Channel • OC-3/12/24 SONET/SDH • High-gain line driver and line receiver • Low-gain TIA interface Markets • FTTH PON • Datacom/Telecom • Optical transceiver |
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