SY88289ALMG-TR
SY88289ALMG-TR Datasheet
SY88289AL
| Part | Datasheet |
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SY88289ALMG-TR |
SY88289ALMG-TR (pdf) |
| Related Parts | Information |
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SY88289ALMG |
SY88289ALMG |
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| SY88289AL 3.3V, 3.2Gbps CML Low-Power Limiting Post Amplifier with TTL Loss-of-Signal 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 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 ACcoupled CML/PECL inputs. The SY88289AL generates a loss-of-signal LOS opencollector 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 • 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 pull-up resistor • TTL /EN input • Internal input termination • Programmable LOS level set LOSLVL • Ideal for multi-rate applications • Available in a tiny 3mmx3mm 16-pin QFN package • 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 Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 408 944-0800 • fax + 1 408 474-1000 • February 2007 M9999-021207-B or 408 955-1690 Micrel, Inc. Ordering Information Package Type SY88289ALMG QFN-16 SY88289ALMGTR 1 QFN-16 Operating Range Industrial Industrial Note Tape and Reel. Pin Configuration Package Marking 289A with Pb-Free bar line indicator 289A with Pb-Free bar line indicator SY88289AL Lead Finish NiPdAu Pb-Free NiPdAu Pb-Free 16-Pin QFN Pin Description Pin Number Pin Name 1, 12 /DIN VREF LOSLVL 7, 14, 15, 16 8 N/C LOS /DOUT DOUT Type Power Supply Data Input Data Input Ground Input Open-collector TTL output w/internal pull-up resistor CML Output CML Output TTL Input Default is HIGH. Pin Function Positive power supply. True data input. Complementary data input. Device ground. Reference voltage Placing a capacitor here to VCC helps stabilize LOSLVL. Loss-of-signal Level Set a resistor from this pin to VCC sets the threshold for the data input amplitude at which LOS will be asserted. No connect. Loss-of-signal asserts high when the data input amplitude rises below the threshold sets by LOSLVL. Complementary data output. True data output. /Enable This input enables the outputs when it is LOW. Note that this input is internally connected to a pull-up resistor and will default to a logic HIGH state if left open. February 2007 M9999-021207-B or 408 955-1690 Micrel, Inc. Absolute Maximum Ratings 1 |
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