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SY88289AL Dataheets PDF



Part Number SY88289AL
Manufacturers Micrel Semiconductor
Logo Micrel Semiconductor
Description CML Low-Power Limiting Post Amplifier
Datasheet SY88289AL DatasheetSY88289AL Datasheet (PDF)

SY88289AL 3.3V, 3.2Gbps CML Low-Power Limiting Post Amplifier with TTL Loss-of-Signal General Description Features The SY88289AL low-power limiting post amplifier is • Single 3.3V power supply designed for use in fiber-optic receivers. The device • 125Mbps to 3.2Gbps operation connects to typical transimpedance amplifiers (TIAs). • Low-noise CML data outputs The linear signal output from TIAs can contain • Chatter-free open-collector TTL Loss-of-signal (LOS) significant amounts of noise and m.

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SY88289AL 3.3V, 3.2Gbps CML Low-Power Limiting Post Amplifier with TTL Loss-of-Signal General Description Features The SY88289AL low-power limiting post amplifier is • Single 3.3V power supply designed for use in fiber-optic receivers. The device • 125Mbps to 3.2Gbps operation connects to typical transimpedance amplifiers (TIAs). • Low-noise CML data outputs The linear signal output from TIAs can contain • Chatter-free open-collector TTL Loss-of-signal (LOS) significant amounts of noise and may vary in amplitude output with internal 4.75kΩ pull-up resistor over time. The SY88289AL quantizes these signals and • TTL /EN input outputs CML-level waveforms. • Internal 50Ω input termination The SY88289AL operates from a single +3.3V power supply, over temperatures ranging from –40oC to +85oC. • Programmable LOS level set (LOSLVL) With its wide bandwidth and high gain, signals with data • Ideal for multi-rate applications rates up to 3.2Gbps, and as small as 10mVP-P, can be • Available in a tiny 3mmx3mm 16-pin MLF® package amplified to drive devices with CML inputs or ACcoupled CML/PECL inputs. Applications The SY88289AL generates a loss-of-signal (LOS) open• APON, BPON, EPON, GEPON, and GPON collector TTL output. A programmable loss-of-signal • Gigabit Ethernet level-set pin (LOSLVL) sets the sensitivity of the input • Fibre Channel amplitude detection. LOS asserts high if the input • SONET/SDH:OC-3/12/24/48 – STM 1/4/8/16 amplitude falls below the threshold set by LOSLVL and www.DataSheet4U.com de-asserts low otherwise. The enable bar input (/EN) • High-gain line driver and line receiver de-asserts the true output signal without removing the Markets input signal. The LOS output can be fed back to the /EN input to maintain output stability under a loss-of-signal • Optical transceivers condition. Typically, 3.5dB LOS hysteresis is provided to • Datacom/telecom prevent chattering. All support documentation can be found on Micrel’s web site at www.micrel.com. Typical Application MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. 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-B [email protected] or (408) 955-1690 Micrel, Inc. SY88289AL Ordering Information Part Number SY88289ALMG SY88289ALMGTR(1) Note: 1. Tape and Reel. Package Type MLF-16 MLF-16 Operating Range Industrial Industrial Package Marking 289A with Pb-Free bar line indicator 289A with Pb-Free bar line indicator Lead Finish NiPdAu Pb-Free NiPdAu Pb-Free Pin Configuration 16-Pin MLF® (MLF-16) Pin Description Pin Number 1, 12 2 3 4, 9 5 6 Pin Name VCC DIN /DIN GND VREF LOSLVL Input Type Power Supply Data Input Data Input Ground 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. Open-collector TTL output w/internal 4.75kΩ pull-up resistor CML Output CML Output TTL Input: Default is HIGH. Loss-of-signal: asserts high when the data input amplitude rises above 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 25kΩ pull-up resistor and will default to a logic HIGH state if left open. Pin Function 7, 14, 15, 16 8 N/C LOS 10 11 13 /DOUT DOUT /EN February 2007 2 M9999-021207-B [email protected] or (408) 955-1690 Micrel, Inc. SY88289AL Absolute Maximum Ratings(1) Supply Voltage (VCC) .................................... 0V to +4.0V Input Voltage (DIN, /DIN) ................................... 0 to VCC Output Current (IOUT) ............................................+25mA /EN Voltage ........................................................ 0 to VCC VREF Current……………………………-800uA to + 500uA LOSLVL Voltage.............................................. VREF to VCC Lead Temperature (soldering, 20sec.) .................. 260°C Storage Temperature (Ts) .....................-65°C to +150°C Operating Ratings(2) Supply Voltage (VCC)..............................+3.0V to +3.6V Ambient Temperature (TA)....................–40°C to +85°C Junction Temperature (TJ) ..................–40°C to +125°C Junction Thermal Resistance MLF® (θJA) Still-air ..................................................... 60°C/W MLF® (ΨJB) Junction-to-board .....................................38oC/W DC Electrical Characteristics VCC = 3.0V to 3.6V; RL = 50Ω to VCC; TA = –40°C to +85°C. Symbol ICC LOSLVL VOH VOL VOFFSET ZO ZI VREF Parameter Power Supply Current LOSLVL Voltage CML Output HIGH Voltage CML Output LOW Voltage Differential Output Offset Single-Ended Output Impedance Single-Ended Input Impedance Reference Voltage Vcc =3.3V Condition No output load VREF VCC-.


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