SY88289CLMG-TR

SY88289CLMG-TR Datasheet

SY88289CL

Part	Datasheet
SY88289CLMG-TR	SY88289CLMG-TR (pdf)

Related Parts	Information
SY88289CLMG	SY88289CLMG

PDF Datasheet Preview
SY88289CL 3.3V, 3.2Gbps CML Limiting Post Amplifier with High-Gain TTL Loss-of-Signal The SY88289CL low-power, high-sensitivity, 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 SY88289CL quantizes these signals and outputs CML-level waveforms. The SY88289CL 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 5mVPP can be amplified to drive devices with CML inputs or ACcoupled CML/PECL inputs. The SY88289CL generates a high-gain loss-of-signal LOS open-collector TTL output. This function has a high-gain input stage for increased LOS sensitivity. 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 sets 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 • High-gain LOS • Chatter-free open-collector TTL Loss-of-Signal LOS output with an internal pull -up resistor • TTL /EN input • Programmable LOS level set LOSLVL • Ideal for multi-rate applications • Available in a tiny 3mm x 3mm 16-pin QFN package • APON, BPON, EPON, GEPON and GPON • Gigabit Ethernet • 1X and 2X Fibre Channel • SONET/SDH OC 3/12/24/48 STM 1/4/8/16 • High-gain line driver and line receiver • Low-gain TIA interface Markets • FTTP/FTTH • Optical transceivers • Datacom/Telecom • Long reach FOM 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. SY88289CL Ordering Information Part Number SY88289CLMG Package Type QFN-16 SY88289CLMGTR 1 QFN-16 Operating Range Industrial Industrial Note Tape and Reel. Pin Configuration Package Marking 289C with Pb-Free bar line indicator 289C with Pb-Free bar line indicator Lead Finish NiPdAu Pb-Free NiPdAu Pb-Free 16-Pin QFN February 2007 M9999-021207-B or 408 955-1690 Micrel, Inc. SY88289CL 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 falls 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

PDF Datasheet Preview

SY88289CL
3.3V, 3.2Gbps CML Limiting Post Amplifier with High-Gain TTL Loss-of-Signal

The SY88289CL low-power, high-sensitivity, 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 SY88289CL quantizes these signals and outputs CML-level waveforms.

The SY88289CL 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 5mVPP can be amplified to drive devices with CML inputs or ACcoupled CML/PECL inputs.

The SY88289CL generates a high-gain loss-of-signal LOS open-collector TTL output. This function has a high-gain input stage for increased LOS sensitivity. 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 sets 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
• High-gain LOS
• Chatter-free open-collector TTL Loss-of-Signal LOS
output with an internal pull -up resistor
• TTL /EN input
• Programmable LOS level set LOSLVL
• Ideal for multi-rate applications
• Available in a tiny 3mm x 3mm 16-pin QFN
package
• APON, BPON, EPON, GEPON and GPON
• Gigabit Ethernet
• 1X and 2X Fibre Channel
• SONET/SDH OC 3/12/24/48 STM 1/4/8/16
• High-gain line driver and line receiver
• Low-gain TIA interface

Markets
• FTTP/FTTH
• Optical transceivers
• Datacom/Telecom
• Long reach FOM

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.

SY88289CL
Ordering Information

Part Number SY88289CLMG

Package Type QFN-16

SY88289CLMGTR 1

QFN-16

Operating Range Industrial

Industrial

Note Tape and Reel.

Pin Configuration

Package Marking 289C with Pb-Free bar line indicator
289C with Pb-Free bar line indicator

Lead Finish

NiPdAu Pb-Free

NiPdAu Pb-Free
16-Pin QFN

February 2007

M9999-021207-B
or 408 955-1690

Micrel, Inc.

SY88289CL

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 falls 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

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived SY88289CLMG-TR Datasheet file may be downloaded here without warranties.

Datasheet ID: SY88289CLMG-TR 647952