sy88289hl Micrel Semiconductor, sy88289hl Datasheet

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sy88289hl

Manufacturer Part Number
sy88289hl
Description
Ic Cml Limiting Amp 16mlf
Manufacturer
Micrel Semiconductor
Datasheet

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sy88289hlMG
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General Description
The SY88289HL low-power, high-sensitivity, limiting
post amplifier is designed for use in fiber-optic receivers.
The
amplifiers (TIAs). The linear signal output from TIAs can
contain significant amounts of noise and may vary in
amplitude over time. The SY88289HL quantizes these
signals and outputs CML-level waveforms.
The SY88289HL operates from a single +3.3V power
supply, over temperatures ranging from –40
With its wide bandwidth, high gain, and signals with data
rates up to 3.2Gbps and as small as 4mV
amplified to drive devices with CML/PECL inputs.
The SY88289HL 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 (LOS
the sensitivity of the input amplitude detection. LOS
asserts high if the input amplitude falls below the
threshold sets by LOS
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
Typically, 3.5dB LOS hysteresis is provided to prevent
chattering.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Typical Application
August 2007
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
device
stability
connects
under
LVL
and de-asserts low otherwise.
to
a
loss-of-signal
typical
transimpedance
PP
o
C to +85
, it can be
condition.
LVL
) sets
o
C.
Amplifier with High-sensitivity Loss-of-Signal
Features
• High input sensitivity: 4mV
• I/O compatible to Analog Devices’ ADN2891
• Single 3.3V power supply
• 125Mbps to 3.2Gbps operation
• Ideal for multi-rate applications
• Low-noise CML data outputs
• High-sensitivity Loss-of-Signal (LOS) detection
• Chatter-free open-collector TTL Loss-of-Signal (LOS)
• TTL /EN input
• Programmable LOS level set (LOS
• Available in a tiny (3mm x 3mm) 16-pin QFN
Applications
• PON
• SFP/SFF/GBIC optical transceivers
• Gigabit Ethernet
• 1X and 2X Fibre Channel
• SONET/SDH: OC 3/12/24/48 – STM 1/4/8/16
• Line driver and line receiver
Markets
• FTTX
• Datacom/Telecom
3.3V, 3.2Gbps High-Gain CML Limiting
output with an internal 4.75kΩ pull -up resistor
package
SY88289HL
Detection
hbwhelp@micrel.com
PP
LVL
)
or (408) 955-1690
M9999-082007-A

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sy88289hl Summary of contents

Page 1

... The SY88289HL quantizes these signals and outputs CML-level waveforms. The SY88289HL operates from a single +3.3V power supply, over temperatures ranging from –40 With its wide bandwidth, high gain, and signals with data rates ...

Page 2

... This input enables the outputs when it is LOW. Note HIGH. that this input is internally connected to a 25kΩ pull-up resistor and will default to a logic HIGH state if left open. 2 Lead Finish 289H NiPdAu Pb-Free 289H NiPdAu Pb-Free Pin Function . LVL . LVL M9999-082007-A hbwhelp@micrel.com or (408) 955-1690 SY88289HL sets CC ...

Page 3

... Still-air ..................................................... 61°C Junction-to-board ..................................... 38 Min Typ 42 V REF V -0.020 V -0.005 -0.475 V -0.400 -1.28 CC GND+2.0 Min Typ 2.0 -300 2.4 2.0 hbwhelp@micrel.com or (408) 955-1690 SY88289HL o C/W Max Units -0.350 V ± Max Units 0 µA 100 µA µ ...

Page 4

... Note 8 R LOSLVL = 5kΩ, Note 7 R LOSLVL = 100Ω, Note 8 R LOSLVL = 100Ω, Note 8 R LOSLVL = 100Ω, Note 7 R LOSLVL = 10mV . 10mV . SY88289HL Min Typ Max 60 120 1800 700 800 950 4 ...

Page 5

... Micrel, Inc. Typical Operating Characteristics Functional Characteristics August 2007 5 hbwhelp@micrel.com SY88289HL M9999-082007-A or (408) 955-1690 ...

Page 6

... Thus, the optical hysteresis half the electrical hysteresis in dB given in the data sheet. Since the SY88289HL is an electrical device, this data sheet refers to hysteresis in electrical terms. With 3.5dB LOS hysteresis, a voltage factor of 1.5 is required to assert or de-assert LOS. ...

Page 7

... Micrel, Inc. Figure 2. Input Structure Figure 4. Input Structure August 2007 Figure 1. V and V Definition IS ID Figure 5. LOS 7 SY88289HL Figure 3. Output Structure Setting Circuit LVL M9999-082007-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 8

... Micrel, Inc. Package Information August 2007 16-Pin (3mm x 3mm) QFN 8 SY88289HL M9999-082007-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 9

... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. August 2007 PCB Thermal Consideration for 16-Pin QFN Package © 2007 Micrel, Incorporated. 9 SY88289HL M9999-082007-A hbwhelp@micrel.com or (408) 955-1690 ...

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