SY88289CL
3.3V, 3.2Gbps CML Limiting Post Amplifier
with High-Gain TTL Loss-of-Signal
General Description
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 鈥?0
o
C to +85
o
C.
With its wide bandwidth and high gain, signals with data
rates up to 3.2Gbps and as small as 5mV
PP
can be
amplified to drive devices with CML inputs or AC-
coupled 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 (LOS
LVL
) sets
the sensitivity of the input amplitude detection. LOS
asserts high if the input amplitude falls below the
threshold sets by LOS
LVL
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鈥檚 web
site at:
www.micrel.com.
Features
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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 4.75k鈩?pull-up resistor
TTL /EN input
Programmable LOS level set (LOS
LVL
)
Ideal for multi-rate applications
Available in a tiny (3mm x 3mm) 16-pin MLF
廬
package
APON, BPON, EPON, GEPON and GPON
Gigabit Ethernet
1X and 2X Fibre Channel
SONET/SDH : OC 3/12/24/48 鈥?STM 1/4/8/16
High-gain line driver and line receiver
Low-gain TIA interface
FTTP/FTTH
Optical transceivers
Datacom/Telecom
Long reach FOM
Applications
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Markets
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology.
Micrel Inc. 鈥?2180 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel +1 (408) 944-0800 鈥?fax + 1 (408) 474-1000 鈥?http://www.micrel.com
February 2007
M9999-021207-B
hbwhelp@micrel.com
or (408) 955-1690
SY88289CLMGTR相關(guān)型號(hào)PDF文件下載
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