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SY88703V Datasheet(PDF) 1 Page - Micrel Semiconductor

Part No. SY88703V
Description  3.3V/5V 622Mbps PECL LOW-POWER LIMITING POST AMPLIFIER W/TTL LOS
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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SY88703V Datasheet(HTML) 1 Page - Micrel Semiconductor

   
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1
SY88703V
Micrel, Inc.
M9999-072505
hbwhelp@micrel.com or (408) 955-1690
3.3V/5V 622Mbps PECL LOW-POWER
LIMITING POST AMPLIFIER W/TTL LOS
SY88703V
Rev.: B
Amendment: /0
Issue Date:
July 2005
TYPICAL APPLICATIONS CIRCUIT
APPLICATIONS
s 622Mbps SONET/SDH
s Small form factor transceivers
s High-gain line driver and line receiver
s Single 3.3V or 5V power supply
s Up to 622Mbps operation
s Low noise PECL data outputs
s Chatter-free TTL Loss-of-Signal (LOS) output
s TTL /EN input
s Programmable LOS level set (LOS
LVL)
s Available in a tiny 10-pin MSOP (3mm) package
FEATURES
DESCRIPTION
The SY88703V 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 SY88703V
quantizes these signals and outputs PECL level waveforms.
The SY88703V operates from a single +3.3V or +5V
power supply, over temperatures ranging from –40
°C to
+85
°C. With its wide bandwidth and high gain, signals with
data rates up to 622Mbps and as small as 5mVp-p can be
amplified to drive devices with PECL inputs.
The SY88703V generates a TTL LOS 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
LOS
LVL and deasserts low otherwise. /EN deasserts the
true output signal without removing the input signal. Typically
4.6dB loss-of-signal hysteresis is provided to prevent
chattering.
VCC
VCC
/EN
GND
GND
To
CDR
SY88703V
3k
From
Transimpedance
Amp.
DOUT
/DOUT
VREF
VCC
LOSLVL
DIN
/DIN
0.1
µF
0.1
µF
0.1
µF
0.1
µF
LOS
50
2k
50
100
Rpd
Rpd
For 3.3V, Rpd = 120Ω
For 5V, Rpd = 220Ω


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