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SY88893V Datasheet(PDF) 1 Page - Micrel Semiconductor

Part No. SY88893V
Description  3.3V/5V 155Mbps PECL LOW-POWER LIMITING POST AMPLIFIER W/TTL SIGNAL DETECT
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

SY88893V Datasheet(HTML) 1 Page - Micrel Semiconductor

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1
SY88893V
Micrel, Inc.
M9999-081005
hbwhelp@micrel.com or (408) 955-1690
3.3V/5V 155Mbps PECL LOW-POWER
LIMITING POST AMPLIFIER W/TTL
SIGNAL DETECT
SY88893V
Rev.: B
Amendment: /0
Issue Date:
August 2005
TYPICAL APPLICATIONS CIRCUIT
APPLICATIONS
s 155Mbps 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 155Mbps operation
s Low noise PECL data outputs
s Chatter-free TTL Signal Detect (SD) output
s TTL EN input
s Programmable SD level set (SD
LVL)
s Available in tiny 10-pin MSOP (3mm
××××× 3mm) package
FEATURES
DESCRIPTION
The SY88893V 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 SY88893V
quantizes these signals and outputs PECL level waveforms.
The SY88893V 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 155Mbps and as small as 5mVp-p can be
amplified to drive devices with PECL inputs.
The SY88893V generates a TTL SD output. A
programmable signal-detect level set pin (SD
LVL) sets the
sensitivity of the input amplitude detection. SD asserts high
if the input amplitude rises above the threshold set by SD
LVL
and deasserts low otherwise. EN deasserts the true output
signal without removing the input signal. Typically 6dB SD
hysteresis is provided to prevent chattering.
VCC
EN
GND
GND
To
CDR
SY88893V
100k
Ω 0.1µF
From
Transimpedance
Amp.
DOUT
/DOUT
VREF
VCC
SDLVL
DIN
/DIN
0.1
µF
0.1
µF
0.1
µF
0.1
µF
SD
50
50
Rpd
Rpd
For 3.3V, Rpd = 120Ω
For 5V, Rpd = 220Ω


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