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SY88933V Datasheet(PDF) 1 Page - Micrel Semiconductor

Part No. SY88933V
Description  3.3V/5V 1.25Gbps PECL LOW-POWER LIMITING POST AMPLIFIER
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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SY88933V Datasheet(HTML) 1 Page - Micrel Semiconductor

   
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1
SY88933V
Micrel
3.3V/5V 1.25Gbps PECL LOW-POWER
LIMITING POST AMPLIFIER
w/TTL SIGNAL DETECT
SY88933V
Final
Rev.: A
Amendment: /0
Issue Date:
May 1, 2003
TYPICAL APPLICATIONS CIRCUIT
APPLICATIONS
s 1.25Gbps Ethernet
s 1.55Mbps and 622Mbps SONET/SDH
s High-gain line driver and line receiver
s 531Mbps and 1062Mbps Fibre Channel
s Gigabit interface converter
s Single 3.3V or 5V power supply
s DC to 1.25Gbps operation
s Low noise PECL data outputs
s Chatter-free OC-TTL signal setect (SD) output with
internal 6.75k
pull-up resistor
s TTL EN input
s Programmable SD level set (SD
LVL)
s Available in a tiny 10-pin MSOP (3mm) package
FEATURES
DESCRIPTION
The SY88933V 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 SY88933V
quantizes these signals and outputs PECL level waveforms.
The SY88933V 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 1.25Gbps and as small as 5mVp-p can be
amplified to drive devices with PECL inputs.
The SY88933V 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 4.6dB
SD hysteresis is provided to prevent chattering.
VCC
EN
GND
GND
To
CDR
SY88933V
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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