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SY88973V Datasheet(PDF) 1 Page - Micrel Semiconductor

Part No. SY88973V
Description  3.3V/5V 3.2Gbps CML 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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SY88973V Datasheet(HTML) 1 Page - Micrel Semiconductor

 
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SY88973V
Micrel, Inc.
M9999-110905
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
s Multi-rate up to 3.2Gbps operation
s Wide gain-bandwidth product
• 38dB differential gain
• 2GHz 3dB bandwidth
s Low noise 50
CML data outputs
• 800mVPP output swing
• 60ps edge rates
• 5psRMS typ. random jitter
• 15psPP typ. deterministic jitter
s Chatter-free, Loss-of-Signal (LOS) output
• 4.6dB electrical hysteresis
• OC-TTL output with internal 4.75k
pull-up
resistor
s Programmable LOS sensitivity using single external
resistor
s Internal 50
data input termination
s TTL /EN input allows feedback from LOS
s Wide operating range
• Single 3.3V
±10% or 5V ±10% power supply
• –40
°C to +85°C industrial temperature range
s Available in tiny 10-pin EPAD-MSOP and
16-pin MLF™ packages
FEATURES
3.3V/5V 3.2Gbps CML
LOW-POWER LIMITING
POST AMPLIFIER W/TTL LOS
SY88973V
APPLICATIONS
s 1.25Gbps and 2.5Gbps Gigabit Ethernet
s 1.062Mbps and 2.125Gbps Fibre Channel
s 155Mbps, 622Gbps, 1.25Gbps, and 2.5Gbps SONET/
SDH
s Gigabit interface converter (GBIC)
s Small form factor (SFF) and small form factor
pluggable (SFP) transceivers
s Parallel 10G Ethernet
s High-gain line driver and line receiver
Rev.: C
Amendment: /0
Issue Date:
November 2005
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
The SY88973V 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 SY88973V
quantizes these signals and outputs typically 800mVPP
voltage-limited waveforms.
The SY88973V operates from a single +3.3V
±10% or
+5V
±10% power supply, over an industrial temperature
range of –40
°C to +85°C. With its wide bandwidth and high
gain, signals with data rates up to 3.2Gbps and as small as
10mVPP can be amplified to drive devices with CML inputs
or AC-coupled PECL inputs.
The SY88973V incorporates a loss-of-signal (LOS), open-
collector TTL output with internal 4.75k
Ω pull-up resistor. 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
LOSLVL and de-asserts low otherwise. LOS can be fed
back to the enable (/EN) input to maintain output stability
under a loss-of-signal condition. /EN de-asserts the true
output signal without removing the input signal. Typically
4.6dB LOS hysteresis is provided to prevent chattering.
Please see Micrel’s website at www.micrel.com for a
complete selection of optical module ICs. The following table
summarizes the differences between devices in Micrel’s
latest family of Limiting Amplifiers.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Integrated 50
LOS
Active LOW
Part Number
Input Termination
or SD
or HIGH Enable
SY88773V
No
LOS
LOW
SY88823V
No
SD
HIGH
SY88843V
Yes
SD
HIGH
SY88973V
Yes
LOS
LOW
Table 1. Limiting Amplifiers Selection Guide
TYPICAL PERFORMANCE
3.3V, 25°C, 10mVpp Input
@3.2Gbps 2
31–1 PRBS, R
LOAD = 50Ω to VCC
TIME (50ps/div.)


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