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SY88403BL

Part Number	SY88403BL
Manufacturer	Micrel Semiconductor
Description	CML Low-Power Limiting Post Amplifier
Published	May 2, 2007
Detailed Description	SY88403BL 3.3V 4.25Gbps CML Low-Power Limiting Post Amplifier with TTL LOS General Description The SY88403BL is a low-p...
Datasheet	SY88403BL PDF File

Overview

SY88403BL 3.
3V 4.
25Gbps CML Low-Power Limiting Post Amplifier with TTL LOS General Description The SY88403BL is a low-power limiting post amplifier optimized for copper applications.
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 SY88403BL quantizes these signals and outputs typically 800mVPP voltage-limited waveforms.
The SY88403BL operates from a single +3.
3V ±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 4.
25Gbps and as small as 5mVPP can be amplified to drive devices with CML inputs or AC-coupled PECL inputs.
The SY88403BL incorporates a loss-of-signal (LOS) open-collector TTL output with internal 4.
75kΩ 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 bar (/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, 3.
5dB LOS hysteresis is provided to prevent chattering.
All support documentation can be found on Micrel’s web site at: www.
micrel.
com.
Typical Performance Features • Multi-rate up to 4.
25Gbps operation • 5mVPP input sensitivity • Low noise 50Ω CML data outputs – 800mVpp output swing – 60ps edge rates – 1psRMS typ.
random jitter – 10psPP typ.
deterministic jitter • Chatter-free Loss-of-Signal (LOS) output – 3.
5dB electrical hysteresis – OC-TTL output with internal 4.
75kΩ pull-up resistor • Programmable LOS sensitivity using single external resistor • Internal 50Ω data input termination • TTL /EN input allows feedback from LOS • Wide operating range: – Single 3.
3V ±10% power supply – Industrial temperature ra...

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SY88403BL CML Low-Power Limiting Post Amplifier - Micrel Semiconductor

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