Microchip Technology Inc
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SY88343DL

Status: In Production

Features:

  • Single 3.3V power supply
  • 155Mbps to 3.2Gbps operation
  • Low-noise CML data outputs
  • High gain LOS
  • Chatter-free Open-Collector TTL loss-of-signal (LOS) output with internal 4.75kΩ pull-up resistor
  • TTL /EN input
  • Programmable SD level set (SD LVL
  • Ideal for multi-rate applications
  • Available in a tiny 10-pin EPAD MSOP and 16-pin MLF®package
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Device Overview

Summary

The SY88343DL low-power, high-sensitivity, 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 SY88343DL quantizes these signals and outputs CML level waveforms. The SY88343DL operates from a single +3.3V power supply, over temperatures ranging from -40°C to +85°C. With its wide bandwidth, high gain, and signals with data rates up to 3.2Gbps and as small as 5mVPP can be amplified to drive devices with CML inputs or AC-coupled CML/PECL inputs. The SY88343DL generates a high-gain loss-of-signal (LOS) open-collector TTL output. This function has a high-gain input stage for increased LOS sensitivity. A programmable loss-of-signal level set pin (LOS LVL) sets the sensitivity of the input amplitude detection. LOS asserts high if the input amplitude falls below the threshold set by LOS LVL and de-asserts low otherwise. The enable bar input (/EN) de-asserts the true output signal without removing the input signal. The LOS output can be fed back to the /EN input to maintain output stability under a loss-of-signal condition. Typically, 3.5dB LOS hysteresis is provided to prevent chattering.

Additional Features
    • Single 3.3V power supply
    • 155Mbps to 3.2Gbps operation
    • Low-noise CML data outputs
    • High gain LOS
    • Chatter-free Open-Collector TTL loss-of-signal (LOS) output with internal 4.75kΩ pull-up resistor
    • TTL /EN input
    • Programmable SD level set (SD LVL
    • Ideal for multi-rate applications
    • Available in a tiny 10-pin EPAD MSOP and 16-pin MLF®package
Parametrics
Name
Value
Part Type
Fiber Optic Post Amplifiers
Data Rate Capability
3.2
Data Input Type
PECL
Data Output Type
CML
LOS/SD
LOS (TTL)
LOS/SD Gain
4x
RC Time Constant
3.5
Hysteresis Typ (dB)
20x

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