Microchip Technology Inc

SY88149HL

Status: In Production

Features:

  • <5ns SD Assert (LOS Deassert) time
  • Option to AUTO RESET or manual RESET LOS/SD output
  • Selectable LOS/SD output option
  • High-sensitivity LOS/SD signal detect
  • Low-noise LVPECL data outputs
  • Squelching function to maintain output stability
  • Programmable LOS/SD level set (LOS/SDLVL)
  • 5mVPP input sensitivity
  • 1.25Gbps operation
  • Single 3.3V power supply
  • Available in a 16-pin (3mm x 3mm) QFN package
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Device Overview

Summary

The SY88149HAL is a high-sensitivity, burst-mode capable, limiting-post amplifier designed for FTTH PON optical line terminal (OLT) receiver applications. The SY88149HAL satisfies the strict timing restrictions of the GPON standards by providing ultra-fast loss-of-signal (LOS) or signal-detect (SD) output. Auto reset and manual reset options are provided to control LOS/SD output timing. The device can be connected to burst-mode capable transimpedance amplifiers (TIAs) using AC or DC coupling. The SY88149HAL generates a high-gain LVTTL LOS or SD output. A programmable LOS/SD level set pin (LOS/SD LVL) sets the sensitivity of the input amplitude detection. For increased flexibility, this device also includes an option to select between LOS or SD output by using the LOS/SD SEL pin . The LOS/SD output can be fed back to the JAM input to maintain data output stability under an invalid input signal conditions. Typically, 3dB LOS/SD hysteresis is provided to prevent chattering. The SY88149HAL operates from a single +3.3V power supply, over temperatures ranging from -40°C to +85°C. With its wide bandwidth and high gain, signals up to 1.25Gbps and as small as 5mVPP can be amplified to LVPECL levels.

Additional Features
    • <5ns SD Assert (LOS Deassert) time
    • Option to AUTO RESET or manual RESET LOS/SD output
    • Selectable LOS/SD output option
    • High-sensitivity LOS/SD signal detect
    • Low-noise LVPECL data outputs
    • Squelching function to maintain output stability
    • Programmable LOS/SD level set (LOS/SDLVL)
    • 5mVPP input sensitivity
    • 1.25Gbps operation
    • Single 3.3V power supply
    • Available in a 16-pin (3mm x 3mm) QFN package
Parametrics
Name
Value
Part Type
Fiber Optic Burst Mode Post Amplifiers
Data Rate Capability
1.25
Data Input Type
CML/PECL
Data Output Type
PECL
LOS/SD
SD & LOS (TTL)
LOS/SD Gain
1x

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