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SY89840U

Status: In Production

Features:

  • Selects between two sources, and provides a glitch-free, stable LVPECL output
  • Wide operating frequency: 1kHz to >1.5GHz
  • <880ps In-to-Out tpd
  • <190ps tr/tf
  • Unique patent-pending input isolation design minimizes crosstalk
  • Fail-safe input prevents oscillations
  • 140fsRMS phase jitter (typ.)
  • <0.7psRMS MUX crosstalk induced jitter
  • Unique patent-pending input termination and VT pin accepts DC-coupled and AC-coupled inputs (CML, PECL, LVDS)
  • 800mV LVPECL output swing
  • 2.5V ±5% or 3.3V ±10% supply voltage
  • -40°C to +85°C industrial temperature range
  • Available in 16-pin (3mm x 3mm) QFN package
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The SY89840U is a low jitter PECL, 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89840U unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt" pulses during switchover. In addition, a unique Fail-Safe Input protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 100mV).The differential input includes Micrel's unique, 3-pin input termination architecture that allows customers to interface to any differential signal (AC- or DC-coupled) as small as 100mV (200mVpp) without any level shifting or termination resistor networks in the signal path. The output is 800mV, 100K compatible LVPECL with fast rise/fall times guaranteed to be less than 190ps.The SY89840U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89840U is part of Micrel's high-speed, Precision Edge® product line.

Additional Features
    • Selects between two sources, and provides a glitch-free, stable LVPECL output
    • Guaranteed AC performance over temperature and supply voltage:
      • Wide operating frequency: 1kHz to >1.5GHz
      • <880ps In-to-Out tpd
      • <190ps tr/tf
    • Unique patent-pending input isolation design minimizes crosstalk
    • Fail-safe input prevents oscillations
    • Ultra-low jitter design:
      • 140fsRMS phase jitter (typ.)
      • <0.7psRMS MUX crosstalk induced jitter
    • Unique patent-pending input termination and VT pin accepts DC-coupled and AC-coupled inputs (CML, PECL, LVDS)
    • 800mV LVPECL output swing
    • 2.5V ±5% or 3.3V ±10% supply voltage
    • -40°C to +85°C industrial temperature range
    • Available in 16-pin (3mm x 3mm) QFN package
Parametrics
Name
Value
Product Type
Multiplexers
Description
2:01
Input
ANY
Output
LVPECL
Supply Voltage
2.5/3.3V
Max Freq (GHz)
2
Max Prop Delay (ps)
880
Icc (mA)
65
OE
False
RPE
True
FSI
True
Input Mux
False
Input EQ
False
Channels
Single
Output Type
LVPECL
Output Voltage
2.5/3.3V

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
SY89840UMG-TR
0.021300
0.801700
16
VQFN
3x3x1.00mm
NiPdAu
e4
SY89840UMG
0.021300
0.050000
16
VQFN
3x3x1.00mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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