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SY89837U

Status: In Production

Features:

  • Selects between two clocks, and provides 8 precision, low skew LVPECL output copies
  • Guaranteed AC performance over temperature and supply voltage:
  • <975ps in-to-out tpd
  • <180ps tr/tf
  • <40ps output-to-output skew
  • Unique input isolation design minimizes crosstalk
  • 150fs RMS phase jitter
  • <0.7psRMS MUX crosstalk-induced jitter
  • Unique input termination and VTpin accepts DC- or AC-coupled inputs (CML, PECL, LVDS)
  • 800mV LVPECL output swing
  • Power supply +2.5V ±5% or +3.3V ±10%
  • -40°C to +85°C industrial temperature range
  • Available in 32-pin (5mm x 5mm) QFN package
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The SY89837U is a low jitter, low skew, high-speed 1:8 fanout buffer with a unique, 2:1 differential input multiplexer (MUX) optimized for clock redundant switchover applications. Unlike standard multiplexers, the SY89837U unique 2:1 runt pulse eliminator (RPE) input 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 static DC differential voltage (differential input voltage drops below 200mV). The SY89837U distributes clock frequencies from 1kHz to 1.5GHz, guaranteed, over temperature and voltage.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 200mV without any level shifting or termination resistor networks in the signal path. The outputs are 800mV, 100k compatible LVPECL with fast rise/fall times guaranteed to be less than 200ps.The SY89837U 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 SY89837U is part of Micrel's high-speed, Precision Edge® product line.

Additional Features
    • Selects between two clocks, and provides 8 precision, low skew LVPECL output copies
    • Guaranteed AC performance over temperature and supply voltage:
    • Wide operating frequency: 1kHz to >1.5GHz
      • <975ps in-to-out tpd
      • <180ps tr/tf
      • <40ps output-to-output skew
    • Unique input isolation design minimizes crosstalk
    • Ultra-low jitter design:
      • 150fs RMS phase jitter
      • <0.7psRMS MUX crosstalk-induced jitter
    • Unique input termination and VTpin accepts DC- or AC-coupled inputs (CML, PECL, LVDS)
    • 800mV LVPECL output swing
    • Power supply +2.5V ±5% or +3.3V ±10%
    • -40°C to +85°C industrial temperature range
    • Available in 32-pin (5mm x 5mm) QFN package
Parametrics
Name
Value
Product Type
Fanout & Buffer and Drivers
Description
2:8
Input
ANY
Output
LVPECL
Supply Voltage
2.5/3.3
Max Freq (GHz)
1.5
Max Prop Delay (ps)
975
Icc (mA)
115
Max Within Device Skew (ps)
40
OE
False
RPE
True
FSI
True
Input Mux
True
Input EQ
False
Output Type
LVPECL

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Dimension
Solder Composition
JEDEC Indicator
RoHS
China EFUP
SY89837UMG
0.064100
0.230833
32
VQFN
5x5x0.9mm
NiPdAu
e4
SY89837UMG-TR
0.064100
0.214000
32
VQFN
5x5x0.9mm
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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