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SY89840U

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 ...

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SeekIC No. : 004510381 Detail

SY89840U: 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 t...

SY89840U Data Sheet

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Part Number:
SY89840U
Supply Ability:
5000

Price Break

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/23

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Product Details

Description



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:
<1psrms random jitter
<1psrms cycle-to-cycle jitter
<10pspp total jitter (clock)
<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) MLF™ package




Application

• Redundant clock switchover
• Failsafe clock protection




Pinout

Connection Diagram




Specifications

Supply Voltage (VCC) .......................................0.5V to +4.0V
Input Voltage (VIN) ..............................................0.5V to VCC
LVPECL Output Current (IOUT)
Continuous ............................................................. ±50mA
Surge ................................................................... .±100mA
Termination Current
Source/Sink Current on VT......................................±100mA
Source/Sink Current on IN, /IN..................................±50mA
VREF-AC Current
Source/sink current on VREF-AC ..................................±2mA
Lead Temperature (soldering, 20 sec.).........................+260°C




Description

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. All support documentation can be found on Micrel's web site at: www.micrel.com.






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