LMK61E0M Ultra-Low Jitter Programmable Oscillator With Internal EEPROM | TI.com

LMK61E0M (ACTIVE) Ultra-Low Jitter Programmable Oscillator With Internal EEPROM

 

Description

The LMK61E0 family of ultra-low jitter PLLatinumTM programmable oscillators use fractional-N frequency synthesizers with integrated VCOs to generate commonly used reference clocks. The LMK61E0M supports 3.3-V LVCMOS outputs. The device features self start-up from on-chip EEPROM to generate a factory programmed default output frequency, or the device registers and EEPROM settings are fully programmable in-system through I2C serial interface. The device provides fine and coarse frequency margining control through I2C serial interface, making it a digitally-controlled oscillator (DCXO).

The PLL feedback divider can be updated to adjust the output frequency without spikes or glitches in steps of <1ppb using a PFD of 12.5 MHz (R divider=4, doubler disabled) for compatibility with xDSL requirements, or in steps of <5.2 ppb using a PFD of 100 MHz (R divider=1, doubler enabled) for compatibility with broadcast video requirements. The frequency margining features also facilitate system design verification tests (DVT), such as standards compliance and system timing margin testing.

Features

  • Ultra-Low Noise, High Performance
    • Jitter: 500-fs RMS Typical fOUT > 50 MHz on LMK61E0M
  • LMK61E0M Supports 3.3-V LVCMOS Output up to 200 MHz
  • Total Frequency Tolerance of ±25 ppm
  • System Level Features
    • Glitch-Less Frequency Margining: Up to ±1000 ppm From Nominal
    • Internal EEPROM: User Configurable Start-Up Settings
  • Other Features
    • Device Control: Fast Mode I2C up to 1000 kHz
    • 3.3-V Operating Voltage
    • Industrial Temperature Range (–40ºC to +85ºC)
    • 7-mm × 5-mm 8-Pin Package
  • Default Frequency: 70.656 MHz

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Parametrics

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Part number Order Features Output frequency (Max) (MHz) Output level Jitter (ps) Stability (ppm) VCC core (V) Operating temperature range (C)
LMK61E0M Order now Standard
7x5mm    
200     LVCMOS     0.5     25     3.3     -40 to 85    
LMK60E0-156M Order now Standard
7x5mm    
156.25     LVPECL     0.15     25     3.3     -40 to 85    
LMK60E2-150M Order now Standard
7x5mm    
150     LVPECL     0.15     50     3.3     -40 to 85    
LMK60E2-156M Order now Standard
7x5mm    
156.25     LVPECL     0.15     50     3.3     -40 to 85    
LMK61A2-100M Order now Standard
7x5mm    
100     LVDS     0.1     50     3.3     -40 to 85    
LMK61A2-156M Order now Standard
7x5mm    
156.25     LVDS     0.1     50     3.3     -40 to 85    
LMK61A2-644M Order now Standard
7x5mm    
644.53125     LVDS     0.15     50     3.3     -40 to 85    
LMK61E0-155M Order now Standard
7x5mm    
155.52     LVPECL     0.15     25     3.3     -40 to 85    
LMK61E0-156M Order now Standard
7x5mm    
156.25     LVPECL     0.1     25     3.3     -40 to 85    
LMK61E07 Order now Programmable with EEPROM
7x5mm    
1000     HCSL
LVDS
LVPECL    
0.150     25     3.3     -40 to 85    
LMK61E2 Order now Programmable with EEPROM
7x5mm    
1000     HCSL
LVDS
LVPECL    
0.1     50     3.3     -40 to 85    
LMK61E2-100M Order now Standard
7x5mm    
100     LVPECL     0.1     50     3.3     -40 to 85    
LMK61E2-156M Order now Standard
7x5mm