LMK61E07 Ultra-Low Jitter Programmable Oscillator with Internal EEPROM | TI.com

LMK61E07 (ACTIVE)

Ultra-Low Jitter Programmable Oscillator with Internal EEPROM

 

Description

The LMK61E07 family of ultra-low jitter PLLatinumTM programmable oscillators use fractional-N frequency synthesizers with integrated VCOs to generate commonly used reference clocks. The output on LMK61E07 can be configured as LVPECL, LVDS, or HCSL. 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: 90-fs RMS Typical fOUT > 100 MHz on LMK61E07
    • PSRR: –70 dBc, Robust Supply Noise Immunity on LMK61E07
  • Flexible Output Format on LMK61E07
    • LVPECL up to 1 GHz
    • LVDS up to 900 MHz
    • HCSL up to 400 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 Compare all products in Clock oscillators

 
Features
Output Frequency (Max) (MHz)
Output Level
Jitter (ps)
Stability (ppm)
VCC Core (V)
Operating Temperature Range (C)
Pin/Package
LMK61E07 LMK60E2-156M LMK61A2-100M LMK61E0M LMK61E2 LMK62E2-156M
Programmable with EEPROM
7x5mm    
Standard
7x5mm    
Standard
7x5mm    
Standard
7x5mm    
Programmable with EEPROM
7x5mm    
Standard
5x3.2mm    
1000     156.25     100     200     1000     156.25    
HCSL
LVDS
LVPECL    
LVPECL     LVDS     LVCMOS     HCSL
LVDS
LVPECL    
LVPECL    
0.150     0.15     0.1     0.5     0.1     0.15    
25     50     50     25     50     50    
3.3     3.3     3.3     3.3     3.3     3.3    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
6QFM     6QFM     6QFM     8QFM     8QFM     6QFM