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LMK61A2-644M
  • LMK61A2-644M

LMK61A2-644M

ACTIVE

LVDS ultra-low jitter programmable oscillator with internal EEPROM

Texas Instruments LMK61A2-644M Product Info

1 April 2026 5

Parameters

Output type

LVDS

Output frequency (MHz)

644.53125

Stability (ppm)

50

Supply voltage (V)

3.3

Operating temperature range (°C)

-40 to 85

Jitter (ps)

0.15

Package

QFM (SIA)-6-35 mm² 7 x 5

Features

  • Ultra-low Noise, High Performance
    • Jitter: 90 fs RMS Typical Fout > 100 MHz
    • PSRR: –70 dBc, Robust Supply Noise Immunity
  • Supported Output Format
    • LVPECL up to 1 GHz
    • LVDS up to 900 MHz
    • HCSL up to 400 MHz
  • Total Frequency Tolerance of ± 50 ppm (LMK61X2) and ± 25 ppm (LMK61X0)
  • 3.3-V Operating Voltage
  • Industrial Temperature Range (–40ºC to +85ºC)
  • 7 mm × 5 mm 6-Pin Package, Pin-Compatible With Industry Standard 7050 XO Package
  • Ultra-low Noise, High Performance
    • Jitter: 90 fs RMS Typical Fout > 100 MHz
    • PSRR: –70 dBc, Robust Supply Noise Immunity
  • Supported Output Format
    • LVPECL up to 1 GHz
    • LVDS up to 900 MHz
    • HCSL up to 400 MHz
  • Total Frequency Tolerance of ± 50 ppm (LMK61X2) and ± 25 ppm (LMK61X0)
  • 3.3-V Operating Voltage
  • Industrial Temperature Range (–40ºC to +85ºC)
  • 7 mm × 5 mm 6-Pin Package, Pin-Compatible With Industry Standard 7050 XO Package

Description

The LMK61XX is an ultra-low jitter oscillator that generates a commonly used reference clock. The device is pre-programmed in factory to support any reference clock frequency; supported output formats are LVPECL up to 1 GHz, LVDS up to 900 MHz, and HCSL up to 400 MHz. Internal power conditioning provide excellent power supply ripple rejection (PSRR), reducing the cost and complexity of the power delivery network. The device operates from a single 3.3 V ± 5% supply.

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