Overview

The MK3727H is a low drive, low cost, single output 3.3 Volt VCXO and PLL clock synthesizers designed to replace expensive VCXOs and crystals. The patented on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3.3 V input voltage to cause the output clocks to vary by ±115 ppm minimum. Using our analog Phase Locked Loop (PLL) techniques, the devices uses an external, fundamental mode 13.5 MHz pullable crystal input to produce output clocks of 27 MHz. The drive parameters are optimized for low EMI. The frequency of the on-chip VCXO is adjusted by an external control voltage input into pin VIN. Because VIN is high-impedance input, it can be driven directly from an PWM RC integrator circuit.

MK3727H - Block Diagram
MK3727H - Pinout
MK3727H - Block Diagram
MK3727H - Pinout
  • Packaged in 8-pin SOIC
  • Operating voltage of 3.3 V (±5%)
  • Single pullable output clock of 24 to 36 MHz
  • Uses a fundamental mode 12 to 18 MHz pullable crystal
  • On-chip patented VCXO with pull range of 230 ppm (minimum)
  • VCXO tuning voltage of 0 to 3.3 V
  • Low-drive output stage to reduce EMI
  • Advanced, low-power, sub-micron CMOS process
  • RoHS 5 (green) or RoHS 6 (green and lead free) compliant package

Documentation

= Featured Documentation
Type Title Date
Datasheet
MK3727H Datasheet
PDF 233 KB
Application Note
AN-841 Pullable Crystal Selection and VCXO Tuning
PDF 334 KB
Application Note
AN-848 VCXO - Crystal Selection
PDF 222 KB
Application Note
AN-849 Loop Filter Component Selection for VCXO Based PLLs
PDF 218 KB
Application Note
AN-847 VCXO - Absolute Pull Range
PDF 155 KB
5 items

Design & Development

ECAD Models

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Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    MK3727HLF
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 C Yes Tube
    MK3727HLFTR
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 C Yes Reel
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