MK3722集成电路（IC）的时钟发生器PLL频率合成器规格书PDF中文资料

描述 Description

The MK3722 is a low cost, low jitter, high performance

VCXO and PLL clock synthesizer designed to replace

expensive discrete VCXOs and multipliers. 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. Using IDT’s analog/digital Phase-Locked Loop

(PLL) techniques, the device uses an inexpensive 27 MHz

pullable crystal input to produce a reference output and a

selectable audio clock.

IDT manufactures the largest variety of VCXO based timing

devices for all applications. Consult IDT to eliminate

VCXOs, crystals, and oscillators from your board.

The frequency of the on-chip VCXO is adjusted by an

external control voltage connected to VIN. Because VIN is

a high impedance input, it can be driven directly from an

PWM RC integrator circuit.

特性 Features

• Packaged in 16-pin TSSOP

• Pb (lead) free package

• Replaces a VCXO and oscillator

• Operating voltage of 3.3V

• Provides output of 27 MHz plus audio clock

• Uses an inexpensive 27 MHz pullable crystal

• On-chip patented VCXO with pull range of 230 ppm

(minimum)

• VCXO tuning voltage of 0 to 3.3 V

• Advanced, low power, sub-micron CMOS process