ICS726

MDS 726 F

1

Revision 112905

Description

Used in conjunction with an external pullable quartz

crystal, this monolithic integrated circuit replaces more

costly hybrid (canned) VCXO devices. The ICS726 is

designed primarily for data and clock recovery

applications such as ADSL modems, set-top box

receivers, and telecom systems.

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

external control voltage to the VIN pin. Since VIN is a

high impedance input, it can be driven directly from an

PWM RC integrator circuit. Frequency output increases

with VIN voltage input. The usable range of VIN is 0 to

3.3 V.

Features

ppm minimum

Block Diagram

Voltage

Controlled

Crystal

Oscillator

12-36MHz

Pullable

Crystal

X1

X2

VIN

12-36MHz

VDD

GND