MK3754

Low Cost 54 MHz 3.3 Volt VCXO

MDS 3754 D

1

Revision 060100

Printed 11/16/00

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800 tel • www.icst.com

I C R O

Block Diagram

Description

Features

The MK3754 is ICS/Microclock’s lowest cost, low

jitter, high performance 3.3 Volt VCXO and PLL

clock synthesizer designed to replace expensive

54 MHz VCXOs. The on-chip Voltage Controlled

Crystal Oscillator accepts a 0 to 3.3 V input voltage

to vary the output clocks by ±100 ppm. Using

ICS/Microclock’s patented VCXO and

analog/digital Phase-Locked Loop (PLL)

techniques, the device uses an inexpensive external

13.5 MHz pullable crystal input to produce a

54 MHz output clock.

The MK3754A is a drop-in replacement to the

earlier MK3754S.

• Packaged in 8 pin SOIC

• 3.3 V only operating voltage

• Uses an inexpensive 13.500 MHz external crystal

• On-chip VCXO (patented) with pull range of

200ppm (minimum)

• VCXO tuning voltage of 0 to 3.3 V

• 12mA output drive capability at TTL levels

• Advanced, low power, sub-micron CMOS process

• The A version is the latest, manufactured in a

smaller geometry process. The MK3754A gives a

wider pull range than the MK3754S, and so is

recommended for all new designs, and cost

reductions of existing designs.

Voltage

Controlled

Crystal

Oscillator

PLL/Clock

Synthesis

Circuitry

13.5 MHz

pullable

crystal

X1

X2

VIN

Output

Buffer

54MHz