ICS276 datasheet(1/8 Pages) ICST

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ICS276

MDS 276 A

1

Revision 040805

Integrated Circuit Systems, Inc.

● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

Triple PLL Field Programmable VCXO Clock Synthesizer

PRELIMINARY INFORMATION

Description

The ICS276 field programmable VCXO clock

synthesizer generates up to three high-quality,

high-frequency clock outputs including multiple

reference clocks from a low-frequency crystal input. It

is designed to replace crystals and crystal oscillators in

most electronic systems.

Using ICS’ VersaClockTM software to configure PLLs

and outputs, the ICS276 contains a One-Time

Programmable (OTP) ROM for field programmability.

Programming features include VCXO and eight

selectable configuration registers.

Each of the outputs are powered by a single VDDO

voltage. VDDO may vary from 1.8 V to VDD.

Using Phase-Locked Loop (PLL) techniques, the

device runs from a standard fundamental mode,

inexpensive crystal, or clock. It can replace VCXOs,

multiple crystals and oscillators, saving board space

and cost.

The ICS276 is also available in factory programmed

custom versions for high-volume applications.

Features

• Packaged as 16-pin TSSOP

• Eight addressable registers

• Replaces multiple crystals and oscillators

• Output frequencies up to 200 MHz at 3.3 V

• Input crystal frequency of 5 to 27 MHz

• Up to three reference outputs

• Operating voltages of 3.3 V

• VDDO output control from 1.8 V to 3.3 V

• Controllable output drive levels

• Advanced, low-power CMOS process

• Available in Pb (lead) free packaging

Block Diagram

Voltage

Controlled

Crystal

Oscillator

GND

2

3

VDD

PDTS

PLL2

PLL3

Divide

Logic

and

Output

Enable

Control

S2:S0

CLK1

CLK3

CLK2

3

OTP

ROM

with

PLL

Values

X2

Crystal

External capacitors

are required.

X1

PLL1

VIN

VDDO

Số phần tương tự - ICS276

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