343MIPLF View Datasheet(PDF) - Integrated Device Technology

Part Name

Description

Manufacturer

343MIPLF

FIELD PROGRAMMABLE TRIPLE OUTPUT SS VERSACLOCK SYNTHESIZER

Integrated Device Technology 

DATASHEET

FIELD PROGRAMMABLE TRIPLE OUTPUT SS VERSACLOCK SYNTHESIZER I CS3 4 3

Description

The ICS343 is a low cost, triple-output, field programmable

clock synthesizer. The ICS343 can generate three output

frequencies from 250 kHz to 200 MHz, using up to three

independently configurable PLLs. The outputs may employ

Spread Spectrum techniques to reduce system

electro-magnetic interference (EMI).

Using IDT’s VersaClock™ software to configure the PLL

and output, the ICS343 contains a One-Time

Programmable (OTP) ROM to allow field programmability.

Using Phase-Locked Loop (PLL) techniques, the device

runs from a standard fundamental mode, inexpensive

crystal, or clock. It can replace multiple crystals and

oscillators, saving board space and cost.

The device also has a power down feature that tri-states the

clock outputs and turns off the PLLs when the PDTS pin is

taken low.

The ICS343 is also available in factory-programmed

custom versions for high-volume applications.

Features

• 8-pin SOIC package (Pb-free)

• Highly accurate frequency generation

• M/N Multiplier PLL: M = 1...2048, N = 1...1024

• Output clock frequencies up to 200 MHz

• Spread spectrum capability for lower system EMI

• Center or Down Spread up to 4% total

• Selectable 32 kHz or 120 kHz modulation

• Input crystal frequency from 5 to 27 MHz

• Input clock frequency from 2 to 50 MHz

• Operating voltage of 3.3 V, using advanced, low power

CMOS process

• For one output clock, use the ICS341. For two output

clocks, see the ICS342. For more than three outputs, see

the ICS345 or ICS348.

Block Diagram

VDD

Crystal or

clock input

X1/ICLK

X2

OTP ROM

with PLL

Divider

Values

Crystal

Oscillator

External capacitors are

required with a crystal input.

PLL Clock Synthesis,

Spred Spectrum and

Control Circuitry

CLK1

CLK2

CLK3

GND

PDTS (both outputs and PLL)

IDT®/ ICS™ FIELD PROGRAMMABLE TRIPLE OUTPUT SS VERSACLOCK SYNTHESIZER 1

ICS343

REV M 090613

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