DATASHEET

SPREAD SPECTRUM CLOCK GENERATOR

ICS7152A

IDT™ / ICS™ SPREAD SPECTRUM CLOCK GENERATOR

1

ICS7152A

REV E 051310

Description

The ICS7152A-02 and -11 are clock generators for EMI

(Electromagnetic Interference) reduction (see below for

frequency ranges and multiplier ratios). Spectral peaks are

attenuated by modulating the system clock frequency.

Down or center spread profiles are selectable. Down

spread will not exceed the maximum frequency of an

unspread clock, and center spread does not change the

average operating frequency of the system

IDT offers many other clocks for computers and computer

peripherals. Consult IDT when you need to remove crystals

and oscillators from your board.

Features

• Operating voltage of 3.3 V ±0.3 V

• Packaged in 8-pin SOIC

• Input frequency range of 16.6 to 134.0 MHz

• Output frequency range of 16.6 to 134.0 MHz

• Provides a spread spectrum clock output (±0.5%, ±1.5%

center spread; -1.0%, -3.0% down spread)

• Low cycle-to-cycle jitter - less than 100 ps

• Advanced, low-power CMOS process

• Industrial and commercial temperature ranges

• Pb (lead) free package, RoHS compliant

• Pin compatible with Fujitsu MB88152-102 and -111

Block Diagram

Product Lineup

Product

Input Frequency Range

Modulation Type

Modulation Enable Pin

ICS7152AM-02, ICS7152AMI-02

40.0 MHz to 134.0 MHz

Down spread

Yes

ICS7152AM-11, ICS7152AMI-11

16.6 MHz to 67.0 MHz

Center spread

PLL Clock

Synthesis

and Spread

Spectrum

Circuitry

SEL

FREQ

CKOUT

GND

VDD

Clock Buffer/

Crystal

Ocsillator

XIN

XOUT

External caps required with crystal for

accurate tuning of the clock

XENS