MB88R157A FUJITSU [Fujitsu Component Limited.], MB88R157A Datasheet

MB88R157A

Manufacturer Part Number

MB88R157A

Description

Spread Spectrum Clock Generator Capable of Freely Setting the Output Clock Frequency

Manufacturer

FUJITSU [Fujitsu Component Limited.]

Datasheet

1.MB88R157A.pdf (4 pages)

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Capable of Freely Setting the Output

Clock Frequency

MB88R157A

We have added MB88R157A with built-in FRAM to our lineup of spread spectrum

clock generator (SSCG) products that are effective measures against EMI noise.

The output frequency can be set at the user

for the input frequency of 10MHz to 50MHz.

Introduction

In recent years, electronic devices have adopted higher

performance (speed) and smaller sizes (higher density) and, as

a result, their noise emission has been growing steadily. Noise

problems are often the final challenge to overcome prior to the

mass production of a product following the trial and error of

product design and evaluation. As electrical signals (the clock

frequency that operates a system) and noise are intrinsically

the same, it is important to take noise countermeasures into

consideration at the board system design stage of a product.

This product not only simplifies noise countermeasures but

also dramatically saves on the time spent developing noise

countermeasures later, thereby minimizing the cost and evaluation

time.

What is SSCG?

SSCG is a product that reduces the emission of unnecessary noise

by slightly fluctuating (modulating) the clock frequency that is the

source of noise in a range that does not affect the system operation.

SSCG: Spread Spectrum Clock Generator

FRAM: Ferroelectric Random Access Memory (nonvolatile memory utilizing ferroelectric)

pread Spectrum Clock Generator

New Products

MB88R157A

s discretion between 1MHz and 134MHz

Our SSCG controls the clock frequency in an ideal fashion

by applying our proprietary digitally controlled (current D/A

converter) “frequency modulation technology” and “composite

modulation technology.” It achieves

FUJITSU, 1.5

Photo 1 External View

％

modulation degree used), which corresponds

2010

−

No.3

19dB (measurement value by

FIND Vol.28

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