ICS9117M-01 ICST [Integrated Circuit Systems], ICS9117M-01 Datasheet

ICS9117M-01

Manufacturer Part Number

ICS9117M-01

Description

Frequency Generator for Modem Systems

Manufacturer

ICST [Integrated Circuit Systems]

Datasheet

1.ICS9117M-01.pdf (5 pages)

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General Description

The ICS9117-01 is a low-cost, high-performance frequency

generator designed to support fax/data modem systems.

Datapump and UART clocks are synthesized from a

microcontroller crystal using high-accuracy, low-jitter PLLs,

meeting the frequency tolerance and -96dB signal-to-noise

ratios required by 16-bit DSP modem systems. Fast output

clock edge rates minimize board induced jitter.

Exact frequency multiplying ratios ensure better than ±80

ppm frequency accuracy using a standard AT crystal with

external load capacitors (typically 33pF ±5% for an 18pF

series load crystal).

requires the crystal to have 20 ppm initial accuracy, ±20 ppm

temperature and ±5 ppm/year aging coefficients.

Block Diagram

Frequency Generator for Modem Systems

9117-01 RevA 052297P

14.7456

MHz

Integrated

Circuit

Systems, Inc.

Achieving ±80ppm over four years

CLOCK

XTAL

OSC

GEN

PLL

PRODUCT PREVIEW documents contain information on products in the formative or

design phase development. Charactersitic data and other specifications are design

goals. ICS reserves the right to change or discontinue these procucts without notice.

•

Applications

•

Features

Generates the 14.7456 MHz microcontroller, 40.320

MHz datadump and 1.84320 UART clocks

Less than ±80 ppm frequency variation including

temperature, voltage, load and aging tolerances

Single crystal reference minimizes crystal reliability

and inventory issues

80 ps one sigma jitter maintains 16-bit performance

Output rise/fall times less than 1.5 ns

On-chip loop filter components

3.0 V - 5.5 V supply range

8-pin, 150-mil SOIC package

Specifically designed to support the high performance

of fax/data modems

÷8

Pentium is a trademark of Intel Corporation

PowerPC is a trademark of Motorola Corporation

ICS9117-01

PCLK

UCLK

MCLK

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ICS9117M-01 Summary of contents

Page 1

Integrated Circuit Systems, Inc. Frequency Generator for Modem Systems General Description The ICS9117- low-cost, high-performance frequency generator designed to support fax/data modem systems. Datapump and UART clocks are synthesized from a microcontroller crystal using high-accuracy, low-jitter PLLs, meeting ...

Page 2

ICS9117-01 Pin Configuration 8-PIN SOIC Pin Descriptions PIN NUMBER PIN NAME GND MCLK 6 VDD 7 UCLK 8 PCLK Functionality X1 (MHz) 14.7456 0 14.7456 1 TYPE OUT Drive to ...

Page 3

Absolute Maximum Ratings referenced to GND ----------------------------------------- Operating temperature under bias ------------------------------------- 0 ºC to +70 ºC Storage temperature ------------------------------------------------------ -65 ºC to +150 ºC Voltage on I/O pins referenced to GND ------------------------------ GND ...

Page 4

ICS9117-01 Absolute Maximum Ratings referenced to GND ----------------------------------------- Operating temperature under bias ------------------------------------- 0 ºC to +70 ºC Storage temperature ------------------------------------------------------ -65 ºC to +150 ºC Voltage on I/O pins referenced to GND ------------------------------ ...

Page 5

... Ordering Information ICS9117M-01 Example: ICS XXXX M-PPP 0.063 0.008 0.238 0.050 0.006 ± 0.004 8-Pin SOIC Pattern Number (2 or 3-digit number for parts with ROM code pattern) Package Type M =SOIC Device Type (consists 4-digit numbers) Prefix ...

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