ics9117-01 Holt Integrated Circuits, Inc., ics9117-01 Datasheet

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ics9117-01

Manufacturer Part Number
ics9117-01
Description
Frequency Generator Modem Systems
Manufacturer
Holt Integrated Circuits, Inc.
Datasheet
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
PD
X2
X1
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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ics9117-01 Summary of contents

Page 1

... 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 the frequency tolerance and -96dB signal-to-noise ratios required by 16-bit DSP modem systems ...

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 crystal. IN Crystal or clock input. PWR Power supply ground. IN Power-down signal. Power-down all loops and oscillators. ...

Page 3

... Except REFCLK only For all frequencies except * j1s REFCLK Forall frequencies except * jab REFCLK * REFCLK only j1s * REFCLK only jab With 14.318 MHzinput 33.8 MHz pu X1 (Pin 1) * inx X2 (Pin 8) 3 ICS9117- MIN TYP MAX UNITS - - 0.8 2 -10.0 -25 5.0 - 0.15 0.4 2.4 3.7 - 20.0 35 -20.0 -10.0 - 16.0 30 ...

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 ------------------------------ GND - 0 Power dissipation --------------------------------------------------------- 0.5 Watts Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied ...

Page 5

... Device Type (consists 4-digit numbers) Prefix ICS, AV=Standard Device PRODUCT PREVIEW documents contain information on products in the formative or design phase development. Charactersitic data and other specifications are design 5 goals. ICS reserves the right to change or discontinue these procucts without notice. ICS9117-01 0.154 0.015 0.025 ...

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