Integrated
Circuit
Systems, Inc.
General Description Features
XTAL
OSC PCLK
UCLK
MCLK
PLL
CLOCK
GEN
÷8
X2
14.7456
MHz X1
PD
•Generates the 14.7456 MHz microcontroller, 40.320
MHz datadump and 1.84320 UART cl ocks
•Less than ±80 ppm frequency variation including
temperatu re, 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
Applications
•Specifically designed to support the high performance
of fax/data modems
9117-01RevA052297P
Pentium is a trademark of Intel Corporation
PowerPC is a trademark of Motorola Corporation
Frequency Generator for Modem Systems
ICS9117-01
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-accur acy, 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). Achieving ±80ppm over four years
requires the cr ystal to have 20 ppm initial accurac y, ±20 ppm
temperature and ±5 ppm/year aging coeff icients.
Block Diagram
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.
2
ICS9117-01
Pin Configuration
Pin Descriptions
Functionality
X1, X2
(MHz) PD PCLK
(MHz) MCLK
(MHz) UCLK
(MHz)
14.7456 0 14.7456 40.320 1.8432
14.7456 1 Low Low Low
PI N NUMBE R PI N NAME TYPE DESCRIPTION
1 X2 OUT Drive to crystal.
2 X1 IN Crystal or clock input.
3 GND PWR Power supply ground.
4 PD IN Power-down signal. Power-down all loops and oscillators.
5 MCLK OUT Dat apump 40.32 MHz clock output.
6 VDD PWR +5V powers upply
7 UCLK OUT UART 1.84 MHz data clock output.
8 PCLK OUT Microcontroller 14.7 MHz clock output.
8-PIN SOIC
3
ICS9117-01
Absolute Maximum Ratings
Electrical Characteristics at 3.3V
Stresses a bove those listed under Absolute Maxim um Ratings may cause permanent damag e 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. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
AVDD, VDD referenced to GND ----------------------------------------- 7V
Operating temperature under bias------------------------------------- 0 º C to +70 ºC
Storage temperature------------------------------------------------------ -65 ºC to +150 ºC
Volta ge on I/O pins referenced to GND ------------------------------ GND - 0.5 V to VDD + 0.5 V
Power dissipation --------------------------------------------------------- 0.5 Watts
Operating VDD = +3.0 V to +3.7V; TA = 0 ºC to 70oC unless otherwise stated
* Parameter is guaranteed by design and characterization. Not 100% tested in production.
DC Ch arac t erist ics
P AR A M E T E R S YM B O L T EST C O N DITIO NS M IN TYP M A X U N I T S
Input Low Voltage VIL --0.8V
Input High Voltage VIH 2.0 - - V
Input Low Current IIL VIN=0V - -10.0 -25.0 µA
Input High Current IIH VIN=VDD - - 5.0 µA
Output Low Voltage VOL*I
OL=+10mA - 0.15 0.4 V
Output High Voltage VOH*I
OH=-10mA 2.4 3.7 - V
Output Low Current IOL* V=0.8V 20.0 35.0 - mA
Output High Current IOH* V=2.4V - -20.0 -10.0 mA
Supply Current ICC Unloaded - 16.0 30.0 mA
P ull- u p Re s istor V al ue R pu* - 400.0 800.0 k ohm
AC Ch arac t erist ics
Rise Time Tr* 15o/f kiadm 0.8 to 2.0V - 0.9 1.5 ns
Fall Time Tf* 15pF load, 2.0 to 0.8V - 1.2 3.0 ns
Lock Time TL* 15pFload, 20%to 80% 10.0 ms
Duty Cycle Dt*15pFload @50% of VDD;
ExceptREFCLK 45.0 50.0 55.0 %
Duty Cycle Dt*15pF load@50% of VDD;
Except REFCLK only 45.0 50.0 55.0 %
Jitter, One Sigmea Tj1s*For all frequencies except
REFCLK 70.0 100.0 ps
Jitter, Absolute Tjab*Forall frequenci es except
REFCLK -300.0 +300.0 ps
Jitter, One Sigma Tj1s* REFCLK only 250.0 300.0 ps
Jitter, Absolute Tjab* REFCLK only -500.0 +500.0 ps
Input FrequencyRange Fi* 4.0 28.0 MHz
Output Frequency Range Fo* 11.7 74.0 MHz
Out putMean Frequency
Accuracy vs.Target Foa* With 14.318 MHzinput -80.0 +80.0 ppm
Power-up Time Tpu* 0 to 33.8 MHz 2.5 4.5 ms
Crystal Input Capacitance Cinx*X1 (Pin 1)
X2 (Pin 8) 18.0 pF
4
ICS9117-01
Absolute Maximum Ratings
Electrical Characteristics at 5.0V
Stresses a bove those listed under Absolute Maximum Ra tings may cause permanent dama ge 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. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
Operating VDD = +4.5 V to +5.5V; T A = 0 ºC to 70oC unless otherwise stated
AVDD, VDD referenced to GND----------------------------------------- 7V
Operating temperature under bias------------------------------------- 0 º C to +70 ºC
Storage temperature------------------------------------------------------ -65 ºC to +150 ºC
Voltage on I/O pins referenced to GND ------------------------------ GND - 0.5 V to VDD + 0.5 V
Power dissipation --------------------------------------------------------- 0.5 Watts
DC Ch arac t erist ics
P AR A M E T E R S YM B O L T EST C O N DIT I O NS M I N T YP M A X U N I T S
Input Low Voltage VIL --0.8V
Input High Voltage VIH 2.0 - - V
Input Low Current IIL VIN=0V - -7.0 -25.0 µA
Input High Current IIH VIN=VDD - - 5.0 µA
Output Low Voltage VOL*I
OL=+10mA - 0.15 0.4 V
Output High Voltage VOH*I
OH=-10mA 4.0 4.2 - V
Output Low Current IOL* V=0.8V 20.0 40.0 - mA
Output High Current IOH* V=2.4V - -85.0 -65.0 mA
Supply Current ICC Unloaded - 22.0 -35.0 mA
P ull- u p Re s istor V al ue R pu* - 400.0 800.0 k ohm
AC Ch arac t erist ics
Rise Time Tr* 15o/f kiadm 0.8 to 2.0V - 0/8 1.5 ns
Fall Time Tf* 15pF load, 2.0 to 0.8V - 1.2 3.0 ns
Lock Time TL* 15pFload, 20%to 80% 10.0 ms
Duty Cycle Dt*15pFload @50% of VDD;
Except REFCLK 45.0 50.0 55.0 %
Duty Cycle Dt*15pF load@50% of VDD;
REFCLK only 45.0 50.0 55.0 %
Jitter, One Sigmea Tj1s*For all frequencies except
REFCLK 80.0 120.0 ps
Jitter, Absolute Tjab*Forall frequenci es except
REFCLK -310.0 +300.0 ps
Jitter, One Sigma Tj1s* REFCLK only 200.0 250.0 ps
Jitter, Absolute Tjab* REFCLK only -500.0 +500.0 ps
Input FrequencyRange Fi* 5.0 43.0 MHz
Output Frequency Range Fo* 14.0 114.0 MHz
Out putMean Frequency
Accuracy vs.Target Foa* With 14.318 MHzinput -80.0 +80.0 ppm
Power-up Time Tpu* 0 to 33.8 MHz 2.5 4.5 ms
Crystal Input Capacitance Cinx*X1 (Pin 1),
X2 (Pin 8) 18.0 pF
* Parameter is guaranteed by design and characterization. Not 100% tested in production.
5
ICS9117-01
Ordering Information
ICS9117M-01
0.194
0.031
0.024
0.016
0.050 0.006 
± 0.004 0.238
0.154
0.015
0.063
0.025
0.008
8-Pin SOIC
Example:
ICS XXXX M-PPP
Package Type
M =SOIC
Device Type (consists of 3 or 4-digit numbers)
Prefix
ICS, AV=Standard Device
Pattern Number (2 or 3-digit number for parts with ROM code pattern)
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.