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 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
Applications
Specifically designed to support the high performance
of fax/data modems
9117-01 RevA 052297P
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-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). Achieving 80ppm over four years
requires the crystal to have 20 ppm initial accuracy, 20 ppm
temperature and 5 ppm/year aging coefficients.
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
PIN NUMBER
PIN 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
Datapump 40.32 MHz clock output.
6
VDD
PWR
+5V powersupply
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 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. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
AV
DD
, V
DD
referenced to GND ----------------------------------------- 7V
Operating temperature under bias ------------------------------------- 0 C to +70 C
Storage temperature ------------------------------------------------------ -65 C to +150 C
Voltage on I/O pins referenced to GND ------------------------------ GND - 0.5 V to V
DD
+ 0.5 V
Power dissipation --------------------------------------------------------- 0.5 Watts
Operating V
DD
= +3.0 V to +3.7V; T
A
= 0 C to 70
o
C unless otherwise stated
* Parameter is guaranteed by design and characterization. Not 100% tested in production.
DC Characteristics
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Low Voltage
V
IL
-
-
0.8
V
Input High Voltage
V
IH
2.0
-
-
V
Input Low Current
I
IL
V
IN
=0V
-
-10.0
-25.0
A
Input High Current
I
IH
V
IN
=V
DD
-
-
5.0
A
Output Low Voltage
V
OL
*
I
OL
=+10mA
-
0.15
0.4
V
Output High Voltage
V
OH
*
I
OH
=-10mA
2.4
3.7
-
V
Output Low Current
I
OL
*
V=0.8V
20.0
35.0
-
mA
Output High Current
I
OH
*
V=2.4V
-
-20.0
-10.0
mA
Supply Current
I
CC
Unloaded
-
16.0
30.0
mA
Pull-up Resistor Value
R
pu
*
-
400.0
800.0
k ohm
AC Characteristics
Rise Time
T
r
*
15o/f kiadm 0.8 to 2.0V
-
0.9
1.5
ns
Fall Time
T
f
*
15pF load, 2.0 to 0.8V
-
1.2
3.0
ns
Lock Time
T
L
*
15pFload, 20%to 80%
10.0
ms
Duty Cycle
D
t
*
15pFload @50% of VDD;
ExceptREFCLK
45.0
50.0
55.0
%
Duty Cycle
D
t
*
15pF load@50% of VDD;
Except REFCLK only
45.0
50.0
55.0
%
Jitter, One Sigmea
T
j1s
*
For all frequencies except
REFCLK
70.0
100.0
ps
Jitter, Absolute
T
jab
*
Forall frequencies except
REFCLK
-300.0
+300.0
ps
Jitter, One Sigma
T
j1s
*
REFCLK only
250.0
300.0
ps
Jitter, Absolute
T
jab
*
REFCLK only
-500.0
+500.0
ps
Input FrequencyRange
F
i
*
4.0
28.0
MHz
Output Frequency Range
F
o
*
11.7
74.0
MHz
OutputMean Frequency
Accuracy vs.Target
F
oa
*
With 14.318 MHzinput
-80.0
+80.0
ppm
Power-up Time
T
pu
*
0 to 33.8 MHz
2.5
4.5
ms
Crystal Input Capacitance
C
inx
*
X1 (Pin 1)
X2 (Pin 8)
18.0
pF
4
ICS9117-01
Absolute Maximum Ratings
Electrical Characteristics at 5.0V
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. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
Operating V
DD
= +4.5 V to +5.5V; T
A
= 0 C to 70
o
C unless otherwise stated
AV
DD
, V
DD
referenced to GND ----------------------------------------- 7V
Operating temperature under bias ------------------------------------- 0 C to +70 C
Storage temperature ------------------------------------------------------ -65 C to +150 C
Voltage on I/O pins referenced to GND ------------------------------ GND - 0.5 V to V
DD
+ 0.5 V
Power dissipation --------------------------------------------------------- 0.5 Watts
DC Characteristics
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Low Voltage
V
IL
-
-
0.8
V
Input High Voltage
V
IH
2.0
-
-
V
Input Low Current
I
IL
V
IN
=0V
-
-7.0
-25.0
A
Input High Current
I
IH
V
IN
=V
DD
-
-
5.0
A
Output Low Voltage
V
OL
*
I
OL
=+10mA
-
0.15
0.4
V
Output High Voltage
V
OH
*
I
OH
=-10mA
4.0
4.2
-
V
Output Low Current
I
OL
*
V=0.8V
20.0
40.0
-
mA
Output High Current
I
OH
*
V=2.4V
-
-85.0
-65.0
mA
Supply Current
I
CC
Unloaded
-
22.0
-35.0
mA
Pull-up Resistor Value
R
pu
*
-
400.0
800.0
k ohm
AC Characteristics
Rise Time
T
r
*
15o/f kiadm 0.8 to 2.0V
-
0/8
1.5
ns
Fall Time
T
f
*
15pF load, 2.0 to 0.8V
-
1.2
3.0
ns
Lock Time
T
L
*
15pFload, 20%to 80%
10.0
ms
Duty Cycle
D
t
*
15pFload @50% of VDD;
Except REFCLK
45.0
50.0
55.0
%
Duty Cycle
D
t
*
15pF load@50% of VDD;
REFCLK only
45.0
50.0
55.0
%
Jitter, One Sigmea
T
j1s
*
For all frequencies except
REFCLK
80.0
120.0
ps
Jitter, Absolute
T
jab
*
Forall frequencies except
REFCLK
-310.0
+300.0
ps
Jitter, One Sigma
T
j1s
*
REFCLK only
200.0
250.0
ps
Jitter, Absolute
T
jab
*
REFCLK only
-500.0
+500.0
ps
Input FrequencyRange
F
i
*
5.0
43.0
MHz
Output Frequency Range
F
o
*
14.0
114.0
MHz
OutputMean Frequency
Accuracy vs.Target
F
oa
*
With 14.318 MHzinput
-80.0
+80.0
ppm
Power-up Time
T
pu
*
0 to 33.8 MHz
2.5
4.5
ms
Crystal Input Capacitance
C
inx
*
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.
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