ICST AV9154A-60 Opti notebook frequency generator Datasheet

AV9154A-60
Integrated
Circuit
Systems, Inc.
OPTi Notebook Frequency Generator
General Description
Features
The AV9154A-60 is a low cost frequency generator designed
for general purpose PC and disk drive applications. Its CPU
clocks provide all necessary frequencies for 286, 386 and
486 systems, including support for the latest speeds of
processors. The standard devices use a 14.318 MHz crystal to
generate the CPU and peripheral clocks for integrated desktop
and notebook motherboards.
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•
•
•
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The AV9154A-60 is specifically designed for use with OPTi
core logic chip sets.
The AV9154A-60 can operate at 5.0V±10% or 3.3V±10%,
but the CPU frequencies are limited (see the asterisks on the
selection tables on page three) during 3.3V operation. The
parts have two power-down pins. One shuts off the CPU clock
to a low state when the power-down pin is taken high, and the
other turns off the 14.318 MHz output in the same manner.
Compatible with 286, 386, and 486 CPUs
Up to 66.6 MHz (-60) CPU clocks
All loop filter components internal
3.3V and 5V operation
16-pin 150-mil SOIC
Power-down control of CPU clock
Applications
Computer Motherboards: The AV9154A-60 replaces crystals
and oscillators, saving board space, component cost, part
count and inventory costs. It produces switchable CPU clock
and up to four fixed clocks to drive floppy disk,
communications, super I/O, bus and/or keyboard devices. The
small package and 3.3V operation is perfect for handheld
computers.
Block Diagram
9154-60 Rev B 05/30/97
ICS reserves the right to make changes in the device data identified in this
publication without further notice. ICS advises its customers to obtain the latest
version of all device data to verify that any information being relied upon by the
customer is current and accurate.
AV9154A-60
Functionality
Pin Configuration
(in MHz, assuming 14.318 MHz input)
16-Pin SOIC
FS2
FS1
FS0
CPUCLK
0
0
0
8
0
0
1
16
0
1
0
20
0
1
1
25
1
0
0
33.33
1
0
1
40
1
1
0
50
1
1
1
66.66
Actual Output Frequencies
(in MHz, assuming 14.318 MHz input)
FS2
FS1
FS0
CPUCLK
0
0
0
8.182
0
0
1
16.11
0
1
0
20.05
0
1
1
25.06
1
0
0
33.24
1
0
1
40.09
1
1
0
50.11
1
1
1
66.48
Pin Descriptions
PIN NUMBER
PIN NAME
TYPE
DESCRIPTION
1
FS0
I
Frequency Select 0 for CPUCLK.
2
X2
O
Crystal out. Connect a 14.318 MHz crystal to this pin.
3
X1
I
Crystal in. Connect a 14.318 MHz crystal to this pin.
4
VDD
P
Digital Power (+3.3V or +5V).
5
GND
P
Digital Ground.
6
24 Mhz
O
24 MHz clock output.*
7
128 kHz
O
128 kHz clock output.*
8
AGND
P
Analog Ground.
Power-down 14.318 MHz output (active high).
9
PD14
I
10
PDCPUCLK
I
Power-down CPU clock (active high).
11
14.318 Mhz
O
14.318 MHz reference clock output.*
12
GND
P
Digital Ground.
13
VDD
P
Digital Power (+3.3V or +5V).
14
CPUCLK
O
CPU Clock output determined by status of FS0 - FS2.
15
FS2
I
Frequency Select 2 for CPUCLK.
16
FS1
I
Frequency Select 1 for CPUCLK.
Note:
No internal pull-ups on any Inputs.
* Frequencies shown are assuming a 14.318 MHz input.
2
AV9154A-60
Absolute Maximum Ratings
VDD referenced to GND . . . . . . . . . . . . . . . . . . . . . . 7V
Operating temperature under bias. . . . . . . . . . . . . . . . 0°C to +70°C
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +150°C
Voltage on I/O pins referenced to GND. . . . . . . . . . . GND -0.5V to VDD +0.5V
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. Exposure to absolute maximum rating conditions for extended periods may affect product
reliability.
Electrical Characteristics at 5V
VDD =+5V±10%, TA=0°C to 70°C unless otherwise stated
DC Characteristics
MIN
TYP
MAX
UNITS
Input Low Voltage
PARAMETER
VIL
VDD=5V
-
-
0.8
V
Input High Voltage
VIH
VDD=5V
2.0
-
-
V
Input Low Current
IIL
VIN=0V
-
-
-5
µA
Input High Current
IIH
VIN=VDD
-
-
5
µA
V
Output Low Voltage 1
SYMBOL
TEST CONDITIONS
VOL
IOL=10mA
-
0.15
0.4
Output High Voltage
1
VOH
IOH=-30mA
2.4
3.7
-
V
Output Low Current
1
IOL
VOL=0.8V
15
32
-
mA
Output High Current
1
IOH
VOH=2.4V
-
-48
-30
mA
Supply Current
IDD
No load 2
-
25
50
mA
Output Frequency Change over
Supply and Temperature 1
FD
With respect to typical
frequency
-
0.002
0.01
%
25
40
-
mA
Short circuit current
1
ISC
Each output clock
Input Capacitance
1
Ci
Except X1, X2
-
-
10
pF
Load Capacitance
1
CL
Pins X1, X2
-
20
-
pF
When powered-down
-
20
-
mA
Supply Current, lowest
IDDSTBY
Note:
1. Parameter is guaranteed by design and characterization. Not 100% tested in production.
2. All clocks on AV9154A-60 running at highest possible frequencies.
3
AV9154A-60
Electrical Characteristics at 5V
VDD =+5V±10%, TA=0°C to 70°C unless otherwise stated
AC Characteristics
PARAMETER
Input Clock Rise time
SYMBOL
1
Input Clock Fall time 1
Output Rise time
1
TEST CONDITIONS
MIN
TYP
MAX
UNITS
tICr
20
ns
tICf
20
ns
tr
15pF load, 0.8 to 2.0V
-
1
2
ns
Rise time1
tr
15pF load, 20% to 80% V DD
-
2
4
ns
Output Fall time1
tf
15pF load, 2.0 to 0.8V
-
1
2
ns
Fall time
1
Duty cycle1
Duty cycle, reference clock
1
tf
15pF load, 80% to 20% V DD
-
2
4
ns
dt
15pF load
40/60
48/52
60/40
%
40/60
43/57
60/40
%
±0.8
±2.5
%
±2
±5
%
dt
15pF load
Jitter, one sigma1
Tjls
Jitter, absolute1
Tjab
As compared with clock
period
1
Tjab
16-80 MHz clocks
Jitter, absolute
Input Frequency 1
fi
700
14.318
Frequency Transition time 1
tft
From 16 to 80 MHz
15
Power-up time1
tpu
From off to 50 MHz
15
Note:
1. Parameter is guaranteed by design and characterization. Not 100% tested in production.
4
ps
MHz
20
ms
ms
AV9154A-60
Electrical Characteristics at 3.3V
Operating VDD =+3.0V to +3.7V, TA=0°C to 70°C unless otherwise stated
DC Characteristics
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Low Voltage
VIL
-
-
0.2VDD
Input High Voltage
VIH
0.7VDD
-
-
V
Input Low Current
IIL
VIN=0V
-5
-
5
µA
IIH
VIN=VDD
-5
-
5
µA
Output Low Voltage 1
Input High Current
VOL
IOL=6mA
-
0.05VDD
0.1VDD
V
1
VOH
IOH=-4mA
0.85VDD
0.94VDD
-
V
IDD
Note 2, no load
-
15
27
mA
Output Low Current1
IOL
VOL=0.2VDD
12
22
-
mA
1
IOH
VOH=0.7VDD
-
-11
-6.5
mA
Fd
With respect to typical
frequency
-
0.002
0.01
%
Input Capacitance 1
Ci
Except X1, X2
-
-
10
pF
Load Capacitance1
CL
Pins X1, X2
-
20
-
pF
Output High Voltage
Supply Current
Output High Current
Output Frequency Change over
Supply and Temperature1
Supply Current, lowest
IDDL
Short Circuit Current1
ISC
When powered-down
-
14
-
mA
-
30
-
mA
Note:
1. Parameter is guaranteed by design and characterization. Not 100% tested in production.
2. All clocks on AV9154A-60 running at highest possible frequencies.
5
AV9154A-60
Electrical Characteristics at 3.3V
Operating VDD =+3.0V to +3.7V, TA=0°C to 70°C unless otherwise stated
AC Characteristics
PARAMETER
Input Clock Rise time
SYMBOL
1
Input Clock Fall time1
1
TEST CONDITIONS
MIN
TYP
MAX
UNITS
tICr
-
-
20
ns
tICf
-
-
20
ns
tr
15pF load
-
-
4
ns
Fall time1
tf
15pF load
-
-
4
ns
Duty cycle, fixed clocks 1
dt
15pF load
40/60
48/52
60/40
%
dt
15pF load
Rise time
Duty cycle, reference clock
1
40/60
43/57
60/40
%
Jitter, one sigma1, 20-66 MHz
Tjls1
-
100
200
ps
Jitter, one sigma1,
below 20 MHz
Tjls2
-
0.5
2
%
Jitter, absolute 1 , 20-66 Mhz
Tjabs1
-350
±165
350
ps
-5
±3
±5
%
-
-
20
ms
-
15
1
Jitter, absolute , below 20 Mhz
Tjabs2
Frequency Transition time 1
tft
from 8 to 33 Mhz
Power-up time1
tpu
from off to 50 Mhz
Output Frequency 1
fo
2
Input Frequency 1
fi
-
14.318
Note:
1. Parameter is guaranteed by design and characterization. Not 100% tested in production.
6
-
ms
33
MHz
-
MHz
AV9154A-60
16-Pin SOIC Package
Ordering Information
AV9154A-60CS16
Example:
ICS XXXX-PPP M X#W
Lead Count & Package Width
Lead Count=1, 2 or 3 digits
W=.3” SOIC or .6” DIP; None=Standard Width
Package Type
S=SOIC
Pattern Number (2 or 3 digit number for parts with ROM code patterns)
Device Type (consists of 3 or 4 digit numbers)
Prefix
ICS, AV=Standard Device; GSP=Genlock Device
7
ICS reserves the right to make changes in the device data identified in this
publication without further notice. ICS advises its customers to obtain the latest
version of all device data to verify that any information being relied upon by the
customer is current and accurate.
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