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PDF AV9108 Data sheet ( Hoja de datos )
| Número de pieza | AV9108 | |
| Descripción | CPU Frequency Generator | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AV9108 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Integrated
Circuit
Systems, Inc.
AV9108
CPU Frequency Generator
General Description
The AV9108 offers a tiny footprint solution for generating two
simultaneous clocks. One clock, the REFCLK, is a fixed output
frequency which is the same as the input reference crystal (or
clock). The other clock, CLK1, can vary between 2 and 120
MHz, with up to 16 selectable preprogrammed frequencies
stored in internal ROM.
The ICS9108 is ideal for use in a 3.3V system. It can generate
a 66.66 MHz clock at 3.3V. In addition, the ICS9108 provides
a symmetrical wave form with a worst case duty cycle of 45/55.
The ICS9108 has very tight edge control between the CPU
clock and 2XCPU clock outputs, with a worst case skew of
250ps.
The device has advanced features which include on-chip loop
filters, tristate outputs, and power-down capability. A mini-
mum of external components - two decoupling capacitors and
an optional ferrite bead - are all that are required for jitter-free
operation. Standard versions for computer motherboard appli-
cations are the AV9108-03, AV9108-05 and the ICS9108-10.
Custom masked versions, with customized frequencies and
features, are available in 6-8 weeks for a small NRE fee.
Features
• Runs up to 80 MHz at 3.3V
• 50/50 typical duty cycle at 5V
• ±250ps absolute jitter
• Generates frequencies from 2 to 140 MHz
• 2 to 32 MHz input reference frequency
• Up to 16 frequencies stored internally
• Patented on-chip Phase Locked Loop with VCO for clock
generation
• Provides reference clock and synthesized clock
• On-chip loop filter
• Low power 0.8µ CMOS technology
• 8-pin or 14-pin DIP or SOIC package
Block Diagram
AV 9108 RevB032195
1 page  
AV9108
Absolute Maximum Ratings
AVDD, VDD 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 -0.5V 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
(Operating VDD = +4.5V to +5.5V; TA =0°C to 70°C unless otherwise stated)
PARAMETER
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
Output Low Voltage
Output High Voltage, Note 1
Output Low Current, Note 1
Output High Current, Note 1
Supply Current
Supply Current
Supply Current
Pull-up Resistor, Note 1
Rise Time 0.8 to 2.0V, Note 1
Fall Time 2.0 to 0.8V, Note 1
Rise Time 20% to 80%, Note 1
Fall Time 80% to 20%, Note 1
Duty Cycle, Note 1
Jitter, One Sigma, Note 1
Jitter, One Sigma, Note 1
Jitter, One Sigma, Note 1
Jitter, Absolute, Note 1
Jitter, Absolute, Note 1
Jitter, Absolute, Note 1
Input Frequency, Note 1
Output Frequency
Power-up Time, Note 1
Transition Time, Note 1
DC Characteristics
SYMBOL
TEST CONDITIONS
VIL
VIH
IIL
IIH
VOL
VOH
IOL
IOH
ICC
ICC
(PD low)
ICC
(PD low)
Rpu
VIN=0V
VIN=VDD
IOL=10mA
IOH=-30mA
VOL=0.8V
VOH=2.0V
Unload, 50 MHz
Unload, Logic Inputs 000
Unload, Logic Inputs 111
AC Characteristics
Tr 15pf load
Tf 15pf load
Tr 15pf load
Tf 15pf load
Dt 15pf load @ 1.4V
Tjis From 20 to 100 MHz
Tjis From 14 to 16 MHz
Tjis From 14 to Below
Tjab From 20 to 100 MHz
Tjab From 14 to 16 MHz
Tjab From 14 to Below
Fi
Fo
Tpu
Tft 8 to 66.6 MHz
MIN
-
2.0
-
-2.0
-
2.4
22.0
-
-
-
-
-
-
-
-
-
45.0
-
-250.0
-500.0
11.0
2.0
-
-
TYP
-
-
6.0
-
0.15
3.25
35.0
-50.0
18.0
38.0
14.0
380.0
0.60
0.40
2.0
1.0
50.0
50.0
100.0
0.2
1.0
14.3
-
7.58
6.0
MAX
0.8
-
16
2.0
0.40
-
-
-35.0
42.0
100.0
40.0
700.0
1.40
1.00
3.5
2.5
55.0
150.0
200.0
1.0
250.0
500.0
3.0
19.0
120.0
18.0
13.0
UNITS
V
V
µA
µA
V
V
mA
mA
mA
µA
µA
k ohms
ns
ns
ns
ns
%
ps
ps
%
ps
ps
%
MHz
MHz
ms
ms
Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production.
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AV9108.PDF ] | |
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