DATASHEET
HDTV AUDIO/VIDEO CLOCK SOURCE
Description
The ICS662-03 provides synchronous clock generation for
audio sampling clock rates derived from an HDTV stream.
The device uses the latest PLL technology to provide
superior phase noise and long term jitter performance. The
device also supports a 27 MHz output clock for video
MPEG applications from an HDTV reference clock.
Please contact IDT if you have a requirement for an input
and output frequency not included here.
ICS662-03
Features
•
•
•
•
•
•
•
Packaged in 8-pin SOIC
Pb (lead) free package, RoHS compliant
HDTV clock input
Low phase noise
Exact (0 ppm) multiplication ratios
Support for 256 and 384 times sampling rate
Supports 27 MHz output for video (MPEG)
Block Diagram
VDD
SEL3:0
Control
Circuitry
PLL
Clock
Synthesis
CLK
REF_IN
GND
IDT™ / ICS™
HDTV AUDIO/VIDEO CLOCK SOURCE
1
ICS662-03
REV G 051310
ICS662-03
HDTV AUDIO/VIDEO CLOCK SOURCE
CLOCK SYNTHESIZER
Pin Assignment
Output Clock Selection Table
S3
0
S2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
S1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
S0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Input
Frequency
(MHz)
74.175824
74.175824
74.175824
74.175824
74.175824
74.175824
74.175824
74.175824
74.25
74.25
74.25
74.25
74.25
74.25
74.25
74.25
Output
Frequency
(MHz)
8.192
11.2896
12.288
24.576
16.9344
18.432
36.864
27
8.192
11.2896
12.288
24.576
16.9344
18.432
36.864
27
REF_IN
VDD
GND
S2
1
2
3
4
8
7
6
5
S0
S3
S1
CLK
0
0
0
0
0
0
0
1
1
8 pin (150 mil) SOIC
1
1
1
1
1
1
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
Pin
Name
REF_IN
VDD
GND
S2
CLK
S1
S3
S0
Pin
Type
Input
Power
Power
Input
Output
Input
Input
Input
Connect to +3.3 V.
Connect to ground.
Pin Description
Connect this pin to a HDTV clock input.
Output frequency selection. Determines output frequency per table above. On chip pull-up.
Clock output.
Output frequency selection. Determines output frequency per table above. On chip pull-up.
Output frequency selection. Determines output frequency per table above. On chip pull-up.
Output frequency selection. Determines output frequency per table above. On chip pull-up.
IDT™ / ICS™
HDTV AUDIO/VIDEO CLOCK SOURCE
2
ICS662-03
REV G 051310
ICS662-03
HDTV AUDIO/VIDEO CLOCK SOURCE
CLOCK SYNTHESIZER
Application Information
Series Termination Resistor
Clock output traces should use series termination. To series
terminate a 50Ω trace (a commonly used trace impedance),
place a 33Ω resistor in series with the clock line, as close to
the clock output pin as possible. The nominal impedance of
the clock output is 20Ω
.
the component side of the board as close to the VDD pin as
possible. No vias should be used between decoupling
capacitor and VDD pin. The PCB trace to VDD pin should
be kept as short as possible, as should the PCB trace to the
ground via. Distance of the ferrite bead and bulk decoupling
from the device is less critical.
2) To minimize EMI and obtain the best signal integrity, the
33Ω series termination resistor should be placed close to
the clock output.
3) An optimum layout is one with all components on the
same side of the board, minimizing vias through other signal
layers (the ferrite bead and bulk decoupling capacitor can be
mounted on the back). Other signal traces should be routed
away from the ICS662-03. This includes signal traces just
underneath the device, or on layers adjacent to the ground
plane layer used by the device.
Decoupling Capacitors
As with any high performance mixed-signal IC, the
ICS662-03 must be isolated from system power supply
noise to perform optimally.
Decoupling capacitors of 0.01µF must be connected
between VDD (pin 2) and the PCB ground plane (pin 3).
PCB Layout Recommendations
For optimum device performance and lowest output phase
noise, the following guidelines should be observed.
1) Each 0.01µF decoupling capacitor should be mounted on
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS662-03. These ratings, which are
standard values for IDT commercially rated parts, are stress ratings only. 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 can affect product reliability. Electrical
parameters are guaranteed only over the recommended operating temperature range.
Item
Supply Voltage, VDD
All Inputs and Outputs
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Soldering Temperature
5.5 V
Rating
-0.5 V to VDD+0.5 V
0 to +70° C
-65 to +150° C
125° C
260° C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
Min.
0
+3.0
Typ.
Max.
+70
+3.6
Units
°
C
V
IDT™ / ICS™
HDTV AUDIO/VIDEO CLOCK SOURCE
3
ICS662-03
REV G 051310
ICS662-03
HDTV AUDIO/VIDEO CLOCK SOURCE
CLOCK SYNTHESIZER
DC Electrical Characteristics
Unless stated otherwise,
VDD = 3.3 V ±10%,
Ambient Temperature 0 to +70° C
Parameter
Operating Voltage
Supply Current
Input High Voltage
Input Low Voltage
Output High Voltage
Output High Voltage
Output Low Voltage
Short Circuit Current
Nominal Output Impedance
Input Capacitance
Internal pull-up resistor
Symbol
VDD
IDD
V
IH
V
IL
V
OH
V
OH
V
OL
I
OS
Z
OUT
C
IN
R
PU
Conditions
No Load, first 8 modes
No Load, last 8 modes
Min.
3.0
Typ.
3.3
25
16
Max.
3.6
29
21
0.8
Units
V
mA
mA
V
V
V
V
2
I
OH
= -4 mA
I
OH
= -12 mA
I
OL
= 12 mA
Each output
input pins
S2 pin
S3, S1, S0 pins
±50
20
7
510
120
VDD-0.4
2.4
0.4
V
mA
Ω
pF
kΩ
kΩ
AC Electrical Characteristics
Unless stated otherwise,
VDD = 3.3 V ±10%,
Ambient Temperature 0 to +70° C
Parameter
Output Clock Rise Time
Output Clock Fall Time
Output Duty Cycle
Jitter, short term
Symbol
t
OR
t
OF
t
OD
t
P-P
Conditions
20% to 80%, 15 pF load
80% to 20%, 15 pF load
at VDD/2, 15 pF load
15 pF load
27M output, 15 pF load,
first 8 modes,
1000 cycles delay
27M output, 15 pF load,
last 8 modes,
1000 cycles delay
Min.
Typ.
1.2
1.0
Max.
1.5
1.5
55
Units
ns
ns
%
ps
ps
45
+75
900
Jitter, long term
600
0
ps
ppm
Frequency Synthesis Error
Thermal Characteristics
Parameter
Thermal Resistance Junction to
Ambient
Symbol
θ
JA
θ
JA
θ
JA
θ
JC
Conditions
Still air
1 m/s air flow
3 m/s air flow
Min.
Typ.
150
140
120
40
Max. Units
°
C/W
°
C/W
°
C/W
°
C/W
Thermal Resistance Junction to Case
IDT™ / ICS™
HDTV AUDIO/VIDEO CLOCK SOURCE
4
ICS662-03
REV G 051310
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