DATASHEET
ICS650-12
MPEG CLOCK SYNTHESIZER
Description
Features
The ICS650-12 is a low cost, low-jitter, high-performance
clock synthesizer designed to produce fixed clock outputs of
13.5 MHz and 27.0 MHz, and four selectable clock outputs:
two Processor Clocks (PCLK1) and PCLK2), an Audio
Clock, and a Communications Clock (CCLK). Using analog
Phase-Locked Loop (PLL) techniques, the device uses a
27.0 MHz clock or fundamental crystal to produce clocks
ideal for Digital Video/MPEG-based applications.
• Packaged in 20-pin tiny SSOP (QSOP)
• RoHS 5 (green) or RoHS 6 (green and lead free)
compliant package
• Input frequency of 27.0 MHz
• Zero ppm synthesis error in output clocks
• Provides fixed 13.5 MHz and 27.0 MHz. Also provides
•
•
•
two selectable processor clocks, one audio clock, and
one communications clock.
Ideal for digital video MPEG-based applications
3.3 V or 5.0 V operating voltage
Entire chip powers down (when CS1=CS0=0)
Block Diagram
PCLK1
PS2:0
AS2:0
PCLK2
Clock
Synthesis
and Control
Circuitry
CS1:0
ACLK
CCLK
13.5 MHz
27.0 MHz crystal
or clock
IDT™ / ICS™ MPEG CLOCK SYNTHESIZER
/2
Input
Buffer/
Crystal
Oscillator
27.0 MHz
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CLOCK SYNTHESIZER
Pin Assignment
ACLK Select Table (in MHz)
PS2
1
20
PS1
X2
2
19
PS0
X1
3
18
CCLK
VDD
4
17
PCLK2
CS1
5
16
VDD
GND
6
15
AS1
ACLK
7
14
GND
PCLK1
8
13
CS0
9
AS2
10
AS2
PS0
ACLK
0
0
12.288
0
0
1
11.2896
0
1
0
8.192
0
1
1
24.576
1
0
0
8.192
13.5M
1
0
1
16.9344
12
27M
1
1
0
18.432
11
AS0
1
1
1
11.2896
CCLK Select Table (in MHz)
PCLK1 and PCLK2 Select Table (in MHz)
PS1
AS0
0
20-pin SSOP (QSOP)
PS2
AS1
PCLK1
PCLK2
CS1
CS0
CCLK
0
0
All off*
0
1
20.00
0
0
0
108.00
54.00
1
0
66.6666
0
0
1
55.00
27.5
1
1
24.576
0
1
0
66.67
33.33
0
1
1
80.00
40.00
1
0
0
54.00
27.00
1
0
1
81.00
40.5
1
1
0
50.00
25.00
1
1
1
60.00
30.00
IDT™ / ICS™ MPEG CLOCK SYNTHESIZER
*Note: Entire chip powers-down (outputs stop low) when
CS1=CS0=0.
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CLOCK SYNTHESIZER
Pin Descriptions
Pin
Pin
Pin
Number Name Type
Pin Description
1
PS2
Input
Processor Clock Select pin 2. See table on page 2.
2
X2
XO
Crystal connection. Connect to a 27.0 MHz crystal or leave unconnected for a clock input.
3
X1
XI
Crystal connection. Connect to a 27.0 MHz fundamental mode crystal or clock input.
4, 16
VDD
Power
Connect to +3.3 V or +5 V.
5
CS1
Input
Communications Clock Select Pin 1. See table on page 2.
6, 14
GND
Power
Connect to ground.
7
ACLK
Output
Audio Clock Output. See table on page 2.
8
PCLK1
Output
Processor Clock Output 1. See table on page 2.
9
CS0
Input
Communications Clock Select 0. See table on page 2.
10
AS2
Input
Audio Clock Select Pin 2. See table on page 2.
Audio Clock Select Pin 0. See table on page 2.
11
AS0
Input
12
27M
Output
13
13.5M
Output
15
AS1
Input
Audio Clock Select Pin 1. See table on page 2.
17
PCLK2
Output
Processor Clock Output 2. See table on page 2.
18
CCLK
Output
19
PS0
Input
Processor Clock Select Pin 0. See table on page 2.
20
PS1
Input
Processor Clock Select Pin 1. See table on page 2.
27 MHz buffered clock output.
13.5 MHz clock output.
Communications Clock Output. See table on page 2.
Key: Input = input with internal pull-up; XI and XO = crystal
connections; Power = power supply connection; Output =
output
IDT™ / ICS™ MPEG CLOCK SYNTHESIZER
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CLOCK SYNTHESIZER
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS650-12. 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
Conditions
Supply Voltage, VDD
Referenced to GND
All Inputs and Outputs
Referenced to GND
Rating
7V
-0.5 V to VDD+0.5 V
Ambient Operating Temperature
0 to +70° C
Storage Temperature
-65 to +150° C
Soldering Temperature
Max. of 10 seconds
260° C
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V or 5 V, Ambient Temperature 0 to +70° C
Parameter
Symbol
Conditions
Min.
Operating Voltage
VDD
3.0
Input High Voltage
VIH
2
Input Low Voltage
VIL
Typ.
Output High Voltage
VOH
VDD = 3.3 V, IOH = -8 mA
VOL
VDD = 3.3 V, IOL = 8 mA
Output High Voltage
VOH,VDD = 3.3
or 5 V
IOH = -8 mA
Units
5.5
V
VDD/2
VDD/2
Output Low Voltage
Max.
V
0.8
V
0.8
V
2.4
V
VDD-0.4
V
Operating Supply Current
IDD@5 V
No Load
39
mA
Operating Supply Current
IDD@5 V
No Load
22
mA
±50
mA
7
pF
Short Circuit Current
IOS, VDD = 3.3 V Each output
Input Capacitance
IDT™ / ICS™ MPEG CLOCK SYNTHESIZER
Except X1
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CLOCK SYNTHESIZER
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V or 5 V, Ambient Temperature 0 to +70° C
Parameter
Symbol
Conditions
Min.
Input Crystal or Clock Frequency
Typ.
Max. Units
27
Output Clocks Accuracy (synthesis error)
All clocks
0
MHz
1
ppm
Output Clock Rise Time
tOR
0.8 to 2.0 V
1.5
ns
Output Clock Fall Time
tOF
2.0 to 0.8 V
1.5
ns
60
%
Output Clock Duty Cycle
At VDD/2
One Sigma Jitter, ACLK
VDD = 3.3 V
100
ps
VDD = 5.0 V
40
ps
VDD = 3.3 V, except
CCLK = 20 MHz
±300
ps
VDD = 5.0 V, except
CCLK = 20 MHz
±200
ps
Absolute Clock Period Jitter
40
50
External Components
A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01 µF
should be connected between VDD and GND on pins 4 and 6, 16 and 14, and a 33Ω terminating resistor may be
used on each clock output if the trace is longer than 1 inch.
IDT™ / ICS™ MPEG CLOCK SYNTHESIZER
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Package Outline and Package Dimensions (20-pin SSOP)
Package dimensions are kept current with JEDEC Publication No. 95
20
Millimeters
Symbol
E1
A
A1
b
c
D
E
E1
e
L
α
E
INDEX
AREA
1 2
D
Min
Inches
Max
1.35
1.75
0.10
0.25
0.20
0.30
0.18
0.25
8.55
8.75
5.80
6.20
3.80
4.00
0.635 Basic
0.40
1.27
0°
8°
Min
Max
0.053
0.069
0.004
0.010
0.008
0.012
0.007
0.010
0.337
0.344
0.228
0.244
0.150
0.157
0.025 Basic
0.016
0.050
0°
8°
A
A1
c
- Ce
b
SEATING
PLANE
.10 (.004)
L
C
Ordering Information
Part / Order Number
Marking
Shipping Packaging
Package
Temperature
650R-12LF
650R-12LFT
650R-12LF
650R-12LF
Tubes
Tape and Reel
20-pin SSOP
20-pin SSOP
0 to +70° C
0 to +70° C
"LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes
no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No
other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications
such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not
recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT
does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.
IDT™ / ICS™ MPEG CLOCK SYNTHESIZER
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CLOCK SYNTHESIZER
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