ICST ICS615M Set-top box clock source Datasheet

PRELIMINARY INFORMATION
ICS615
Set-Top Box Clock Source
I C R O C LOC K
Description
Features
The ICS615 is a low cost, low jitter, high
performance PLL clock synthesizer designed to
replace 13.5, 27, and 54MHz crystals and
oscillators. Using analog/digital Phase-Locked
Loop (PLL) techniques, the device uses an
inexpensive external 13.5 MHz crystal or clock
input to produce output clocks of 13.5 MHz,
27 MHz, and 54 MHz .
• Packaged in 8 pin narrow SOIC
• Output clocks of 54, 27, and 13.5MHz
• Uses a 13.500 MHz clock or external crystal
• Full CMOS outputs with 25mA output drive
capability at TTL levels
• Low skew outputs
• Advanced, low power, sub-micron CMOS process
• +3.3V or +5V operating voltage
• See the MK2720 for these frequencies plus the
VCXO function, in an 8 pin SOIC.
ICS/MicroClock manufactures the largest variety
of Set-Top Box and multimedia clock synthesizers
for all applications. Our patented integrated
VCXO further reduces component count and cost
(see the MK2720). If more than three clock
outputs are needed, see the MK277x family of
parts. Consult ICS/MicroClock to eliminate
VCXOs, PLLs, crystals and oscillators from your
board.
Block Diagram
VDD GND
13.5 MHz
Clock or
Crystal
X1
X2
Input
Buffer/
Crystal
Oscillator
PLL/Clock
Synthesis
Circuitry
Output
Buffer
54 MHz Clock
Output
Buffer
27 MHz Clock
Output
Buffer
13.5 MHz Clock
1
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•(408)295-9800tel•www.icst.com
MDS 615 A
PRELIMINARY INFORMATION
ICS615
Set-Top Box Clock Source
I C R O C LOC K
Pin Assignment
ICS615
27M
1
8
NC
GND
2
7
VDD
X1
3
6
13.5M
X2
4
5
54M
8 pin (150 mil) SOIC
Pin Descriptions
Number
1
2
3
4
5
6
7
8
Name
27M
GND
X1
X2
54M
13.5M
VDD
NC
Description
27 MHz clock output.
Connect to ground.
Crystal connection. Connect to a13.5 MHz clock or crystal.
Crystal connection. Connect to a 13.5 MHz crystal. Leave unconnected for clock input.
54 MHz clock output.
13.5 MHz clock output.
VDD. Connect to +3.3V or +5V.
No Connect. This is an unused power down pin for 27 MHz clock
2
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•(408)295-9800tel•www.icst.com
MDS 615 A
PRELIMINARY INFORMATION
I C R O C LOC K
ICS615
Set-Top Box Clock Source
Electrical Specifications
Parameter
Conditions
Minimum
Typical
Maximum
Units
7
VDD+0.5
70
260
150
V
V
°C
°C
°C
5.50
V
V
V
V
mA
mA
ABSOLUTE MAXIMUM RATINGS (note 1)
Supply voltage, VDD
Inputs and Clock Outputs
Ambient Operating Temperature
Soldering Temperature
Storage temperature
Referenced to GND
Referenced to GND
-0.5
0
Max of 10 seconds
-65
DC CHARACTERISTICS (VDD = 5.0V unless noted)
Operating Voltage, VDD
Output High Voltage, VOH
Output Low Voltage, VOL
Output High Voltage, VOH, CMOS level
Operating Supply Current, IDD
Short Circuit Current
IOH=-4mA
IOL=4mA
IOH=-4mA
No Load
3.00
2.4
0.4
VDD-0.4
30
±30
AC CHARACTERISTICS (VDD = 5.0V unless noted)
Input Clock
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle
Skew between any two outputs
Maximum Absolute Jitter, short term
Note:
0.4 to 2.4V, CL=25pF
2.4 to 0.4V, CL=25pF
At 1.4V
45
13.5
1.5
1.5
50
250
2.5
2.5
55
1
MHz
ns
ns
%
ns
ps
Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged
exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.
External Components
The ICS615 requires a minimum number of external components for proper operation. A decoupling
capacitor of 0.1µF should be connected between VDD and GND on pins 7 and 2, as close to the ICS615
as possible. A series termination resistor of 33Ω may be used for the clock outputs. The normal use is with a
clock input into pin 3, with pin 4 left unconnected. For a crystal input, consult ICS/MicroClock.
3
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•(408)295-9800tel•www.icst.com
MDS 615 A
PRELIMINARY INFORMATION
ICS615
Set-Top Box Clock Source
I C R O C LOC K
Package Outline and Package Dimensions
8 pin SOIC
E
Symbol
A
b
D
E
H
e
h
Q
H
Pin 1
h x 45°
D
Inches
Min
Max
0.055 0.068
0.013 0.019
0.185 0.200
0.150 0.160
0.225 0.245
.050 BSC
0.015
0.004
0.01
Millimeters
Min
Max
1.397 1.7272
0.330
0.483
4.699
5.080
3.810
4.064
5.715
6.223
1.27 BSC
0.381
0.102
0.254
A
Q
c
e
b
Ordering Information
Part/Order Number
ICS615M
ICS615MT
CHANGE HISTORY
Version Date first published
A
5/20/98
Marking
ICS615M
ICS615M
Status
Preliminary
Shipping packaging
tubes
tape and reel
Package
8 pin SOIC
8 pin SOIC
Temperature
0-70°C
0-70°C
Comments
Original
While the information presented herein has been checked for both accuracy and reliability, ICS/MicroClock 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 ICS/MicroClock. ICS/MicroClock reserves the right to change any circuitry or specifications without notice. ICS/MicroClock
does not authorize or warrant any ICS/MicroClock product for use in life support devices or critical medical instruments.
4
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•(408)295-9800tel•www.icst.com
MDS 615 A
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