ICS615
Set-Top Box Clock Source
MDS 615 A
1
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.·525 Race Street·San Jose·CA·95126·(408)295-9800tel·www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
I C R O
C
LOC K
Block Diagram
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 .
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.
· 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.
Input
Buffer/
Crystal
Oscillator
PLL/Clock
Synthesis
Circuitry
13.5 MHz
Clock or
Crystal
X1
X2
Output
Buffer
54 MHz Clock
Output
Buffer
13.5 MHz Clock
Output
Buffer
27 MHz Clock
VDD GND
ICS615
Set-Top Box Clock Source
MDS 615 A
2
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.·525 Race Street·San Jose·CA·95126·(408)295-9800tel·www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
I C R O
C
LOC K
Pin Descriptions
Pin Assignment
Number
Name
Description
1
27M
27 MHz clock output.
2
GND
Connect to ground.
3
X1
Crystal connection. Connect to a13.5 MHz clock or crystal.
4
X2
Crystal connection. Connect to a 13.5 MHz crystal. Leave unconnected for clock input.
5
54M
54 MHz clock output.
6
13.5M
13.5 MHz clock output.
7
VDD
VDD. Connect to +3.3V or +5V.
8
NC
No Connect. This is an unused power down pin for 27 MHz clock
8 pin (150 mil) SOIC
ICS615
1
8
2
3
4
7
6
5
X1
GND
X2
VDD
27M
NC
54M
13.5M
ICS615
Set-Top Box Clock Source
MDS 615 A
3
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.·525 Race Street·San Jose·CA·95126·(408)295-9800tel·www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
I C R O
C
LOC K
Parameter
Conditions
Minimum
Typical
Maximum
Units
ABSOLUTE MAXIMUM RATINGS (note 1)
ABSOLUTE MAXIMUM RATINGS (note 1)
Supply voltage, VDD
Referenced to GND
7
V
Inputs and Clock Outputs
Referenced to GND
-0.5
VDD+0.5
V
Ambient Operating Temperature
0
70
°C
Soldering Temperature
Max of 10 seconds
260
°C
Storage temperature
-65
150
°C
DC CHARACTERISTICS (VDD = 5.0V unless noted)
DC CHARACTERISTICS (VDD = 5.0V unless noted)
Operating Voltage, VDD
3.00
5.50
V
Output High Voltage, VOH
IOH=-4mA
2.4
V
Output Low Voltage, VOL
IOL=4mA
0.4
V
Output High Voltage, VOH, CMOS level
IOH=-4mA
VDD-0.4
V
Operating Supply Current, IDD
No Load
30
mA
Short Circuit Current
±30
mA
AC CHARACTERISTICS (VDD = 5.0V unless noted)
AC CHARACTERISTICS (VDD = 5.0V unless noted)
Input Clock
13.5
MHz
Output Clock Rise Time
0.4 to 2.4V, CL=25pF
1.5
2.5
ns
Output Clock Fall Time
2.4 to 0.4V, CL=25pF
1.5
2.5
ns
Output Clock Duty Cycle
At 1.4V
45
50
55
%
Skew between any two outputs
1
ns
Maximum Absolute Jitter, short term
250
ps
Electrical Specifications
Note:
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 33
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.
ICS615
Set-Top Box Clock Source
MDS 615 A
4
Revision 052098
Printed 11/15/00
Integrated Circuit Systems, Inc.·525 Race Street·San Jose·CA·95126·(408)295-9800tel·www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
I C R O
C
LOC K
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.
Package Outline and Package Dimensions
Ordering Information
Part/Order Number
Marking
Shipping packaging
Package
Temperature
ICS615M
ICS615M
tubes
8 pin SOIC
0-70°C
ICS615MT
ICS615M
tape and reel
8 pin SOIC
0-70°C
CHANGE HISTORY
Version Date first published
Status
Comments
A
5/20/98
Preliminary
Original
Inches
Inches
Millimeters
Millimeters
Symbol
Min
Max
Min
Max
A
0.055
0.068
1.397
1.7272
b
0.013
0.019
0.330
0.483
D
0.185
0.200
4.699
5.080
E
0.150
0.160
3.810
4.064
H
0.225
0.245
5.715
6.223
e .050 BSC
.050 BSC
1.27 BSC
1.27 BSC
h
0.015
0.381
Q
0.004
0.01
0.102
0.254
8 pin SOIC
c
A
b
D
E
H
e
h x 45°
Q
Pin 1
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