ICS615 [ICSI]
Set-Top Box Clock Source; 机顶盒时钟源
| 型号： | ICS615 |
| 厂家： | 
INTEGRATED CIRCUIT SOLUTION INC |
| 描述： | Set-Top Box Clock Source |
| 文件： | 总4页 (文件大小：61K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRELIMIN ARY IN FO RMAT IO N
ICS615
Set-Top Box Clock Source
ICRO CLOC K
Features
Description
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
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.
• See the MK2720 for these frequencies plus the
VCXO function, in an 8 pin SOIC.
Block Diagram
VDD GND
Output
54 MHz Clock
Buffer
PLL/Clock
Synthesis
Circuitry
13.5 MHz
Clock or
Crystal
Output
X1
X2
27 MHz Clock
Buffer
Input
Buffer/
Crystal
Oscillator
Output
13.5 MHz Clock
Buffer
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
PRELIMIN ARY IN FO RMAT IO N
ICS615
Set-Top Box Clock Source
ICRO CLOC K
Pin Assignment
ICS615
1
2
3
4
8
7
6
5
27M
NC
GND
VDD
13.5M
54M
X1
X2
8 pin (150 mil) SOIC
Pin Descriptions
Number
Name
27M
GND
X1
Description
1
2
3
4
5
6
7
8
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.
X2
54M
13.5M
VDD
NC
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
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
PRELIMIN ARY IN FO RMAT IO N
ICS615
Set-Top Box Clock Source
ICRO CLOC K
Electrical Specifications
Parameter
Conditions
Minimum
Typical
Maximum Units
ABSOLUTE MAXIMUM RATINGS (note 1)
Supply voltage, VDD
Referenced to GND
7
VDD+0.5
70
V
V
Inputs and Clock Outputs
Ambient Operating Temperature
Soldering Temperature
Storage temperature
Referenced to GND
Max of 10 seconds
-0.5
0
°C
°C
°C
260
-65
150
DC CHARACTERISTICS (VDD = 5.0V unless noted)
Operating Voltage, VDD
3.00
2.4
5.50
0.4
V
V
Output High Voltage, VOH
Output Low Voltage, VOL
IOH=-4mA
IOL=4mA
IOH=-4mA
No Load
V
Output High Voltage, VOH, CMOS level
Operating Supply Current, IDD
Short Circuit Current
VDD-0.4
V
30
mA
mA
±30
AC CHARACTERISTICS (VDD = 5.0V unless noted)
Input Clock
13.5
1.5
1.5
50
MH z
ns
Output Clock Rise Time
0.4 to 2.4V, CL=25pF
2.4 to 0.4V, CL=25pF
At 1.4V
2.5
2.5
55
1
Output Clock Fall Time
ns
Output Clock Duty Cycle
45
%
Skew between any two outputs
Maximum Absolute Jitter, short term
ns
250
ps
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 33Wmay 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.
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
PRELIMIN ARY IN FO RMAT IO N
ICS615
Set-Top Box Clock Source
ICRO CLOC K
Package Outline and Package Dimensions
8 pin SOIC
Inches
Millimeters
Min Max
0.055 0.068 1.397 1.7272
Symbol Min
Max
A
b
E
H
0.013 0.019 0.330
0.185 0.200 4.699
0.150 0.160 3.810
0.225 0.245 5.715
0.483
5.080
4.064
6.223
Pin 1
D
E
H
e
.050 BSC
0.015
0.01
1.27 BSC
h
0.381
0.254
h x 45°
D
Q
0.004
0.102
A
Q
c
b
e
Ordering Information
Part/Order Number
ICS615M
Marking
Shipping packaging
tubes
Package
Temperature
0-70°C
ICS615M
ICS615M
8 pin SOIC
8 pin SOIC
ICS615MT
tape and reel
0-70°C
CHANGE HISTORY
Version Date first published
Status
Preliminary
Comments
Original
A
5/20/98
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.
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
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