MK3717SLFTR [IDT]
Clock Generator, 27MHz, CMOS, PDSO8, SOIC-8;
| 型号： | MK3717SLFTR |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Clock Generator, 27MHz, CMOS, PDSO8, SOIC-8 时钟 光电二极管 外围集成电路 晶体 |
| 文件： | 总4页 (文件大小：60K) |
| 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
MK3717
Low Cost 3.3 Volt VCXO
ICR O CLOC K
Features
Description
The MK3717 is ICS/MicroClock’s low cost,
low jitter, high performance 3.3 volt VCXO
designed to replace expensive VCXO modules.
The on-chip Voltage Controlled Crystal Oscillator
accepts a 0 to 3.3 V input voltage to cause the
output clocks to vary by ±100 ppm. Using
ICS/MicroClock’s patented VCXO techniques,
the device uses an inexpensive external 13.5 MHz
or 13.5135 MHz pullable crystal to produce a
VCXO output clock of 2x the crystal or HDTV
pixel rates.
• Packaged in 8 pin SOIC
• 3.3 V only operating voltage
• Provides 27.0 MHz and HDTV clocks
• Uses an inexpensive external crystal
• On-chip VCXO (patented) with pull range of
200ppm (minimum)
• VCXO tuning voltage of 0 to 3.3 V
• 12mA output drive capability at TTL levels
• Advanced, low power, sub-micron CMOS process
ICS/MicroClock manufactures the largest variety
of Set-Top Box and multimedia clock synthesizers
for all applications. If more clock outputs are
needed, see the MK2731 or MK377x family of
parts. Consult ICS/MicroClock to eliminate
VCXOs, crystals and oscillators from your board.
Block Diagram
VIN
X1
Voltage
Controlled
Crystal
13.5 MHz or
13.5135 MHz
pullable
PLL
and
Multiplier
Output
Buffer
Oscillator
X2
crystal
CLK
SELA
SELB
MDS 3717 A
1
Revision 032400
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA • 95126• (408)295-9800tel • www.icst.com
PRELIMIN ARY IN FO RMAT IO N
MK3717
Low Cost 3.3 Volt VCXO
ICR O CLOC K
Pin Assignment
Clock Select Table
X1
SELA
SELB
CLK
27
MK3717
13.5
0
0
1
1
0
1
0
1
13.5
74.175824
27.027
1
8
7
6
5
X2
X1
13.5135
13.5135
2
3
4
VDD
VIN
SELB
SELA
CLK
74.58083544
GND
8 pin (150 mil) SOIC
Pin Descriptions
Number
Name
X1
Description
1
2
3
4
5
6
7
8
Crystal connection. Connect to a pullable 13.5 MHz or 13.5135 MHz crystal.
VDD. Connect to + 3.3 V.
VDD
VIN
GND
CLK
SELA
SELB
X2
Voltage input to VCXO. Zero to 3.3 V analog input which controls the frequency of the VCXO.
Connect to ground.
Clock Output determined by SELA and SELB per table above.
Clock Select A. See table above.
Clock Select B. See table above.
Crystal connection. Connect to a pullable 13.5 MHz or 13.5135 MHz crystal.
Crystal Specifications
Correlation (load) capacitance
Initial accuracy
Drift over temperature and aging
C0/C1 ratio
14 pF
±20 ppm maximum
±50 ppm maximum
240 maximum
ESR
35 Wmaximum
MDS 3717 A
2
Revision 032400
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA • 95126• (408)295-9800tel • www.icst.com
PRELIMIN ARY IN FO RMAT IO N
MK3717
Low Cost 3.3 Volt VCXO
ICR O 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 = 3.3 V unless noted)
Operating Voltage, VDD
3.15
2.4
3.45
0.4
V
V
Output High Voltage, VOH
Output Low Voltage, VOL
IOH=-12mA
IOL=12mA
IOH=-4mA
No Load
V
Output High Voltage, VOH, CMOS level
Operating Supply Current, IDD
Short Circuit Current
VDD-0.4
V
TBD
±50
mA
mA
V
VIN, VCXO control voltage
0
3.3
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
Input Crystal Frequency
10
18
±30
1.5
1.5
60
MH z
ppm
ns
Input Crystal Accuracy
Output Clock Rise Time
0.8 to 2.0V
2.0 to 0.8V
At VDD/2
Output Clock Fall Time
ns
Output Clock Duty Cycle
40
50
%
Maximum Absolute Jitter, short term
Output frequency pullability, note 2
TBD
ps
0V £ VIN £ 3.3 V
±100
ppm
Notes: 1. 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.
2. With a ICS/MicroClock approved pullable crystal.
External Components
The MK3717 requires a minimum number of external components for proper operation. A decoupling
capacitor of 0.01µF should be connected between VDD and GND on pins 2 and 4, as close to the
MK3717 as possible. A series termination resistor of 33 Wmay be used for the clock output. The input
crystal must be connected as close to the chip as possible. The input crystal should be a parallel mode,
pullable, AT cut, with 14 pF load capacitance. See previous page for crystal specifications. Consult ICS for
recommended suppliers. IMPORTANT - read application note MAN05 before laying out the PCB.
MDS 3717 A
3
Revision 032400
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA • 95126• (408)295-9800tel • www.icst.com
PRELIMIN ARY IN FO RMAT IO N
MK3717
Low Cost 3.3 Volt VCXO
ICR O CLOC K
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC Publication No. 95.)
8 pin SOIC
Inches
Min
Millimeters
Symbol
A
Max
Min
1.35
0.10
0.33
0.19
4.80
3.80
1.27 BSC
5.80
0.25
0.41
Max
0.0532 0.0688
0.0040 0.0098
0.0130 0.0200
0.0075 0.0098
0.1890 0.1968
0.1497 0.1574
.050 BSC
1.75
0.24
0.51
0.24
5.00
4.00
A1
B
C
E
H
INDEX
AREA
D
E
e
H
h
0.2284 0.2440
0.0099 0.0195
0.0160 0.0500
6.20
0.50
1.27
1
2
h x 45°
L
D
A
L
A1
C
B
e
Ordering Information
Part/Order Number
MK3717S
Marking
MK3717S
MK3717S
Shipping packaging
Package
Temperature
0-70 °C
tubes
8 pin SOIC
8 pin SOIC
MK3717STR
tape and reel
0-70 °C
CHANGE HISTORY
Version Date first published
Status
Preliminary
Comments
Original
A
2/9/00
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems Incorporated (ICS) 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. ICS reserves the right to change any circuitry or specifications without notice. ICS does
not authorize or warrant any ICS product for use in life support devices or critical medical instruments.
MDS 3717 A
4
Revision 032400
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA • 95126• (408)295-9800tel • www.icst.com
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