MK1714-02RI [ICSI]
Spread Spectrum Multiplier Clock; 扩频时钟乘法器
| 型号： | MK1714-02RI |
| 厂家： | 
INTEGRATED CIRCUIT SOLUTION INC |
| 描述： | Spread Spectrum Multiplier Clock |
| 文件： | 总5页 (文件大小：75K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MK1714-02
Spread Spectrum Multiplier Clock
Description
Features
The MK1714-02 is a low cost, high performance
clock synthesizer with selectable multipliers and
spread amounts (percentages), designed to
generate high frequency clocks with low EMI.
Using analog/digital Phase-Locked Loop (PLL)
techniques, the device accepts an inexpensive,
fundamental mode, parallel resonant crystal, or a
clock input to produce a spread, or dithered,
output, thereby reducing the frequency amplitude
peaks by several dB. The OE pin puts both outputs
into a high impedance state for board level testing.
The PD# pin powers down the entire chip, and the
outputs are held low.
• Packaged in 20 pin tiny SSOP (QSOP)
• Operating VDD of 3.3 V or 5 V
• Multiplier modes of x1, x2, x3, x4, x5, and x6
• Inexpensive 10-25 MHz crystal, or clock input
• OE pin tri-states the outputs for testing
• Power down pin stops the outputs low
• Selectable frequency spread
• Spread can be turned on or off
• Duty cycle of 40/60
• Advanced, low power CMOS process
• Industrial temperature range available
Block Diagram
VDD
5
GND
S4:0
PD
PLL Clock
Multiplier and
Spread
Output
Buffer
Clock Out
Spectrum
Circuitry
Low EMI
Enable
Input crystal
or clock
X1
X2
Crystal
Oscillator
Output
Buffer
REF
XSEL
OE (both outputs)
MDS 1714-02 C
1
Revision 120400
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
MK1714-02
Spread Spectrum Multiplier Clock
Pin Assignment
REF
X2
X1/ICLK
VDD
VDD
S4
1
2
3
4
5
6
7
20
19 OE
18 PD
GND
17
16
S0
S3
15
14
13
12
11
NC
GND
S1
GND
S2
8
GND
LEE
XSEL
9
10
CLK
20 pin.150 mil SSOP (QSOP)
Pin Descriptions
Pin #
Name
X2
X1/ICLK
VDD
VDD
S4
Type Description
1
2
3
4
5
6
7
XO
XI
P
Crystal connection. Connect to parallel mode crystal. Leave open for clock.
Crystal connection. Connect to parallel mode crystal, or clock.
Connect to VDD. Must be same value as other VDD.
P
Connect to VDD. Must be same value as other VDD. Decouple with pin 7.
I(D) Select pin number 4. Determines multiplier and spread amount per table on following page.
S3
I
P
P
I
O
I
I
P
I
Select pin number 3. Determines multiplier and spread amount per table on following page.
Connect to ground.
Connect to ground.
Select pin number 2. Determines multiplier and spread amount per table on following page.
Clock output which depends on the input, multiplier and spread amount per table on page 3.
Connect to VDD for crystal input, or GND for CLK input.
Low EMI Enable. Turns on the Spread spectrum when high.
Connect to ground.
GND
GND
S2
CLK
XSEL
LEE
GND
S1
NC
S0
GND
PD
OE
8
9
10
11
12
13
14
Select pin number 1. Determines multiplier and spread amount per table on following page.
No Connect.
15
16
17
18
19
20
-
I
P
I
Select pin number 0. Determines multiplier and spread amount per table on following page.
Connect to ground.
Power Down. Turns off the chip when low. Outputs stop low.
Output Enable. Tri-states all outputs when low.
I
REF
O
Reference clock output from crystal oscillator.
Key: I = Input with internal pull-up; I(D) = Input with internal pull-down; XO/XI = crystal connections;
O = output; P = power supply connection
MDS 1714-02 C
2
Revision 120400
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
MK1714-02
Spread Spectrum Multiplier Clock
Clock Output Select Table (in MHz)
S4 S3 S2 S1 S0 Input Range Multiplier Output Range Direction Amount (%) 3.3/5V
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
40-80
60-120
40-80
80-150
10-30
20-60
10-25
20-60
20-30
40-75
40-100
40-75
20-40
20-60
10-20
10-30
20-37.5
20-40
10-30
20-30
5-20
20-50
20-37.5
80-150
10-25
10-20
10-20
20-50
10-25
10-20
10-20
10-30
x1
x1
x1
x1
x2
x2
x2
x2
x3
x2
x1
x2
x1
x1
x1
x1
x4
x3
x1
x1
x2
x3
x4
x1
x4
x5
x6
x1
x4
x5
x6
x1
40-80
60-120
40-80
80-150
20-60
40-120
20-50
40-120
60-90
80-150
40-100
80-150
20-40
20-60
10-20
C
DC
C
C
C
±0.75
+0.25, -0.75
±1.25
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
3.3 V
Both
Both
Both
Both
Both
Both
Both
3.3 V
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
±0.75
±0.75
±0.5
C
DC
DC
C
+0.25, -1.5
+0.5, -1.0
±0.5
C
±0.75
DC
DC
DC
DC
DC
DC
DC
DC
C
D
DC
D
C
DC
C
+0.25, -1.5
+0.25, -1.5
+0.5, -2.0
+0.25, -1.5
+0.5, -2.0
+0.25, -1.5
+0.25, -1.25
+0.25, -1.5
±0.75
10-30
80-150
60-120
10-30
20-30
10-40
60-150
80-150
80-150
40-100
50-100
60-120
20-50
40-100
50-100
60-120
10-30
-0.5
+0.25, -2.25
-0.25, -2.25
±0.75
+0.25, -1.25
±0.75
C
C
C
DC
DC
D
±0.75
±0.75
±0.75
+0.25, -1.5
+0.25, -1.25
-1.5
C
±0.75
For S4:S0, 0 = connect to GND, 1 = connect to VDD.
Direction: C=Center spread, D=Down spread, DC=Down+Center spread.
Amount equals the spread amount. So for a 40 MHz output clock spread down 1%, the lowest
frequency is 39.60 MHz.
Contact ICS with your exact output frequency for details on spread direction and amount.
MDS 1714-02 C
3
Revision 120400
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
MK1714-02
Spread Spectrum Multiplier Clock
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
Referenced to GND
-0.5
0
°C
°C
°C
°C
MK1714-02RI only
Max of 10 seconds
-40
85
Soldering Temperature
Storage temperature
260
-65
150
DC CHARACTERISTICS (VDD = 3.3V or 5V unless noted)
Operating Voltage, VDD
3.0
5.5
VDD/2 - 1
0.8
V
V
Input High Voltage, VIH, X1/ICLK only
Input Low Voltage, VIL, X1/ICLK only
Input High Voltage, VIH
Clock input
VDD/2 + 1
VDD/2
VDD/2
Clock input
V
Select inputs, OE, PD
Select inputs, OE, PD
VDD=3.3V, IOH=-8mA
VDD=3.3V, IOL=8mA
2
V
Input Low Voltage, VIL
V
Output High Voltage, VOH
Output Low Voltage, VOL
2.4
V
0.4
V
Output High Voltage, VOH, VDD = 3.3 or 5V IOH=-8mA
VDD-0.4
V
Operating Supply Current, IDD, at 5V
Operating Supply Current, IDD, at 3.3V
Short Circuit Current, VDD = 3.3
Input Capacitance
No Load, note 2
No Load, note 2
Each output
40
26
mA
mA
mA
pF
kW
±50
7
Except X1, X2
Except X1
Internal Pull-up or Pull-down Resistor
500
AC CHARACTERISTICS (VDD = 3.3V or 5V unless noted)
Input Crystal Frequency
10
10
25
150
1.5
1.5
60
MH z
MH z
ns
Input Clock Frequency
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle
One Sigma Jitter, CLK
Absolute Jitter, CLK
See page 3
0.8 to 2.0V, no load
2.0 to 0.8V, no load
At VDD/2
ns
40
50
40
%
ps
±160
ps
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. Multiplier of x1, all clocks at highest frequencies.
External Components
The MK1714 requires a minimum number of external components for proper operation. Decoupling
capacitors of 0.01µF should be connected between VDD and GND (on pins 4 and 7), as close to the chip
as possible. A series termination resistor of 33 Wmay be used for each clock output. The crystal must be
connected as close to the chip as possible. The crystal should be a fundamental mode and parallel resonant.
If accurate tuning is required, crystal capacitors should be connected from pins X1 to ground and X2 to
ground. The value of these capacitors is given by the following equation, where C is the crystal load
L
capacitance: Crystal caps (pF) = (C -6) x 2. So for a crystal with 20pF load capacitance, two 28 pF caps
L
should be used. If a clock input is used, drive it into X1 and leave X2 unconnected.
MDS 1714-02 C
4
Revision 120400
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
MK1714-02
Spread Spectrum Multiplier Clock
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC Publication No. 95.)
20 pin SSOP
Inches
Symbol Min
Millimeters
Max
Min
Max
A
A1
b
0.053 0.069
0.004 0.010
0.008 0.012
0.007 0.010
0.337 0.344
.025 BSC
1.35
1.75
0.25
0.30
0.25
8.74
0.10
E1
E
0.20
c
0.19
D
e
8.56
0.65 BSC
5.79
INDEX
AREA
E
0.228 0.244
0.150 0.157
0.016 0.050
6.20
3.99
1.27
1
2
E1
L
3.81
0.41
D
A
A1
c
b
L
e
Ordering Information
Part/Order Number
MK1714-02R
Marking
Package
Shipping
Tubes
Temperature
0 to 70 °C
MK1714-02R
MK1714-02R
MK1714-02RI
MK1714-02RI
20 pin SSOP
20 pin SSOP
20 pin SSOP
20 pin SSOP
MK1714-02RTR
MK1714-02RI
Tape and Reel 0 to 70 °C
Tubes -40 to 85 °C
Tape and Reel -40 to 85 °C
MK1714-02RITR
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 1714-02 C
5
Revision 120400
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
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