IC7152MI-01LF [IDT]
Clock Generator;
| 型号： | IC7152MI-01LF |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Clock Generator |
| 文件： | 总10页 (文件大小：96K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATASHEET
SPREAD SPECTRUM CLOCK GENERATOR
ICS7152
Description
Features
The ICS7152-01, -02, -11, and -12 are clock generators for
EMI (Electro Magnetic Interference) reduction (see below
for frequency ranges and multiplier ratios). Spectral peaks
can be attenuated by slightly modulating the oscillation
frequency. Both down and center spread profiles are
selectable. Center spread maintains an average frequency
equal to an unspread clock. Down spread meets maximum
frequency specs over the entire modualtion cycle.
• Operating voltage of 3.3 V 0.3 V
• Packaged in 8-pin SOIC
• Input frequency range of 16.6 to 134.0 MHz
• Output frequency range of 16.6 to 134.0 MHz
• Provides a spread spectrum clock output ( 0.5%, 1.5%
center spread; -1.0%, -3.0% down spread)
• Advanced, low-power CMOS process
• Industrial temperature range available
• Pb (lead) free package, RoHS compliant
Block Diagram
VDD
SEL
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
FREQ
XENS
CKOUT
XIN
Clock Buffer/
Crystal
Ocsillator
XOUT
External caps required with crystal for
accurate tuning of the clock
GND
Product Lineup
Product
Input Frequency Range
Modulation Type
Modulation Enable Pin
ICS7152M-01, ICS7152MI-01
ICS7152M-02, ICS7152MI-02
ICS7152M-11, ICS7152MI-11
ICS7152M-12, ICS7152MI-12
16.6 MHz to 67 MHz
40.0 MHz to 134.0 MHz
16.6 MHz to 67.0 MHz
40.0 MHz to 134.0 MHz
Down spread
Center spread
Yes
IDT® SPREAD SPECTRUM CLOCK GENERATOR
1
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
Pin Assignment
SEL Modulation Rate Setting Table
SEL
Pin 4
(note1)
Spread
Direction
Spread
Percentage (%)
Part Number
8
7
6
5
XENS
XIN
XOUT
GND
SEL
1
2
3
4
FREQ
VDD
0
1
Center
Down
Center
Down
±0.5
-1.0
±1.5
-3.0
ICS7152M-11,
ICS7152M-12
ICS7152M-01,
ICS7152M-02
ICS7152M-11,
ICS7152M-12
ICS7152M-01,
ICS7152M-02
CKOUT
8 pin (150 mil) SOIC
Modulation Enable Setting Table
Frequency Setting Table
XENS
Pin 8
Spread Spectrum
FREQ
Pin 7
Frequency
0
1
ON
0
16.6 to 40 MHz
40 to 80 MHz
33 to 67 MHz
66 to 134 MHz
ICS7152M-01,
ICS7152M-11
ICS7152M-02,
ICS7152M-12
ICS7152M-01,
ICS7152M-11
OFF
1
ICS7152M-02,
ICS7152M-12
Pin Descriptions
Pin
Number
Pin
Name
Pin Type
Pin Description
Crystal resonator connection pin/clock input pin.
1
2
3
4
5
6
7
8
XIN
XOUT
GND
Input
Output Crystal resonator connection pin.
Power Connect to ground.
SEL
Input
Modulation rate setting pin.
CKOUT
VDD
Output Modulated clock output pin.
Power Connect to +3.3 V.
FREQ
XENS
Input
Input
Frequency setting pin.
Modulation enable setting pin.
IDT® SPREAD SPECTRUM CLOCK GENERATOR
2
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
Spread Spectrum Profile
External Components
The ICS7152 low EMI clock generator uses a triangular
frequency modulation profile for optimal down stream
tracking of zero delay buffers and other PLL devices. The
frequency modulation amplitude is constant with variations
of the input frequency.
The ICS7152 requires a minimum number of external
components for proper operation.
Decoupling Capacitor
A decoupling capacitor of 0.01µF must be connected
between GND and VDD on pin 6, as close to this pin as
possible. For optimum device performance, the decoupling
capacitor should be mounted on the component side of the
PCB. Avoid the use of vias in the decoupling circuit.
Modulation Rate
Series Termination Resistor
Series termination should be used on the clock output. To
series terminate a 50Ω trace (a commonly used trace
impedance) place a 27Ωresistor in series with the clock line,
as close to the clock output pin as possible. The nominal
impedance of the clock output is 25Ω.
Time
PCB Layout Recommendations
For optimum device performance and lowest output phase
noise, the following guidelines should be observed.
1) An optimum layout is one with all components on the
same side of the board, minimizing vias through other signal
layers. Other signal traces should be routed away from the
ICS7152. This includes signal traces just underneath the
device, or on layers adjacent to the ground plane layer used
by the device.
Crystal Information
The crystal used should be a fundamental mode, parallel
resonant. Crystal capacitors should be connected from pins
X1 to ground and X2 to ground to optimize the initial
accuracy. The value of these capacitors is given by the
following equation:
Crystal caps (pF) = (C - 6) x 2
L
In the equation, C is the crystal load capacitance. So, for a
L
crystal with a 16 pF load capacitance, two 20 pF [(16-6) x 2]
capacitors should be used.
IDT® SPREAD SPECTRUM CLOCK GENERATOR
3
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS7152. These ratings, which are
standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these
or any other conditions above those indicated in the operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical
parameters are guaranteed only over the recommended operating temperature range.
Item
Rating
Supply Voltage, VDD
7 V
All Inputs and Outputs (referenced to GND)
Ambient Operating Temperature
Storage Temperature
-0.5 V to VDD+0.5 V
-40 to +85° C
-55 to +125° C
-40 to +125° C
260°C
Junction Temperature
Soldering Temperature
Overshoot (V
)
VDD + 1.0 V (t < 50 ns) max
OVER
IOVER
Undershoot (V
)
GND - 1.0 V (t
< 50 ns) min
IUNDER
UNDER
Overshoot/Undershoot
tUNDER < 50 ns
VIOVER < VDD + 1.0 V
VDD
Input pin
GND
VIUNDER < GND - 1.0 V
tOVER < 50 ns
Recommended Operation Conditions
Parameter
Min.
-40
Typ.
Max.
+85
3.6
Units
° C
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
+3.0
3.3
V
IDT® SPREAD SPECTRUM CLOCK GENERATOR
4
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±±.3 V, Ambient Temperature -40 to +85° C
Parameter
Operating Voltage
Supply Current
Symbol
VDD
Conditions
Min.
Typ.
3.3
Max.
3.6
Units
3.0
V
mA
V
IDD
No load, at 3.3 V
14
28
Input High Voltage
V
SEL, FREQ, XENS
VDD x 0.8
VDD x 0.8
VDD + 0.3
VDD + 0.3
IH
XIN, Input slew rate
3 V/ns, 16.6 to 100
MHz
V
XIN, Input slew rate
3 V/ns, 100 to 134
MHz
VDD x 0.9
VDD + 0.3
V
Input Low Voltage
V
SEL, FREQ, XENS
GND
GND
VDD x 0.20
VDD x 0.20
V
V
IL
XIN, Input slew rate
3 V/ns, 16.6 to 100
MHz
XIN, Input slew rate
3 V/ns, 100 to 134
MHz
GND
VDD x 0.10
V
Output High Voltage
Output Low Voltage
Input Capacitance
V
CKOUT, I = -4 mA
VDD - 0.5
GND
VDD
0.4
16
V
V
OH
OH
V
CKOUT, I = 4 mA
OL
OL
C
XIN, SEL, XENS
pF
pF
IN
CKOUT, 16.6 to 67
MHz
15
CKOUT, 67 to 100
MHz
10
7
pF
pF
Ω
Load Capacitance
Output Impedance
C
Z
L
CKOUT, 100 to 134
MHz
CKOUT, 16.6 to 134
MHz
25
O
IDT® SPREAD SPECTRUM CLOCK GENERATOR
5
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±±.3 V, Ambient Temperature -40 to +85° C
Parameter
Input Crystal Frequency
Input Clock Frequency
Symbol
Conditions
Min.
16.6
16.6
40
Typ.
Max. Units
40
67
MHz
MHz
MHz
MHz
f
ICS7152-01, -11
IN
ICS7152-02, -12
134
67
Output Frequency
f
CKOUT,
16.6
OUT
ICS7152-01, -11
CKOUT,
40
134
MHz
ICS7152-02, -12
Input Clock Duty Cycle
t
XIN, 16.6 to 100 MHz
XIN, 100 to 134 MHz
CKOUT, 1.5 V
40
45
40
0.5
50
50
60
55
60
3.0
%
%
DCI
Output Clock Duty Cycle
Output Slew Rate
t
%
DCC
CKOUT, 0.4 to 2.4 V, CL = 15
pF
V/ns
No load, spread off,
ICS7152-01, -02
150
250
120
No load, spread off,
ICS7152-11, -12
Cycle-to-Cycle Jitter
t
ps
JC
No load, spread off,
ICS7152-01, 33.33 MHz,
SEL = 0, FREQ = 1
Power-up Time
PLL lock-time from power-up
to 1% of final value
2
5
ms
Modulation Frequency
f
CKOUT
33
kHz
MOD
IDT® SPREAD SPECTRUM CLOCK GENERATOR
6
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
Input Frequency (fIN = 1/tIN)
tIN
0.8 VDD
XIN
Output Slew Rate
2.4 V
0.4 V
CKOUT
tr
tf
SR = (2.4 - 0.4) /tr, SR = (2.4 - 0.4) /tf
Thermal Characteristics 8 SOIC
Parameter
Symbol
Conditions
Min.
Typ. Max. Units
Thermal Resistance Junction to
Ambient
θ
Still air
150
140
120
40
° C/W
° C/W
° C/W
° C/W
JA
θ
1 m/s air flow
3 m/s air flow
JA
θ
JA
Thermal Resistance Junction to Case
θ
JC
IDT® SPREAD SPECTRUM CLOCK GENERATOR
7
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
Package Outline and Package Dimensions (8-pin SOIC, 15± Mil. Body)
Package dimensions are kept current with JEDEC Publication No. 95
8
Millimeters
Inches
Min Max
Symbol
Min
1.35
0.10
0.33
0.19
4.80
3.80
Max
1.75
0.25
0.51
0.25
5.00
4.00
A
A1
B
C
D
E
e
.0532
.0040
.013
.0688
.0098
.020
E
H
INDEX
AREA
.0075
.1890
.1497
.0098
.1968
.1574
1
2
1.27 BASIC
0.050 BASIC
H
h
L
5.80
0.25
0.40
0°
6.20
0.50
1.27
8°
.2284
.010
.016
0°
.2440
.020
.050
8°
D
α
A
h x 45
A1
C
- C -
e
SEATING
PLANE
B
L
.1± (.±±4)
C
IDT® SPREAD SPECTRUM CLOCK GENERATOR
8
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
Ordering Information
Part / Order Number
7152M-01LF
Marking
52M-01LF
52M-01LF
52MI01LF
52MI01LF
7152M02L
7152M02L
52MI02LF
52MI02LF
7152M11L
7152M11L
52MI11LF
52MI11LF
52M-12LF
52M-12LF
52MI12LF
52MI12LF
Shipping Packaging
Tubes
Package
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
Temperature
0 to +70° C
0 to +70° C
-40 to +85° C
-40 to +85° C
0 to +70° C
0 to +70° C
-40 to +85° C
-40 to +85° C
0 to +70° C
0 to +70° C
-40 to +85° C
-40 to +85° C
0 to +70° C
0 to +70° C
-40 to +85° C
-40 to +85° C
7152M-01LFT
7152MI-01LF
7152MI-01LFT
7152M-02LF
7152M-02LFT
7152MI-02LF
7152MI-02LFT
7152M-11LF
7152M-11LFT
7152MI-11LF
7152MI-11LFT
7152M-12LF
7152M-12LFT
7152MI-12LF
7152MI-12LFT
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
Tubes
Tape and Reel
"LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) 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 IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT
does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.
IDT® SPREAD SPECTRUM CLOCK GENERATOR
9
ICS7152
REV K 062911
ICS7152
SPREAD SPECTRUM CLOCK GENERATOR
SSCG
Innovate with IDT and accelerate your future networks. Contact:
www.IDT.com
For Sales
800-345-7015
408-284-8200
Fax: 408-284-2775
For Tech Support
www.idt.com/go/clockhelp
Corporate Headquarters
Integrated Device Technology, Inc.
www.idt.com
© 2011 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT, ICS, and the IDT logo are trademarks of Integrated
Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or
registered trademarks used to identify products or services of their respective owners.
Printed in USA
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