ASM3P2274A-06-OR [PULSECORE]
Clock Generator, 120MHz, CMOS, PDSO6, TSOT-23, 6 PIN;
| 型号： | ASM3P2274A-06-OR |
| 厂家： | 
PulseCore Semiconductor |
| 描述： | Clock Generator, 120MHz, CMOS, PDSO6, TSOT-23, 6 PIN 光电二极管 |
| 文件： | 总8页 (文件大小：313K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
November 2005
rev 0.3
ASM3P2274A
Low Power 4X Multiplier EMI Reduction IC
Features
The ASM3P2274A uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all digital method.
Generates a 4X EMI optimized clock signal at the
output.
Integrated loop filter components.
Operates with a 3.3 / 2.5V Supply.
Low power CMOS design.
Input frequency range: 12MHz to 30MHz for 2.5V.
: 12MHz to 30MHz for 3.3V.
Frequency deviation: -1.5% (Typ) @66MHz Output
Frequency.
Available in 6-pin TSOT-23 Package.
The ASM3P2274A modulates the output of a single PLL
in order to “spread” the bandwidth of a synthesized clock,
and more importantly, decreases the peak amplitudes of
its harmonics. This results in significantly lower system
EMI compared to the typical narrow band signal produced
by oscillators and most frequency generators. Lowering
EMI by increasing a signal’s bandwidth is called ‘spread
spectrum clock generation’.
Product Description
Applications
The ASM3P2274 is
a versatile Spread Spectrum
The ASM3P2274A is targeted towards all portable
devices with very low power requirements like MP3
players,MFP, LCD Panel Module and digital still cameras.
Frequency Modulator designed specifically for a wide
range of clock frequencies. It provides a 4x Spread
Spectrum Modulated output from an input clock source.
The ASM3P2274A reduces electromagnetic interference
(EMI) at the clock source, allowing system wide reduction
of EMI of all clock dependent signals. The ASM3P2274A
allows significant system cost savings by reducing the
number of circuit board layers ferrite beads, shielding
that are traditionally required to pass EMI regulations.
Key Specifications
Description
Specification
VDD = 3.3V / 2.5V
Supply voltages
Cycle-to-Cycle Jitter
Output Duty Cycle
360pS (Typ)
45/55%
Modulation Rate Equation
Frequency Deviation
FIN/640
-1.5% (Typ) @ 66MHz Output
Block Diagram
VDD
PD
PLL
Modulation
XIN/CLKIN
XOUT
Crystal
Frequency
Output
Phase
Loop
VCO
Feedback
ModOUT
VSS
Alliance Semiconductor
2575 Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com
Notice: The information in this document is subject to change without notice.
November 2005
ASM3P2274A
rev 0.3
Pin Configuration (6-pin TSOT- 23 Package)
1
2
3
6
5
4
PD
VSS
XOUT
ASM3P2274A
ModOUT
VDD
XIN / CLKIN
Pin Description
Pin# Pin Name Type
Description
Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not
1
2
3
I
O
I
PD
XOUT
used.
Crystal connection. If using an external reference, this pin must be left unconnected.
Crystal connection or external reference frequency input. This pin has dual functions. It
can be connected either to an external crystal or an external reference clock.
XIN / CLKIN
4
5
6
VDD
ModOUT
VSS
P
O
P
Power supply for the entire chip.
Spread spectrum clock output (4X output)
Ground connection.
Modulation Profile
Specifications
Description
Specification
12MHz < CLKIN < 30MHz
12MHz < CLKIN < 30MHz
For 2.5V Supply
For 3.3V Supply
Input Frequency
Range
Modulation Equation
FIN/640
Frequency Deviation
-1.5% (Typ) @ 66MHz Output
Low Power 4X Multiplier EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
ASM3P2274A
rev 0.3
Absolute Maximum Ratings
Symbol
VDD, VIN
TSTG
TA
Parameter
Rating
-0.5 to +7.0
-65 to +125
-40 to +85
260
Unit
V
°C
°C
°C
°C
Voltage on any pin with respect to Ground
Storage temperature
Operating temperature
Max. Soldering Temperature (10 sec)
Junction Temperature
Ts
TJ
150
Static Discharge Voltage
(As per JEDEC STD22- A114-B)
TDV
2
KV
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect
device reliability.
DC Electrical Characteristics for 2.5V Supply
(Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated)
Symbol
VIL
Parameter
Min
VSS - 0.3
Typ
–
–
–
–
3
3
–
–
Max
0.8
VDD + 0.3
Unit
V
V
µA
µA
mA
mA
V
Input low voltage
Input high voltage
Input low current
Input high current
VIH
IIL
IIH
2.0
–
–
–
-35
35
–
–
0.6
–
10
–
2.625
5
IXOL
IXOH
VOL
VOH
IDD
ICC
VDD
tON
XOUT output low current (@0.5V, VDD=2.5V)
XOUT output high current (@1.8V, VDD=2.5V)
Output low voltage (VDD = 2.5V, IOL = 8 mA)
Output high voltage (VDD = 2.5V, IOH = 8 mA)
Static supply current*
Dynamic supply current (2.5V, 66MHz and no load)
Operating voltage
Power-up time (first locked cycle after power-up)**
Output impedance
–
–
1.8
–
V
–
uA
mA
V
mS
Ω
–
3.0
2.5
–
2.375
–
–
ZOUT
50
–
* XIN /CLKIN pin and PD pin are pulled low
** VDD and XIN/CLKIN input are stable, PD pin is made high from low.
AC Electrical Characteristics for 2.5V Supply
Symbol
CLKIN
Parameter
Min
12
Typ
–
Max
30
Unit
MHz
MHz
Input frequency
ModOUT
fd
Output frequency
48
–
–
–
-1.6
-1.4
120
–
–
Output Frequency = 48MHz
Output Frequency = 120MHz
Frequency Deviation
%
tLH*
tHL*
tJC
Output rise time (measured from 0.7V to 1.7V)
Output fall time (measured from 1.7V to 0.7V)
Jitter (Cycle to cycle)
0.5
0.4
–
2.0
1.0
360
50
2.3
1.2
–
nS
nS
pS
%
tD
Output duty cycle
40
60
* tLH and tHL are measured into a capacitive load of 15pF
Low Power 4X Multiplier EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
rev 0.3
ASM3P2274A
DC Electrical Characteristics for 3.3V Supply
(Test condition: All parameters are measured at room temperature (+ 25°C) unless otherwise stated)
Symbol
VIL
Parameter
Min
VSS - 0.3
Typ
–
–
–
–
3
3
–
–
Max
0.8
VDD + 0.3
Unit
V
V
µA
µA
mA
mA
V
Input low voltage
Input high voltage
Input low current
Input high current
VIH
IIL
IIH
2.0
–
–
–
–
–
2.5
–
–
3.0
–
-35
35
–
–
0.4
–
10
–
3.6
5
IXOL
IXOH
VOL
VOH
IDD
ICC
VDD
tON
XOUT output low current (@0.4V, VDD=3.3V)
XOUT output high current (@2.5V, VDD=3.3V)
Output low voltage (VDD = 3.3V, IOL = 8 mA)
Output high voltage (VDD = 3.3V, IOH = 8 mA)
Static supply current*
Dynamic supply current (3.3V, 66MHz and no load)
Operating voltage
Power-up time (first locked cycle after power-up)**
Output impedance
V
–
uA
mA
V
mS
Ω
4.0
3.3
–
ZOUT
–
45
–
* XIN /CLKIN pin and PD pin are pulled low
** VDD and XIN/CLKIN input are stable, PD pin is made high from low.
AC Electrical Characteristics for 3.3V Supply
Symbol
CLKIN
Parameter
Min
12
Typ
–
Max
30
Unit
MHz
MHz
Input frequency
ModOUT
Output frequency
48
–
120
Output Frequency = 48MHz
Output Frequency = 120MHz
–
–
-1.6
-1.4
–
–
fd
Frequency Deviation
%
tLH*
Output rise time (measured from 0.8 to 2.0V)
Output fall time (measured at 2.0V to 0.8V)
Jitter (Cycle to cycle)
0.4
0.4
–
1.3
0.8
360
50
1.6
1.1
–
nS
nS
pS
%
tHL
tJC
tD
*
Output duty cycle
40
60
*tLH and tHL are measured into a capacitive load of 15pF
Low Power 4X Multiplier EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
ASM3P2274A
rev 0.3
Typical Crystal Oscillator Circuit
200KΩ
R1 = 510Ω
Crystal
C1 = 27 pF
C2 = 27 pF
Typical Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal frequency
Frequency tolerance
Operating temperature range
Storage temperature
Load capacitance
14.31818 MHz
± 50 ppm or better at 25°C
-25°C to +85°C
-40°C to +85°C
18pF
Shunt capacitance
ESR
7pF maximum
25 Ω
Low Power 4X Multiplier EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
ASM3P2274A
rev 0.3
Package Information
6-pin TSOT-23 Package
Dimensions
Millimeters
Symbol
Inches
Min
Max
Min
Max
A
A1
A2
b
0.04
1.00
0.10
0.90
0.50
0.00
0.033
0.012
0.004
0.036
0.02
0.00
0.84
0.30
H
D
B
0.005 BSC
0.114 BSC
0.06 BSC
0.127 BSC
2.90 BSC
1.60 BSC
0.950 BSC
2.80 BSC
e
0.0374 BSC
0.11 BSC
C
L
0.0118
0°
0.02
4°
0.30
0°
0.50
4°
θ
Low Power 4X Multiplier EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
November 2005
ASM3P2274A
rev 0.3
Ordering Information
Part Number
ASM3P2274AF-06-OR
ASM3P2274A-06-OR
ASM3P2274AG-06-OR
ASM3I2274AF-06-OR
ASM3I2274A-06-OR
ASM3I2274AG-06-OR
Marking
Package Type
6-Pin TSOT-23, TAPE & REEL, Pb Free
6-Pin TSOT-23, TAPE & REEL
6-Pin TSOT-23, TAPE & REEL, Green
6-Pin TSOT-23, TAPE & REEL, Pb Free
6-Pin TSOT-23, TAPE & REEL
Temperature
Z4
Z1
Z3
Z5
Z2
Z6
Commercial
Commercial
Commercial
Industrial
Industrial
Industrial
6-Pin TSOT-23, TAPE & REEL, Green
Device Ordering Information
A S M 3 P 2 2 7 4 A F - 0 6 - 0 R
R = Tape & reel, T = Tube or Tray
O = SOT
U = MSOP
E = TQFP
S = SOIC
T = TSSOP
A = SSOP
V = TVSOP
B = BGA
L = LQFP
U = MSOP
P = PDIP
D = QSOP
X = SC-70
Q = QFN
DEVICE PIN COUNT
F = LEAD FREE AND RoHS COMPLIANT PART
G = GREEN PACKAGE
PART NUMBER
X= Automotive
I= Industrial
P or n/c = Commercial
(0C to +70C)
(-40C to +125C) (-40C to +85C)
1 = Reserved
6 = Power Management
7 = Power Management
8 = Power Management
9 = Hi Performance
2 = Non PLL based
3 = EMI Reduction
4 = DDR support products
ALLIANCE SEMICONDUCTOR MIXED SIGNAL PRODUCT
Licensed under U.S Patent Nos 5,488,627 and 5,631,921
Low Power 4X Multiplier EMI Reduction IC
7 of 8
Notice: The information in this document is subject to change without notice.
November 2005
rev 0.3
ASM3P2274A
Copyright © Alliance Semiconductor
Alliance Semiconductor Corporation
2575 Augustine Drive,
Santa Clara, CA 95054
Tel# 408-855-4900
All Rights Reserved
Preliminary Information
Part Number: ASM3P2274A
Document Version: v0.3
Fax: 408-855-4999
www.alsc.com
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003
© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are
trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective
companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance
assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's
best data and/or estimates at the time of issuance. Alliance reserves the right to change or correct this data at any time,
without notice. If the product described herein is under development, significant changes to these specifications are possible.
The information in this product data sheet is intended to be general descriptive information for potential customers and users,
and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. Alliance does not assume
any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or
implied warranties related to the sale and/or use of Alliance products including liability or warranties related to fitness for a
particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in Alliance's
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claims arising from such use.
Low Power 4X Multiplier EMI Reduction IC
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Notice: The information in this document is subject to change without notice.
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