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PDF ASM3P2107A Data sheet ( Hoja de datos )

Número de pieza ASM3P2107A
Descripción Peak EMI Reducing Solution
Fabricantes ON Semiconductor 
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ASM3P2107A Hoja de datos, Descripción, Manual
ASM3P2107A
Product Preview
Peak EMI Reducing
Solution
Description
The ASM3P2107A is a versatile spread spectrum frequency
modulator designed specifically for input clock frequencies from
12 MHz to 22 MHz. The ASM3P2107A can generate an EMI reduced
clock from crystal, ceramic resonator, or system clock.
The ASM3P2107A reduces electromagnetic interference (EMI) at
the clock source, allowing system wide reduction of EMI of down
stream clock and data dependent signals. The ASM3P2107A allows
significant system cost savings by reducing the number of circuit
board layers ferrite beads, shielding and other passive components that
are traditionally required to pass EMI regulations.
The ASM3P2107A uses the most efficient and optimized
modulation profile approved by the FCC and is implemented in a
proprietary all digital method.
The ASM3P2107A 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.’
Applications
The ASM3P2107A is targeted towards EMI management for high
speed digital applications such as PC peripheral devices, consumer
electronics and embedded controller systems.
Features
FCC Approved Method of EMI Attenuation
Generates a 1X Low EMI Spread Spectrum Clock of the Input
Frequency
Input Frequency Range: 12 MHz to 22 MHz
Internal Loop Filter Minimizes External Components and Board
Space
Frequency Deviation: 0.8% (Typ) @ 20 MHz
Low CycletoCycle Jitter
5.0 V ± 5% Operating Voltage Range
TTL or CMOS Compatible Outputs
Available in 8pin TSSOP and SOIC Package
These are PbFree Devices
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
http://onsemi.com
SOIC8
S SUFFIX
CASE 751BD
TSSOP8
T SUFFIX
CASE 948AL
PIN CONFIGURATION
1
XIN/CLKIN
NC
XOUT
NC
GND
VDD
NC CLOCKOUT
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
August, 2011 Rev. P2
1
Publication Order Number:
ASM3P2107A/D

1 page

ASM3P2107A pdf
PIN # 1
IDENTIFICATION
TOP VIEW
ASM3P2107A
PACKAGE DIMENSIONS
SOIC 8, 150 mils
CASE 751BD01
ISSUE O
E1 E
SYMBOL
A
A1
b
c
D
E
E1
e
h
L
θ
MIN
1.35
0.10
0.33
0.19
4.80
5.80
3.80
0.25
0.40
NOM
1.27 BSC
MAX
1.75
0.25
0.51
0.25
5.00
6.20
4.00
0.50
1.27
D
A1
A
eb
SIDE VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-012.
h
θ
L
END VIEW
c
http://onsemi.com
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