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P2041A Datasheet

Versatile EMI Reduction IC

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P2041A
Versatile EMI Reduction IC
Description
The P2041A is a selectable spread spectrum frequency modulator
designed specifically for PC peripheral and embedded controller
markets. The P2041A reduces electromagnetic interference (EMI) at
the clock source which provides system wide reduction of EMI of all
clock dependent signals. The P2041A allows significant system cost
savings by reducing the number of circuit board layers and shielding
that are traditionally required to pass EMI regulations.
The P2041A uses the most efficient and optimized modulation
profile approved by the FCC and is implemented in a proprietary
alldigital method.
The P2041A 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 P2041A is targeted towards the embedded controller market
and PC peripheral markets including scanners, MFP’s, printers, PDA,
IA, and GPS devices.
Features
FCC Approved Method of EMI Attenuation
Provides up to 20 dB of EMI Suppression
Generates a Low EMI Spread Spectrum Clock of the Input
Frequency
Optimized for 25 MHz to 60 MHz Input Frequency Range
Internal Loop Filter Minimizes External Components and Board
Space
4 Selectable Spread Ranges
SSON Control Pin for Spread Spectrum Enable and Disable Options
Low CycletoCycle Jitter
3.3 V or 5.0 V Operating Voltage
Low Power CMOS Design
Available in 8pin SOIC and TSSOP Packages
These are PbFree Devices
http://onsemi.com
SOIC8
S SUFFIX
CASE 751BD
TSSOP8
T SUFFIX
CASE 948AL
PIN CONFIGURATION
1
XIN / CLK
VDD
XOUT
SR1
P2041A
SR0
ModOUT
VSS
SSON
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
August, 2011 Rev. 2
1
Publication Order Number:
P2041A/D


  ON Semiconductor Electronic Components Datasheet  

P2041A Datasheet

Versatile EMI Reduction IC

No Preview Available !

XIN
XOUT
Crystal
Oscillator
P2041A
SR0 SR1 SSON VDD
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
PLL
VCO
Output
Divider
ModOUT
VSS
Figure 1. Block Diagram
Table 1. ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Rating
Unit
VDD, VIN
Voltage on any pin with respect to Ground
0.5 to +7.0
V
TSTG
Storage temperature
65 to +125
°C
TA Operating temperature
40 to +85
°C
Ts Max. Soldering Temperature (10 sec)
260 °C
TJ Junction Temperature
150 °C
TDV Static Discharge Voltage (As per JEDEC STD22A114B)
2 KV
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. PIN DESCRIPTION
Pin#
Pin Name
Type
1 XIN / CLK I
2 XOUT I
3 SR1 I
4 VSS P
5 SSON I
6 ModOUT O
7 SR0 I
8 VDD P
Description
Connect to crystal or externally generated clock signal.
Connect to crystal. No connect if externally generated clock signal is used.
Digital logic input used to select Spreading Range (see Table 3).
This pin has an internal pullup resistor.
Ground Connection. Connect to system ground.
Digital logic input used to enable Spread Spectrum function (Active Low).
Spread Spectrum function enable when low. This pin has an internal pulllow resistor.
Spread Spectrum Clock Output.
Digital logic input used to select Spreading Range (see Table 3).
This pin has an internal pullup resistor.
Connect to +3.3 V or +5.0 V.
http://onsemi.com
2


Part Number P2041A
Description Versatile EMI Reduction IC
Maker ON Semiconductor
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