Datenblatt-pdf.com


P2782 Schematic ( PDF Datasheet ) - PulseCore Semiconductor

Teilenummer P2782
Beschreibung General Purpose EMI Reduction IC
Hersteller PulseCore Semiconductor
Logo PulseCore Semiconductor Logo 




Gesamt 11 Seiten
P2782 Datasheet, Funktion
October 2006
rev 1.6
P2781/82/84
General Purpose EMI Reduction IC
Features
Provides up to 15dB of EMI suppression
FCC approved method of EMI attenuation
Generates a 1X, 2X, and 4X low EMI spread
spectrum clock of the input frequency
Input frequency range from 3 to 78MHz
External loop filter for spread % adjustment
Spreading ranges from ±0.25% to ±5.0%
Ultra low cycle-to-cycle jitter
Zero-cycle slip
3.3V operating voltage range
Ultra-low power CMOS design
P278xA is available in 8 pin SOIC and TSSOP
Packages
Available for industrial and automotive
temperature ranges.
reduces electromagnetic interference (EMI) at the clock
source, which provides system wide reduction of EMI of
all clock dependent signals. The P278xA allows
significant system cost savings by reducing the number of
circuit board layers and shielding that are traditionally
required to pass EMI regulations.
The P278xA uses the most efficient and optimized
modulation profile approved by the FCC. The P278xA
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 result 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 P278xA is a versatile spread spectrum frequency
modulator designed specifically for digital camera and
other digital video and imaging applications. The P278xA
The P278xA is targeted towards MFP, xDSL, fax modem,
set-top box, USB controller, DSC, and embedded systems.
Block Diagram
FS0 FS1 LF
VDD
XIN /CLKIN
XOUT
Crystal
Oscillator
www.DataSheet4U.com
Frequency
Divider
Feedback
Divider
Modulation
PLL
Phase
Detector
VCO
Output
Divider
ModOUT
VSS
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.






P2782 Datasheet, Funktion
October 2006
rev 1.6
AC Electrical Characteristics
Symbol
Parameter
fIN Input frequency: P278xA
P2781A
fOUT Output frequency:
P2782A
P2784A
tLH
P278xA
Output rise time (measured at 0.8 V to 2.0 V,
25pF scope probe loading)
tHL
P278xA
Output fall time (measured at 2.0 V to 0.8 V,
25 pF scope probe loading)
tJC
P2781A
Jitter (cycle to cycle, ± 6sigma, 1000 sweeps,
± 0.5% spread, I/O frequency = 16MHz)
tD
P2781A
Output duty cycle deviation (error from 50%
duty cycle, 25pF scope probe loading)
F
P278xA
Frequency deviation tolerance from BW%
stated in the Loop Filter Selection Table
P2781/82/84
Min
Typ
Max
Unit
3 - 78
3 - 78 MHz
6 - 156
12 - 312
- 1 - nS
- 1 - nS
-
±250
-
pS
±1 @ 3MHz
- ±2 @ 82MHz %
-20 0 +20 %
www.DataSheet4U.com
General Purpose EMI Reduction IC
Notice: The information in this document is subject to change without notice.
6 of 11

6 Page







SeitenGesamt 11 Seiten
PDF Download[ P2782 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
P2781General Purpose EMI Reduction ICAlliance Semiconductor
Alliance Semiconductor
P2781MICROPROFILE LINE MATCHING TRANSFORMERETAL
ETAL
P2781General Purpose EMI Reduction ICPulseCore Semiconductor
PulseCore Semiconductor
P2781General Purpose EMI Reduction ICON Semiconductor
ON Semiconductor
P2782General Purpose EMI Reduction ICAlliance Semiconductor
Alliance Semiconductor

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche