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ASM3P2779A-TT

Description
Clock Generator, 30MHz, CMOS, PDSO8, TSSOP-8
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size244KB,10 Pages
ManufacturerALSC [Alliance Semiconductor Corporation]
Download Datasheet Parametric Compare View All

ASM3P2779A-TT Overview

Clock Generator, 30MHz, CMOS, PDSO8, TSSOP-8

ASM3P2779A-TT Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
Parts packaging codeSOIC
package instructionTSSOP, TSSOP8,.25
Contacts8
Reach Compliance Codeunknown
ECCN codeEAR99
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.4 mm
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output clock frequency30 MHz
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply3.3 V
Master clock/crystal nominal frequency30 MHz
Certification statusNot Qualified
Maximum seat height1.1 mm
Maximum slew rate4 mA
Maximum supply voltage3.7 V
Minimum supply voltage2.7 V
Nominal supply voltage3.3 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3 mm
uPs/uCs/peripheral integrated circuit typeCLOCK GENERATOR, OTHER
Base Number Matches1
November 2003
rev 2.1
Features
Generates an EMI optimized clocking signal at the output.
Integrated loop filter components.
Operates with a 3.3V ± 10% supply.
Operating current less than 4mA.
Low-power CMOS design.
Input frequency range: 15MHz to 30MHz.
Frequency deviation: ±1%.
Available in 6-pin TSOT-23 and 8-pin SOIC and TSSOP.
Generates a 1X low EMI spread spectrum clock of the
input frequency .
ASM3P2779A
Low Power Peak Reducing EMI Solution
band signal produced by oscillators and most clock generators.
Lowering EMI by increasing a signal’s bandwidth is called
spread spectrum clock generation. The ASM3P2779A uses the
most efficient and optimized modulation profile approved by the
FCC and is implemented by using a proprietary all-digital
method.
Applications
The ASM3P2779A is targeted towards all portable devices with
very low power requirements like MP3 players and digital still
cameras.
Product Description
The ASM3P2779A is a versatile spread spectrum frequency
modulator designed specifically for a wide range of clock
frequencies. The ASM3P2779A reduces electromagnetic
interference (EMI) at the clock source, allowing system wide
reduction of EMI of down stream clock and data dependent
signals. The ASM3P2779A
allows significant system cost
savings by reducing the number of circuit board layers and
shielding that are traditionally required to pass EMI regulations.
The ASM3P2779A modulates the output of a single PLL in
order to “spread” the bandwidth of a synthesized clock, thereby
decreasing the peak amplitudes of its harmonics. This results in
significantly lower system EMI compared to the typical narrow
Key Specifications
Description
Supply voltages
Frequency Range
Cycle-to-Cycle Jitter
Output Duty Cycle
Output rise and fall time
Modulation Rate Equation
Frequency Deviation
Specification
V
DD
= 3.3V ± 10%
15MHz < CLKIN < 30MHz
300 ps (maximum)
40/60% (worst case)
5 ns (maximum)
F
IN
/ 640
±1%
Block Diagram
PD
VDD
XIN
XOUT
Modulation
Crystal
Oscillator
Frequency
Divider
Feedback
Divider
Phase
Detector
Loop
Filter
PLL
VCO
Output
Divider
ModOUT
VSS
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice

ASM3P2779A-TT Related Products

ASM3P2779A-TT ASM3P2779A-SR ASM3P2779A-TR ASM3P2779A-ST ASM3P2779A-OR
Description Clock Generator, 30MHz, CMOS, PDSO8, TSSOP-8 Clock Generator, 30MHz, CMOS, PDSO8, SOIC-8 Clock Generator, 30MHz, CMOS, PDSO8, TSSOP-8 Clock Generator, 30MHz, CMOS, PDSO8, SOIC-8 Clock Generator, 30MHz, CMOS, PDSO6, TSOT-23, 6 PIN
Is it Rohs certified? incompatible incompatible incompatible incompatible incompatible
Parts packaging code SOIC SOIC SOIC SOIC SOT-23
package instruction TSSOP, TSSOP8,.25 SOP, SOP8,.25 TSSOP, TSSOP8,.25 SOP, SOP8,.25 VSSOP, TSOP6,.11,37
Contacts 8 8 8 8 6
Reach Compliance Code unknown unknown unknown unknown unknown
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99
JESD-30 code R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G6
JESD-609 code e0 e0 e0 e0 e0
length 4.4 mm 4.92 mm 4.4 mm 4.92 mm 2.9 mm
Number of terminals 8 8 8 8 6
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C 70 °C
Maximum output clock frequency 30 MHz 30 MHz 30 MHz 30 MHz 30 MHz
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code TSSOP SOP TSSOP SOP VSSOP
Encapsulate equivalent code TSSOP8,.25 SOP8,.25 TSSOP8,.25 SOP8,.25 TSOP6,.11,37
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
power supply 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V
Master clock/crystal nominal frequency 30 MHz 30 MHz 30 MHz 30 MHz 30 MHz
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.1 mm 1.8 mm 1.1 mm 1.8 mm 1 mm
Maximum slew rate 4 mA 4 mA 4 mA 4 mA 4 mA
Maximum supply voltage 3.7 V 3.7 V 3.7 V 3.7 V 3.7 V
Minimum supply voltage 2.7 V 2.7 V 2.7 V 2.7 V 2.7 V
Nominal supply voltage 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V
surface mount YES YES YES YES YES
technology CMOS CMOS CMOS CMOS CMOS
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 0.65 mm 1.27 mm 0.65 mm 1.27 mm 0.95 mm
Terminal location DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 3 mm 3.95 mm 3 mm 3.95 mm 1.6 mm
uPs/uCs/peripheral integrated circuit type CLOCK GENERATOR, OTHER CLOCK GENERATOR, OTHER CLOCK GENERATOR, OTHER CLOCK GENERATOR, OTHER CLOCK GENERATOR, OTHER
Base Number Matches 1 1 1 - -
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