pi6c3622 Pericom Semiconductor Corporation, pi6c3622 Datasheet

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pi6c3622

Manufacturer Part Number
pi6c3622
Description
Low Power Spread Spectrum Frequency Multiplier
Manufacturer
Pericom Semiconductor Corporation
Datasheet
Features
• 20 to 40MHz input frequency range
• 1x frequency multiplication
• Operating voltages of 2.5 V or 3.3V
• Selectable Spreading Ratio : ±0.25%, ±0.50%, ±0.70%, ±1.0%
• Modulation Rate: Fin /640(20 MHz≤ Fin ≤40 MHz)
• Spread Spectrum feature can be enabled/disabled at run-time
• Low power dissipation
• Low jitter
• 8-pin TSSOP Package
Applications
The PI6C3622 can be used in most multimedia applications and
embedded systems including but not limited to the following:
Block Diagram
and 0% typical at 27MHz input
and glitch-free
PDAs
DSCs
Printers/ MFPs
Media players
Portable-TVs
Embedded digital video devices
CD-ROM, VCD and DVD players
LCD Panel Modules
Automotive components
Networking devices
X1/CLKIN
X2
OSC
X’TAL
1/M
S1
S0
PFD
/CP
Modulation
LPF
1/N
SSON
VCO
CLKOUT
1/K
Low Power Spread Spectrum Frequency Multiplier
1
Description
The PI6C3622 is a Low Power Spread Spectrum Frequency
Multiplier and part of the Pericom SSCG-GP family. The part
generates one 1x modulated output from a single clock source or
a crystal, and is designed to reduce electromagnetic interference
(EMI) by spreading the clock. This reduction in EMI can result
in signifi cant system cost saving and less design complexity
by reducing the number of circuit board layers ferrite beads
and shielding. In the absence of a spread spectrum clock, other
EMI-reducing components are required in order to comply with
regulatory agency requirements.
The Spreading Ratio is selectable using the selection pins. The
PI6C3622 provides ±0.25%, ±0.50%, ±0.70%, ±1.0% diversifi ed
and 0% spread modulation through external logic stage setting.
The Spread Spectrum feature can be enabled and disabled at run-
time by setting the SSON pin. Other pins should be properly set
before the system is initialized.
The chip is packaged in the 8-pin TSSOP. The reduced size of
the package outlines can save precious board space and make
layout easier.
PI6C3622 is one of the clock products provided by Pericom.
If your application needs a clock product with a different
specifi cation not currently provided, please contact us for further
information or custom design.
Benefi ts
Pin Confi guration
Reduction in EMI
System cost saving
Reduced system complexity
Faster time to market
/CLKIN
SSON
X1
GND
S1
8 Pin
TSSOP
SSCG-GP Family
PS8939A
X2
VDD
S0
CLKOUT
PI6C3622
01/29/08

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pi6c3622 Summary of contents

Page 1

... The chip is packaged in the 8-pin TSSOP. The reduced size of the package outlines can save precious board space and make layout easier. PI6C3622 is one of the clock products provided by Pericom. If your application needs a clock product with a different specifi cation not currently provided, please contact us for further information or custom design. Benefi ...

Page 2

... SSCG-GP Family Description S1,S0 = 0/1 Modulation Rate SSON=1 SSON=0 Center No Spread ±1.20 0 ±1.10 0 ±1.00 0 ±0.90 0 ±0.85 0 ±0.80 0 PS8939A PI6C3622 (KHz) 31.25~62.5 F /640 in F /640 in F /640 in F /640 in F /640 in F /640 in 01/29/08 ...

Page 3

... Figure 1. Frequency trend of the output signal when SSON is switched on and then off Low Power Spread Spectrum Frequency Multiplier 3 PI6C3622 SSCG-GP Family PS8939A 01/29/08 ...

Page 4

... Figure 2. Frequency trend of the output signal when SSON is switched off Figure 3. Frequency trend of the output signal when SSON is switched off Low Power Spread Spectrum Frequency Multiplier 4 PI6C3622 SSCG-GP Family PS8939A 01/29/08 ...

Page 5

... Measured from 20% to – 2.1 80 15pF load. DD Measured from 80% to – 1.9 20 15pF load DD – 200 – 600 PI6C3622 SSCG-GP Family Max Unit 2.625 V – V 0.8 V – V 0.6 V 3.6 mA – Ω – Ω – pF Max Unit 40 MHz 40 ...

Page 6

... Measured from 20% to – 1.7 80 15pF load. DD Measured from 80% to – 1.7 20 15pF load DD – 180 – 600 PI6C3622 SSCG-GP Family Typ. Max Unit 3.3 3.6 V – – V – 0.8 V – – V – 0.5 V – 5 – Ω 45 – ...

Page 7

... Ci). The typical CLtrim = 28pF when crystal load = 18pF, stray capacitance Cs = 3pF and XTAL pins capacitance = 5pF. Low Power Spread Spectrum Frequency Multiplier 0.1uF 1nF Strapping to low Crystal Ltrim 7 PI6C3622 SSCG-GP Family VDD VDD S0,S1, Strapping to high SSON C Ltrim PS8939A 01/29/08 ...

Page 8

... Low Power Spread Spectrum Frequency Multiplier Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2335 DESCRIPTION: 8-Pin, 173-Mil Wide, TSSOP PACKAGE CODE: L Package Code L 8 PI6C3622 SSCG-GP Family DOCUMENT CONTROL NO 1308 REVISION: E DATE: 11/15/05 • www.pericom.com Package Description Pb-Free & Green, 8-Pin TSSOP ...

Page 9

... The inclusion of PSC products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifi es PSC against all charges. Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com Low Power Spread Spectrum Frequency Multiplier 9 PI6C3622 SSCG-GP Family PS8939A 01/29/08 ...

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