The Fujitsu Spread Spectrum Clock Generator
Shield parts
EMI EMI EMI EMI
ASIC CPU, etc.
Capacitor
BUS
Less parts = Less cost
ASIC CPU, etc.
BUS
SSCG
Ferrite bead, Choke coil
Memory
EMI EMI EMI
Memory
EMI
Description
Electromagnetic interference (EMI), which is due to electromagnetic radiation emitted from an external source, is an unwanted disturbance in an electrical circuit. In general, EMI is generated when the clock oscillator outputs a high-frequency signal. To reduce EMI, various components need to be added to the board, increasing the time and resources to complete design and measurement. The Fujitsu Spread Spectrum Clock Generator (SSCG) reduces radiated EMI that results from system clock operation. It minimizes the need for other shielding components like bypass capacitors, choke coil and ferrite bead, resulting in system-level cost savings.
Applications
Industrial/Home Office • FAX • Digital copiers • Scanners • Printers • Projectors Consumer • LCD monitors • HDTVs • PDAs • Mobile phones Networking • Ethernet appliances • LAN switches and hubs • Servers
The Fujitsu SSCG
Features
I/M Analog Modulator Frequency Phase Comparator 1/N CP Voltage Accumulator VCO Loop Filter (Capacity) Outputs the Clock
Reference Clock
Analog Method
I/M
Reference Clock
1/N
Frequency Phase Comparator
CP
V-I Conversion
IDAC
ICO Outputs the Clock
Digital Control
Digital Method
• Digital frequency modulation technique −Digital control using a current D/A converter achieves accurate frequency modulation compared to conventional analog control, which causes distortion and blunting in the modulated waveform • Programmable product (built-in FRAM) −Set and save output frequency and modulation parameters by changing the multiplication / division clock rate • Single input and multiple outputs (Max. 8 Clock outputs, Example: MB88181) −One device supports multiple clocks, thus reducing the need for other components such as oscillators
Conventional
LCD XTAL 27.12MHz LCDC 3V Video/image Control DSP 3V XTAL 37MHz
• Selectable modulation rate −No modulation, ±0.5%, ±1.0%, ±2.0%, -1.0%, -2.0%, -4.0% • Enhanced input frequency range −8.3MHz to 134MHz • Low current consumption −5.5mA @ 25MHz • Power supply voltage range −1.65 V to 3.6 V • Pin compatibility with other products in the market • Package options −SOP8, TSSOP8, BCC6, BCC18, BCC20
The Fujitsu SSCG Solution
Reduces BOM cost and PCB area
CLK O/P1 37MHz
LCD
CLK O/P2 27.12MHz
Video/image Control DSP 3V
LCDC 3V
RF 3V
System LSI 3V
48MHz
Level Shifter
USB 1.8V
RF 3V
System LSI 3V
USB 1.8V
TCXO 19.2MHz
Buffer
Audio 3V
SSCG
CLK O/P3 19.2MHz
Audio 3V
TCXO 19.2MHz
CLK O/P4 48MHz
The Fujitsu SSCG
Parts Ordering Information
ORDERING No. EX: MB881XXPNF-G-100-JNE1
Product No.
Pakage Suffix
Input frequency (MHz)
Multiplication ratio
Output frequency (MHz) Min. 16.6 33.2 Output frequency range
40 80 120 160
Demodulation rate(%) Max. Center 33.4 66.8 134 16.7 134 67 134 134
3.0 ±1.5 3.0 ±1.5 3.0 ±1.5 -1.0 -3.0 ±0.5 ±1.5 3.0 ±1.5 3.0 ±1.5 3.0 ±1.5 2.0 ±1.0 2.0 ±1.0 2.0 ±1.5 3.0 Down
Remarks
PKG
No. of pins/Type
P/S(V)
Min. Max.
Grade (*1)
Freq type
Packing and Option(*2)
Min.
max.
MB88151A
PNF
G
MB88152A
PNF
G
MB88153A
PNF
G
MB88154A
PNF
G
MB88155
PFT
G
100 101 200 201 400 401 500 501 800 801 101 111 100 110 102 112 100 101 110 111 103 113 102 112 101 111 100 110 102 112 101 111 103 113 400 402 410 412
1 2 JN/ JNEF/ JNER 16.6 E1 4 1/2 8 8.3 16.7 67 JN/ JNEF/ JNER 16.6 E1 1 40 JN/ JNEF/ JNER 134 134 33.4
66.4 8.3 66.4 16.6 16.6 40
8 SOP
3.0
3.6
8 SOP
3.0
3.6
E1
1
16.6
134
16.6
134
8 SOP
3.0
3.6
*4
16.6 JN/ JNEF/ JNER E1 1 33 50
40 67 80
16.6 33 50
40 67 80
8 SOP
3.0
3.6
12.5 1 JN E1 25
25
12.5
25
50
25
50
±1.0 2.0 ±1.0 2.0 2.0 ±1.0 ±1.0 ±2.0 ±2.0 4.0 4.0
8 TSSOP
3.0
3.6
4 EF/ ER EF/ ER 1 2 1 4
12.5 20 14 12 20 16
20 28 40 28 42 32
50 20 28 12 80 8
80 28 80 28 168 166
MB88161 MB88162
PVB PVB
G G
E1 E1
18 BCC 18 BCC 20 TSSOP
2.7 2.7 3.0 3.0
3.6 3.6 3.6 3.6
*5 *5
MB88181A 1A 1B 2A 2B MB88R157 (FRAM)
PFT
G
XXX
BND
E1 Optional
±2.0
*7
MB88182
PVA1
G
(*3)/ ER/ EF
E1
Option19.2 al Optional
19.2
8
100
±2.0
20 BCC
1.65
2.7
*8
under development
10
50
1
134
±1.75
8 SOP
3.0
3.6
*9
*1 *2 *3 *4 *5 *6 *7 *8 *9
G: General Purpose use JN: tray or tube packing , JNEF/EF: Emboss taping(EF type), JNER/ER: Emboss taping(ER type), E1: Lead free No suffix : tray or tube packing Use for external clock input Small package (2.7mm×2.4mm) with clock output stop function Small package (2.4mm×1.4mm) Multiplication ratio and output frequency are the MASK option.CLK output has eight pins. The output pin state during power-down is fixed by mask option. L outputs Hi-Z Input frequency, output frequency, modulation rate, oscillation stabilization, capacitance can be set. The output pin state during power-down is fixed by mask option (L outputs,Hi-Z Input frequency, output frequency, modulation rate, oscillation stabilization capacitance can be set on FRAM without restraint. Modulation clock output pin situation is resistor setting L outputs,Hi-Z when in OE pin setting
The Fujitsu SSCG
Evaluation Board Ordering Information
Series
MB88151A
Evaluation Board Number
MB88151AEB01-100 MB88151AEB01-101 MB88151AEB01-200 MB88151AEB01-201 MB88151AEB01-400 MB88151AEB01-401 MB88151AEB01-500 MB88151AEB01-501 MB88151AEB01-800 MB88151AEB01-801
Evaluate Device Product No.
MB88151A-100 MB88151A-101 MB88151A-200 MB88151A-201 MB88151A-400 MB88151A-401 MB88151A-500 MB88151A-501 MB88151A-800 MB88151A-801 MB88152A-100 MB88152A-110 MB88152A-101 MB88152A-111 MB88152A-102 MB88152A-112 MB88153A-100 MB88153A-101 MB88153A-110 MB88153A-111 MB88154A-101 MB88154A-102 MB88154A-103 MB88154A-111 MB88154A-112 MB88154A-113
Series
MB88155
Evaluation Board Number
MB88155EB01-100 MB88155EB01-101 MB88155EB01-102 MB88155EB01-103 MB88155EB01-110 MB88155EB01-111 MB88155EB01-112 MB88155EB01-113 MB88155EB01-400 MB88155EB01-402 MB88155EB01-410 MB88155EB01-412
Evaluate Device Product No.
MB88155-100 MB88155-101 MB88155-102 MB88155-103 MB88155-110 MB88155-111 MB88155-112 MB88155-113 MB88155-400 MB88155-402 MB88155-410 MB88155-412 MB88161 MB88162 MB881821A MB881822A MB881821B MB881822B MB88R157
MB88152A
MB88152AEB01-100 MB88152AEB01-110 MB88152AEB01-101 MB88152AEB01-111 MB88152AEB01-102 MB88152AEB01-112
MB88161 MB88162 MB88182
MB88161EB01 MB88162EB01 MB88182EB01-1A (under development) MB88182EB01-2A (under development) MB88182EB01-1B (under development) MB88182EB01-2B (under development)
MB88153A
MB88153AEB01-100 MB88153AEB01-101 MB88153AEB01-110 MB88153AEB01-111
MB88154A
MB88154AEB01-101 MB88154AEB01-102 MB88154AEB01-103 MB88154AEB01-111 MB88154AEB01-112 MB88154AEB01-113
MB88R157
MB88R157EB01 (under development)
E valuation Board
Evaluation Board (MB88182EB01) All listed boards have similar features
FUJITSU MICROELECTRONICS AMERICA, INC.
Corporate Headquarters 1250 E. Arques Avenue, M/S 333, Sunnyvale, CA 94085-5401 Tel: (800) 866-8608 Fax: (408) 737-5999 E-mail: inquiry@fma.fujitsu.com Web Site: http://us.fujitsu.com/micro
8
© 2010 Fujitsu Microelectronics America, Inc. All company and product names are trademarks or registered trademarks of their respective owners. Printed in the U.S.A. SSCG-FS-21367-04/201_v2
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