The Fujitsu Spread Spectrum Clock Generator
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.
EMI EMI EMI EMI
EMI EMI
EMI EMI
Shield parts
Capacitor
BUS Ferrite bead,
Choke coil
ASIC
CPU, etc.
Memory
BUS
SSCG
ASIC
CPU, etc.
Memory
Less parts = Less cost
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
XTAL
27.12MHz
RF
3V
TCXO
19.2MHz Buffer
System
LSI
3V
Audio
3V
Level
Shifter
USB
1.8V
XTAL
37MHz
LCD
LCDC
3V
DSP
3V
Video/image
Control
48MHz
RF
3V
TCXO
19.2MHz
System
LSI
3V
Audio
3V
SSCG
USB
1.8V
LCD
LCDC
3V
DSP
3V
Video/image
Control
CLK O/P1 37MHz
CLK O/P2 27.12MHz
CLK O/P4 48MHz
CLK O/P3 19.2MHz
Conventional The Fujitsu SSCG Solution
Reduces BOM cost and PCB area
Features
• 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
• 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
Outputs the
Clock
Frequency
Phase
Comparator
Digital Method
V-I
Conversion
Reference
Clock 1/N
I/M
CP
Digital Control
IDAC ICO
Outputs the
Clock
Frequency
Phase
Comparator
Analog Method
Reference
Clock 1/N
I/M
CP
Analog Modulator
Voltage
Accumulator
VCO
Loop Filter
(Capacity)
The Fujitsu SSCG
Parts Ordering Information
PKG
Output frequency range
40ᇫ
ᇫᇫᇫ
80
ᇫᇫᇫ
120
ᇫ
160
100
101
200
201
400
401
500
501
800
801
101 ᧩ᨺ3.0
111 ᨺ±1.5 ᧩
100 ᧩ᨺ3.0
110 ᨺ±1.5 ᧩
102 ᧩ᨺ3.0
112 ᨺ±1.5 ᧩
100 -1.0
101 -3.0
110 ±0.5
111 ±1.5
103 ᧩ᨺ
3.0
113 ᨺ±1.5 ᧩
102 ᧩ᨺ
3.0
112 ᨺ±1.5 ᧩
101 ᧩ᨺ3.0
111 ᨺ±1.5 ᧩
100 ᧩ᨺ2.0
110 ᨺ±1.0 ᧩
102 ᧩ᨺ2.0
112 ᨺ±1.0 ᧩
101 ᧩ᨺ2.0
111 ᨺ±1.0 ᧩
103 ᧩ᨺ2.0
113 ᨺ±1.0 ᧩
400 ᧩ᨺ2.0
402 ᧩ᨺ2.0
410 ᨺ±1.0 ᧩
412 ᨺ±1.0 ᧩
120 28 8202
214 40 0882
112 28 8221 2.7 3.6
420 42 86108 3.0 3.6
PFT G XXX BND E1 16 32 ᨺ±2.0 ᧩20
TSSOP 3.0 3.6 *7
MB88182
1A
1B
2A
2B
PVA1 G
(*3)/
ER/
EF
E1 19.2 19.2 0018 ᨺ±2.0 ᧩20 BCC 1.65 2.7 *8
10 50 4311 ᨺ±1.75 ᧩8 SOP 3.0 3.6 *9
*1 G: General Purpose use
*2 JN: tray or tube packing , JNEF/EF: Emboss taping(EF type), JNER/ER: Emboss taping(ER type), E1: Lead free
*3 No suffix : tray or tube packing
*4 Use for external clock input
*5 Small package (2.7mm×2.4mm) with clock output stop function
*6 Small package (2.4mm×1.4mm)
*7 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 outputsᇬHi-Z᧥
*9 Input frequency, output frequency, modulation rate, oscillation stabilization capacitance can be set on FRAM without restraint.
Modulation clock out
p
ut
p
in situation is resistor settin
g
᧤
L out
p
uts,Hi-Z
᧥
when in OE
p
in settin
g
Multiplication
ratio
Input
frequency
(
MHz
)
Output frequency (MHz)
Min. max. Min.
Demodulation
rate(%) P/S(V)
Max. Min. Max.Center Down No. of
pins/Type
1
16.6 33.4
2
4
1/2
4.336.61
8.662.33
4314.66
8.3
ᨺ±1.5 ᨺ3.0 8
SOP 3.0 3.6
16.7
88.316.7 4314.66
1
16.6
67
134
40 134
766.61
8
SOP 3.0 3.6
4316.61
43104
116.6134PNF G E1 4316.61 3.0 3.6
᧩8
SOP *4
᧩
1
16.6 40 046.61
8
SOP 3.0 3.6
67
50 80 0805
33 67 33
1
12.5 25
25 50
525.21
8
TSSOP 3.0 3.6
0552
0805
18
BCC
ᨺ±2.0 ᨺ4.0
Product No.
MB88151A
*5
18
BCC
2.7 3.6 *5PVB
PNF
PFT
ORDERING No.
EX: MB881XXPNF-G-100-JNE1
G
Pakage
Suffix
PNF
1EFNP
G
MB88152A
MB88153A
Freq
type
G
Grade
(*1)
MB88154A
MB88155
MB88161
PVBMB88162
Packing and
Option(*2)
EF/
ER
G
G
G
E1
E1
E1
EF/
ER
MB88181A
MB88R157
(FRAM) under development
JN/
JNEF/
JNER
412.520
ᨺ4.0
ᨺ±2.0
*8 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᧥
Remarks
JN
E1
E1
JN/
JNEF/
JNER
JN/
JNEF/
JNER
JN/
JNEF/
JNER
6618
Option-
al
Option-
al
Option-
al
The Fujitsu SSCG
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
© 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
Evaluation Board Evaluate Device
Series Number Product No.
MB88151A MB88151AEB01-100 MB88151A-100
MB88151AEB01-101 MB88151A-101
MB88151AEB01-200 MB88151A-200
MB88151AEB01-201 MB88151A-201
MB88151AEB01-400 MB88151A-400
MB88151AEB01-401 MB88151A-401
MB88151AEB01-500 MB88151A-500
MB88151AEB01-501 MB88151A-501
MB88151AEB01-800 MB88151A-800
MB88151AEB01-801 MB88151A-801
MB88152A MB88152AEB01-100 MB88152A-100
MB88152AEB01-110 MB88152A-110
MB88152AEB01-101 MB88152A-101
MB88152AEB01-111 MB88152A-111
MB88152AEB01-102 MB88152A-102
MB88152AEB01-112 MB88152A-112
MB88153A MB88153AEB01-100 MB88153A-100
MB88153AEB01-101 MB88153A-101
MB88153AEB01-110 MB88153A-110
MB88153AEB01-111 MB88153A-111
MB88154A MB88154AEB01-101 MB88154A-101
MB88154AEB01-102 MB88154A-102
MB88154AEB01-103 MB88154A-103
MB88154AEB01-111 MB88154A-111
MB88154AEB01-112 MB88154A-112
MB88154AEB01-113 MB88154A-113
Evaluation Board Evaluate Device
Series Number Product No.
MB88155 MB88155EB01-100 MB88155-100
MB88155EB01-101 MB88155-101
MB88155EB01-102 MB88155-102
MB88155EB01-103 MB88155-103
MB88155EB01-110 MB88155-110
MB88155EB01-111 MB88155-111
MB88155EB01-112 MB88155-112
MB88155EB01-113 MB88155-113
MB88155EB01-400 MB88155-400
MB88155EB01-402 MB88155-402
MB88155EB01-410 MB88155-410
MB88155EB01-412 MB88155-412
MB88161 MB88161EB01 MB88161
MB88162 MB88162EB01 MB88162
MB88182 MB88182EB01-1A MB881821A
(under development)
MB88182EB01-2A MB881822A
(under development)
MB88182EB01-1B MB881821B
(under development)
MB88182EB01-2B MB881822B
(under development)
MB88R157 MB88R157EB01 MB88R157
(under development)
Evaluation Board Ordering Information
Evaluation Board
Evaluation Board (MB88182EB01)
All listed boards have similar features
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