Spansion
®
Analog and Microcontroller
Products
The following document contains information on Spansion analog and microcontroller products. Although the
document is marked with the name “Fujitsu”, the company that originally developed the specification, Spansion
will continue to offer these products to new and existing customers.
Continuity of Specifications
There is no change to this document as a result of offering the device as a Spansion product. Any changes that
have been made are the result of normal document improvements and are noted in the document revision
summary, where supported. Future routine revisions will occur when appropriate, and changes will be noted in a
revision summary.
Continuity of Ordering Part Numbers
Spansion continues to support existing part numbers beginning with “MB”. To order these products, please use
only the Ordering Part Numbers listed in this document.
For More Information
Please contact your local sales office for additional information about Spansion memory, analog, and
microcontroller products and solutions.
FUJITSU MICROELECTRONICS
DATA SHEET
DS04-29127-3E
ASSP
Spread Spectrum Clock Generator
MB88151A
■
DESCRIPTION
MB88151A is a clock generator for EMI (Electro Magnetic Interference) reduction. The peak of unnecessary
radiation noise (EMI) can be attenuated by making the oscillation frequency slightly modulate periodically with
the internal modulator. It corresponds to both of the center spread which modulates frequency in modulation off
as Middle Centered and down spread which modulates so as not to exceed frequency in modulation off.
■
FEATURES
MB88151A-
100/101
(multiply-by-1)
Input
frequency/
Output
frequency
Modulation
clock
cycle-cycle
jitter
MB88151A-
200/201
(multiply-by-2)
MB88151A-
400/401
(multiply-by-4)
MB88151A-
500/501
(multiply-by-1/2)
16.6 MHz to 33.4 MHz/
8.3 MHz to 16.7 MHz
MB88151A-
800/801
(multiply-by-8)
8.3 MHz to 16.7 MHz
66.4 MHz to 133.6 MHz
16.6 MHz to 33.4 MHz/ 16.6 MHz to 33.4 MHz/ 16.6 MHz to 33.4 MHz/
16.6 MHz to 33.4 MHz 33.2 MHz to 66.8 MHz 66.4 MHz to 133.6 MHz
Less than100 ps
Less than 100 ps
Less than 150 ps
Less than 200 ps
Less than 150 ps
•
•
•
•
•
•
•
Modulation rate :
±
0.5%,
±
1.5% (Center spread),
−
1.0%,
−
3.0% (Down spread)
Equipped with oscillation circuit : Range of oscillation 8.3 MHz to 33.4 MHz
Modulation clock output Duty : 40% to 60%
Low current consumption by CMOS process : 5 mA (24 MHz : Typ-sample, no load)
Power supply voltage : 3.3 V
±
0.3 V
Operating temperature :
−
40
°C
to
+
85
°C
Package : SOP 8-pin
Copyright©2007-2009 FUJITSU MICROELECTRONICS LIMITED All rights reserved
2009.6
MB88151A
■
PRODUCT LINEUP
MB88151A has five kinds of multiplication type.
Product
Input frequency range
MB88151A-100/101
MB88151A-200/201
MB88151A-400/401
MB88151A-500/501
MB88151A-800/801
8.3 MHz to 16.7 MHz
16.6 MHz to 33.4 MHz
Multiplier ratio
Multiply-by-1
Multiply-by-2
Multiply-by-4
Multiply-by-1/2
Multiply-by-8
Output frequency range
16.6 MHz to 33.4 MHz
33.2 MHz to 66.8 MHz
66.4 MHz to 133.6 MHz
8.3 MHz to 16.7 MHz
66.4 MHz to 133.6 MHz
■
PIN ASSIGNMENT
TOP VIEW
XIN 1
V
SS
2
MB88151A
SEL0 3
SEL1 4
8 XOUT
7 V
DD
6 ENS/XPD
5 CKOUT
FPT-8P-M02
■
PIN DESCRIPTION
Pin name
XIN
V
SS
SEL0
SEL1
CKOUT
ENS/XPD
V
DD
XOUT
I/O
I
⎯
I
I
O
I
⎯
O
Pin no.
1
2
3
4
5
6
7
8
GND pin
Modulation rate setting pin
Modulation rate setting pin
Modulated clock output pin
Modulation enable setting pin (with pull-up resistance)/
Power down pin (with pull-up resistor)*
Power supply voltage pin
Resonator connection pin
Description
Resonator connection pin/clock input pin
* : XPD
=
800 kΩ pull-up resistor at “L”
2
DS04-29127-3E
MB88151A
■
I/O CIRCUIT TYPE
Pin
SEL0,
SEL1
Circuit type
Remarks
CMOS hysteresis input
ENS
50 kΩ
• With 50 kΩ pull-up resistors
• CMOS hysteresis input
XPD
50 kΩ
800 kΩ
• With 50 kΩ
+
800 kΩ pull-up
resistors
Note : If “L” is input to XPD, 50 kΩ
pull-up resistor is disconnected.
• CMOS hysteresis input
(Continued)
DS04-29127-3E
3
MB88151A
(Continued)
Pin
CKOUT
Circuit type
Remarks
• CMOS output
• I
OL
=
4 mA
Note : For XIN and XOUT pins, refer to “■OSCILLATION CIRCUIT”.
4
DS04-29127-3E