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FUJITSU SEMICONDUCTOR DATA SHEET
DS04-29115-2E
Spread Spectrum Clock Generator
MB88154
DESCRIPTION
MB88154 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 input frequency as Middle Centered and down spread which modulates so as not to exceed input frequency.
FEATURE
* Input frequency : 16.6 MHz to 67 MHz * Output frequency: 16.6 MHz to 67 MHz (One time input frequency) * Modulation rate can select from 0.5%, 1.0%, 1.5% or - 1.0%, - 2.0%, - 3.0%. (For center spread / down spread.) * Equipped with crystal oscillation circuit: Range of oscillation 16.6 M MHz to 48 MHz * The external clock can be input: 16.6 MHz to 67 MHz * Modulation clock output Duty : 40% to 60% * Modulation clock Cycle-Cycle Jitter : Less than 100 ps * Low current consumption by CMOS process : 5.0 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
PACKAGE
8-pin plastic SOP
(FPT-8P-M02)
MB88154
PRODUCT LINEUP
MB88154 has two kinds of input frequency, and two kinds of modulation type (center/down spread), total four lineups. Product Input/Output frequency Modulation type MB88154-102 MB88154-103 MB88154-112 MB88154-113 33 MHz to 67 MHz 16.6 MHz to 40 MHz 33 MHz to 67 MHz 16.6 MHz to 40 MHz Down Center
PIN ASSIGNMENT
TOP VIEW
CKOUT 1 VDD 2 MB88154 VSS 3 XIN 4
8 SEL1 7 REFOUT 6 SEL0 5 XOUT
FPT-8P-M02
PIN DESCRIPTION
Pin name CKOUT VDD VSS XIN XOUT SEL0 REFOUT SEL1 I/O O I O I O I Pin no. 1 2 3 4 5 6 7 8 Modulated clock output pin Power supply voltage pin GND pin Crystal resonator connection pin/clock input pin Crystal resonator connection pin Modulation rate setting pin Non-modulated clock output pin Modulation rate setting pin Description
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MB88154
I/O CIRCUIT TYPE
Pin Circuit type Remarks * CMOS hysteresis input
SEL0 SEL1
* CMOS output * IOL = 3 mA
CKOUT REFOUT
Note : For XIN and XOUT pins, see "OSCILLATION CIRCUIT"
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MB88154
HANDLING DEVICES
Preventing Latchup A latchup can occur if, on this device, (a) a voltage higher than VDD or a voltage lower than VSS is applied to an input or output pin or (b) a voltage higher than the rating is applied between VDD and VSS. The latchup, if it occurs, significantly increases the power supply current and may cause thermal destruction of an element. When you use this device, be very careful not to exceed the maximum rating. Handling unused pins Do not leave an unused input pin open, since it may cause a malfunction. Handle by, using a pull-up or pull-down resistor. Unused output pin should be opened. The attention when the external clock is used Input the clock to XIN pin, and XOUT pin should be opened when you use the external clock. Please pay attention so that an overshoot and an undershoot do not occur to an input clock of XIN pin. Power supply pins Please design connecting the power supply pin of this device by as low impedance as possible from the current supply source. We recommend connecting electrolytic capacitor (about 10 F) and the ceramic capacitor (about 0.01 F) in parallel between VSS and VDD near the device, as a bypass capacitor. Oscillation circuit Noise near the XIN and XOUT pins may cause the device to malfunction. Design printed circuit boards so that electric wiring of XIN or XOUT pin and the resonator do not intersect other wiring. Design the printed circuit board that surrounds the XIN and XOUT pins with ground.
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MB88154
BLOCK DIAGRAM
VDD
SEL1
Modulation rate setting PLL block Reference clock
CKOUT
Clock output
SEL0
XOUT
Reference clock output
XIN REFOUT Rf = 1 M
VSS
1 - M
Phase compare Charge pump V/I conversion
IDAC
ICO
Modulation
Reference clock
1 - N
Loop filter
Clock output
1 - L
Modulation logic
Modulation rate setting Modulation enable setting
MB88154 PLL block A glitchless IDAC (current output D/A converter) provides precise modulation, thereby dramatically reducing EMI. 5
MB88154
PIN SETTING
SEL 0, SEL 1 Modulation rate setting modulation rate SEL1 L L H H Notes : SEL0 L H L H MB88154-102, MB88154-103 Down spread - 1.0% - 2.0% - 3.0% No spread MB88154-112, MB88154-113 Center spread 0.5% 1.0% 1.5% No spread
* The modulation rate can be changed at the level of the pin. Spectrum does not spread when "H" level is set to SEL0 and SEL1 pin. The clock with low jitter can be obtained. * When changing the modulation rate setting, the stabilization wait time for the modulation clock is required. The stabilization wait time for the modulation clock take the maximum value of " ELECTRICAL CHARACTERISTICS * AC Characteristics Lock-Up time".
* Center spread Spectrum is spread (modulated) by centering on the input frequency. Modulation width 3.0% Radiation level
-1.5%
+1.5%
Frequency Input frequency Modulation rate center spread example of 1.5% * Down spread Spectrum is spread (modulated) below the input frequency. Modulation width 3.0% Radiation level
-3.0%
Frequency Frequency in modulation off Modulation width down spread example of - 3.0% 6
MB88154
ABSOLUTE MAXIMUM RATINGS
Parameter Power supply voltage* Input voltage* Output voltage* Storage temperature Operation junction temperature Output current Overshoot Undershoot Symbol VDD VI VO TST TJ IO VIOVER VIUNDER Rating Min - 0.5 VSS - 0.5 VSS - 0.5 - 55 - 40 - 14 VSS - 1.0 (tUNDER 50 ns) Max + 4.0 VDD + 0.5 VDD + 0.5 + 125 + 125 + 14 VDD + 1.0 (tOVER 50 ns) Unit V V V C C mA V V
* : The parameter is based on VSS = 0.0 V. WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
Overshoot/Undershoot
tUNDER 50 ns VIOVER VDD + 1.0 V
VDD
Input pin
VSS
tOVER 50 ns
VIUNDER VSS - 1.0 V
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MB88154
RECOMMENDED OPERATING CONDITIONS
(VSS = 0.0 V) Parameter Power supply voltage "H" level input voltage "L" level input voltage Input clock duty cycle Operating temperature Symbol VDD VIH VIL tDCI Ta Pin VDD XIN, SEL0, SEL1 XIN Conditions 16.6 MHz to 67 MHz Value Min 3.0 VDD x 0.80 VSS 40 - 40 Typ 3.3 50 Max 3.6 VDD + 0.3 VDD x 0.20 60 + 85 Unit V V V % C
WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device's electrical characteristics are warranted when the device is operated within these ranges. Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand.
Input clock duty cycle (tDCI = tb/ta)
ta tb XIN 1.5 V
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MB88154
ELECTRICAL CHARACTERISTICS
* DC Characteristics (Ta = -40 C to + 85 C, VDD = 3.3 V 0.3 V, VSS = 0.0 V) Parameter Power supply current Symbol ICC VOH Output voltage VOL Output impedance ZO Pin VDD Conditions no load capacitance at 24 MHz output "H" level output IOH = - 3 mA "L" level output IOL = 3 mA 16.6 MHz to 67 MHz Ta = + 25 C, VDD = VI = 0.0 V, f = 1 MHz Value Min VDD - 0.5 VSS Typ 5.0 70 Max 7.0 VDD 0.4 16 Unit mA V V pF
CKOUT, REFOUT CKOUT, REFOUT XIN, SEL0, SEL1
Input capacitance
CIN
* AC Characteristics (Ta = -40 C to + 85 C, VDD = 3.3 V 0.3 V, VSS = 0.0 V) Parameter Oscillation frequency Input frequency Output frequency Output slew rate Output clock duty cycle Modulation frequency Lock-Up time Symbol fx fin fOUT SR tDCC tDCR fMOD tLK Pin XIN, XOUT XIN CKOUT, REFOUT Conditions Fundamental oscillation 3rd over-tone oscillation MB88154-103/113 MB88154-102/112 MB88154-103/113 MB88154-102/112 Value Min 16.6 40 16.6 33 16.6 33 0.3 40 tDCI - 10* Typ 12.5 2 Max 40 48 40 67 40 67 2.0 60 tDCI + 10* 5 Unit MHz MHz MHz V/ns % % kHz ms
CKOUT, 0.4 V to 2.4 V REFOUT load capacitance 15 pF CKOUT REFOUT CKOUT CKOUT 1.5 V 1.5 V No load capacitance, Ta = +25 C, VDD = 3.3 V, Standard deviation
Cycle-cycle jitter
tJC
CKOUT
100
ps
* : Duty of the REFOUT output is guaranteed only for the following A and B because it depends on tDCI of input clock duty. A. Resonator : When resonator is connected with XIN and XOUT and oscillates normally. B. External clock input : The input level is Full - swing (VSS - VDD).
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MB88154
OUTPUT CLOCK DUTY CYCLE (tDCC, tDCR = tb/ta)
ta tb 1.5 V CKOUT, REFOUT
INPUT FREQUENCY (fin = 1/tin)
tin
0.8 VDD XIN
OUTPUT SLEW RATE (SR)
2.4 V CKOUT, REFOUT 0.4 V tr tf
Note : SR = (2.4-0.4) /tr, SR = (2.4-0.4) /tf
CYCLE-CYCLE JITTER (tJC = | tn - tn + 1 |)
CKOUT tn tn+1
Note : Cycle-cycle jitter is defined the difference between a certain cycle and immediately after (or, immediately before) .
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MB88154
MODULATION WAVEFORM
* 1.5% modulation rate, Example of center spread CKOUT output frequency
+ 1.5 %
Frequency at modulation OFF Time
- 1.5 %
fMOD = 12.5 kHz (Typ)
* -1.0% modulation rate, Example of down spread CKOUT output frequency Frequency at modulation OFF Time
- 0.5 %
- 1.0 %
fMOD = 12.5 kHz (Typ)
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MB88154
LOCK-UP TIME
3.0 V
Internal clock stabilization wait time
VDD
XIN
Setting pin
SEL0, SEL1 CKOUT
VIH
tLK (lock-up time )
If the setting pin is fixed at the "H" or "L" level, the maximum time after the power is turned on until the set clock signal is output from CKOUT pin is (the stabilization wait time of input clock to XIN pin) + (the lock-up time "tLK"). For the input clock stabilization time, check the characteristics of the resonator or oscillator used. Note : When the pin setting is changed, the CKOUT pin output clock stabilization time is required. Until the output clock signal becomes stable, the output frequency, output clock duty cycle, modulation period, and cyclecycle jitter cannot be guaranteed. It is therefore advisable to perform processing such as cancelling a reset of the device at the succeeding stage after the lock-up time.
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MB88154
OSCILLATION CIRCUIT
The left side of figures below shows the connection example about general resonator. The oscillation circuit has the built-in feedback resistance (1 M) . The value of capacity (C1 and C2) is required adjusting to the most suitable value of an individual resonator. The right side of figures below shows the example of connecting for the 3rd over-tone resonator. The value of capacity (C1, C2 and C3) and inductance (L1) is needed adjusting to the most suitable value of an individual resonator. The most suitable value is different by individual resonator. Please refer to the resonator manufacturer which use for the most suitable value. When an external clock is used (the resonator is not used) , input the clock to XIN pin and do not connect anything with XOUT. * When using a resonator
Internal LSI
Rf (1 M) Rf (1 M)
XIN Pin
XOUT Pin
XIN Pin
XOUT Pin
External LSI
L1 C1 C2 C1 C2 C3
Normal resonator
3rd over-tone resonator
* When using an external clock
LSI Internal
Rf (1 M)
XIN Pin
XOUT Pin
LSI External External clock
OPEN
Note :
Note that a jitter characteristic of an input clock may cause an affect a cycle-cycle jitter characteristic.
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MB88154
INTERCONNECTION CIRCUIT EXAMPLE
R2 1 2 MB88154 + C3 C4 3 4 6 8 7
SEL1
R1 SEL0 5 ENS
Xtal C1 C2
C1, C2 C3 C4 R1, R2
: Oscillation stabilization capacitance (see "OSCILLATION CIRCUIT".) : Capacitor of 10 F or higher : Capacitor about 0.01 F (connect a capacitor of good high frequency property (ex. laminated ceramic capacitor) to close to this device.) : Impedance matching resistor for board pattern
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MB88154
EXAMPLE CHARACTERISTICS
The condition of the examples of the characteristic is shown as follows: Input frequency = 20 MHz (Output frequency = 20 MHz : Using MB88154-113), Power - supply voltage = 3.3 V, None load capacity. Modulation rate = 1.5% (center spread) Spectrum analyzer HP4396B is connected with CKOUT. The result of the measurement with RBW = 1 kHz (ATT use for - 6dB).
CH B Spectrum
10 dB /REF 0 dBm
No modulation -6.18 dBm
Avg 4
modulation 1.5 % -26.03 dBm
RBW# 1 kHZ VBW 1 kHZ CENTER 20 MHZ
ATT 6 dB
SWP 2.505 s SPAN 4 MHZ
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MB88154
ORDERING INFORMATION
Part number MB88154PNF-G-102-JNE1 MB88154PNF-G-103-JNE1 MB88154PNF-G-112-JNE1 MB88154PNF-G-113-JNE1 MB88154PNF-G-102-JN-EFE1 MB88154PNF-G-103-JN-EFE1 MB88154PNF-G-112-JN-EFE1 MB88154PNF-G-113-JN-EFE1 MB88154PNF-G-102-JN-ERE1 MB88154PNF-G-103-JN-ERE1 MB88154PNF-G-112-JN-ERE1 MB88154PNF-G-113-JN-ERE1 Input/Output frequency 33 MHz to 67 MHz 16.6 MHz to 40 MHz 33 MHz to 67 MHz 16.6 MHz to 40 MHz 33 MHz to 67 MHz 16.6 MHz to 40 MHz 33 MHz to 67 MHz 16.6 MHz to 40 MHz 33 MHz to 67 MHz 16.6 MHz to 40 MHz 33 MHz to 67 MHz 16.6 MHz to 40 MHz Modulation type Down Down Center Center Down Down Center Center Down Down Center Center Package Remarks
8-pin plastic SOP (FPT-8P-M02)
8-pin plastic SOP Emboss taping (FPT-8P-M02) (EF type)
8-pin plastic SOP Emboss taping (FPT-8P-M02) (ER type)
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MB88154
PACKAGE DIMENSION
8-pin plastic SOP (FPT-8P-M02) Note 1) *1 : These dimensions include resin protrusion. Note 2) *2 : These dimensions do not include resin protrusion. Note 3) Pins width and pins thickness include plating thickness. Note 4) Pins width do not include tie bar cutting remainder.
0.22 -0.07 .009 -.003
8 5
+0.03 +.001
*1 5.05 -0.20 .199 -.008
+0.25
+.010
*2 3.900.30 6.000.40 (.154.012) (.236.016)
Details of "A" part 45 1.550.20 (Mounting height) (.061.008) 0.25(.010)
0.40(.016)
1 4
"A"
0~8
1.27(.050)
0.440.08 (.017.003)
0.13(.005)
M
0.500.20 (.020.008) 0.600.15 (.024.006)
0.150.10 (.006.004) (Stand off)
0.10(.004)
C
2002 FUJITSU LIMITED F08004S-c-4-7
Dimensions in mm (inches) Note : The values in parentheses are reference values.
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MB88154
FUJITSU LIMITED
All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information, such as descriptions of function and application circuit examples, in this document are presented solely for the purpose of reference to show examples of operations and uses of Fujitsu semiconductor device; Fujitsu does not warrant proper operation of the device with respect to use based on such information. When you develop equipment incorporating the device based on such information, you must assume any responsibility arising out of such use of the information. Fujitsu assumes no liability for any damages whatsoever arising out of the use of the information. Any information in this document, including descriptions of function and schematic diagrams, shall not be construed as license of the use or exercise of any intellectual property right, such as patent right or copyright, or any other right of Fujitsu or any third party or does Fujitsu warrant non-infringement of any third-party's intellectual property right or other right by using such information. Fujitsu assumes no liability for any infringement of the intellectual property rights or other rights of third parties which would result from the use of information contained herein. The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for use accompanying fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for use requiring extremely high reliability (i.e., submersible repeater and artificial satellite). Please note that Fujitsu will not be liable against you and/or any third party for any claims or damages arising in connection with above-mentioned uses of the products. Any semiconductor devices have an inherent chance of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Law of Japan, the prior authorization by Japanese government will be required for export of those products from Japan.
F0502 (c) 2005 FUJITSU LIMITED Printed in Japan

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