MB88155 Fujitsu Media Devices, MB88155 Datasheet
MB88155
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MB88155 Summary of contents
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... MB88155 DESCRIPTION MB88155 is a clock generator for EMI (Electro Magnetic Interference) reduction. The peak of unnecessary radi- ation noise (EMI) can be attenuated by making the oscillation frequency slightly modulate periodically with the internal modulator. For modulation, the MB88155 supports both center-spreading and down-spreading. It has a non-modulated output pin (REFOUT) as well as a modulated output pin (CKOUT) ...
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... MB88155 (Continued) • Modulation clock cycle − cycle jitter : MB88155-1xx 12.5 MHz to 20 MHz less than 150 ps • 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 • Package : 8-pin plastic TSSOP ...
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... PRODUCT LINEUP The MB88155 is available in different models : 2 models different in multiplier ( × 1 and × modulation type (center-spreading and down-spreading input frequency range at a multiplier of 1 (12.5 MHz to 25 MHz and 25 MHz to 50 MHz) , and 1 in input frequency range at a multiplier of 4 (12.5 MHz to 20 MHz) . ...
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... Down spread, SEL = “H” : Modulation rate ± 1.0% Non-modulated clock output pin 5 This pin becomes to“L” at power-down. 6 GND Pin Modulated clock output pin 7 This pin becomes to“L” at power-down. 8 Power supply voltage pin MB88155 7 CKOUT -xx2 -xx3 5 REFOUT Description ...
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... I/O CIRCUIT TYPE Pin Circuit type SEL XPD 50 kΩ ENS REFOUT MB88155 Remarks • CMOS hysteresis input • CMOS hysteresis input with pull-up resistor of 50 kΩ (Typ) • CMOS output = 3 mA • • “L” output at power-down (Continued) 5 ...
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... MB88155 (Continued) Pin CKOUT For XIN pin and XOUT pin, refer to “ OSCILLATION CIRCUIT”. 6 Circuit type Remarks • CMOS output = 4 mA • • “L” output at power-down ...
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... 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. MB88155 or a voltage lower than V is applied to an ...
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... EMI PLL block Reference clock Reference clock output Power down signal V SS Phase Charge V/I compare conversion pump Loop filter MB88155 PLL block CKOUT Clock output REFOUT IDAC ICO Modulation clock output Modulation rate setting/ Modulation logic Modulation enable setting ...
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... ENS modulation enable setting ENS L H Note : Spectrum does not diffuse when “L” is set to ENS pin. MB88155-xx2, xx3 do not have ENS pin. XPD power down XPD L H Note : When setting “L” to XPD pin, it becomes power down mode (low power consumption mode) . ...
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... MB88155 • Center spread Spectrum is spread (modulated) by centering on the non-spread frequency. Radiation level Example of center spread at modulation rate ± 1.0% • Down spread Spectrum is spread (modulated) below the non-spread frequency. Modulation width 2.0% Radiation level Example of down spread at modulation rate − 2.0% 10 Modulation width 2.0% − ...
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... − 0 − 55 − 40 − 14 ⎯ − 1.0 (t ≤ UNDER ≤ UNDER ≤ OVER ≤ V − 1 IUNDER SS MB88155 Unit Max + 125 °C + 125 ° 1.0 (t ≤ OVER ⎯ ...
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... MB88155 RECOMMENDED OPERATING CONDITIONS Parameter Symbol Power supply voltage V DD “H” level input voltage V IH “L” level input voltage V IL Input clock t DCI duty cycle Operating temperature Ta WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device’ ...
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... MHz to 80 MHz REFOUT 12.5 MHz to 50 MHz °C XIN, SEL 0 ENS/XPD MHz = 0.0 V ENS V IL REFOUT 12.5 MHz to 50 MHz 12.5 MHz to 50 MHz CKOUT 50 MHz to 80 MHz MB88155 = 3.3 V ± Value Unit Min Typ Max ⎯ 5.0 7.0 ⎯ ⎯ 10 − 0.5 ⎯ V ...
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... MB88155 − 1x0, 1x2 MB88155 − 1x1, 1x3 XIN MB88155 − 4xx MB88155 − 1x0, 1x2 MB88155 − 1x1, 1x3 REFOUT MB88155 − 4xx MB88155 − 1x0, 1x2 MB88155 − 1x1, 1x3 CKOUT MB88155 − 4xx Load capacitance 15 pF, CKOUT 0 2.4 V Load capacitance 15 pF, REFOUT 0 ...
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... CYCLE-CYCLE JITTER (t JC CKOUT Note : Cycle-cycle jitter indicates the difference between a certain cycle and the immediately succeeding (or preceding) cycle DCC DCR − MB88155 1 2 n+1 15 ...
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... MB88155 MODULATION WAVEFORM • Modulation rate ± 1.0%, example of center spread CKOUT output frequency Frequency at modulation off • Modulation rate − 1.0%, example of down spread CKOUT output frequency Frequency at modulation off 16 + 1.0 % − 1.0 % (Typ) = 32.4 kHz (fin = 24 MHz) f MOD − 0.5 % − 1.0 % (Typ) = 32.4 kHz (fin = 24 MHz) ...
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... If the XPD pin is used for power-down control, the set clock signal is output from the CKOUT pin at most the lock- up time “t ” after the XPD pin goes “H” level. LK External clock stabilization waiting time (Lock-up time External clock stabilization waiting time V IH (Lock-up time MB88155 ”). For the LK (Continued) 17 ...
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... MB88155 (Continued) XIN V IH ENS (Lock-up time CKOUT If the ENS pin is used for modulation enable control during normal operation, the set clock signal is output from the CKOUT pin at most the lock-up time “t Note : The wait time for the clock signal output from the CKOUT pin to become stable is required after the IC is released from power-down mode by the XPD pin or after another pin’ ...
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... LSI internal R f XOUT pin XIN pin LSI external C 1 3rd overtone resonator LSI internal R (1 MΩ) f XOUT pin LSI external External clock OPEN MB88155 ) must be adjusted to the optimum 2 (1 MΩ) XOUT pin ...
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... Oscillation stabilization capacitance (see Capacitor of 10 µF or higher Capacitor of about 0.01 µF (connect a capacitor of good high frequency property C 4 (ex. laminated ceramic capacitor) to close to this device Impedance matching resistor for board pattern MB88155 OSCILLATION CIRCUIT ...
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... SPECTRUM EXAMPLE CHARACTERISTICS The condition of the examples of the characteristic is shown as follows : Input frequency = 16 MHz (Output frequency = 64 MHz : Using MB88155-410 (Multiplied Power-supply voltage = 3.3 V, None load capacity. Modulation rate = ± 1.0% (center spread). Spectrum analyzer HP4396B is connected with CKOUT. The result of the measurement with RBW = 1 kHz ( use for − ...
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... MHz MB88155PFT- G-400-BNDE1 MB88155PFT- G-402-BNDE1 12.5 MHz to Multiplied 20 MHz MB88155PFT- G-410-BNDE1 MB88155PFT- G-412-BNDE1 MB88155PFT- 12.5 MHz to G-100-EFE1 25 MHz MB88155PFT- 25 MHz to G-101-EFE1 50 MHz MB88155PFT- 12.5 MHz to G-102-EFE1 25 MHz MB88155PFT- 25 MHz to G-103-EFE1 50 MHz Multiplied MB88155PFT- 12.5 MHz to G-110-EFE1 25 MHz MB88155PFT- 25 MHz to G-111-EFE1 50 MHz MB88155PFT- 12.5 MHz to G-112-EFE1 25 MHz ...
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... G-103-ERE1 50 MHz Multiplied by 1 MB88155PFT- 12.5 MHz to G-110-ERE1 25 MHz MB88155PFT- 25 MHz to G-111-ERE1 50 MHz MB88155PFT- 12.5 MHz to G-112-ERE1 25 MHz MB88155PFT- 25 MHz to G-113-ERE1 50 MHz MB88155PFT- G-400-ERE1 MB88155PFT- G-402-ERE1 12.5 MHz to Multiplied 20 MHz by 4 MB88155PFT- G-410-ERE1 MB88155PFT- G-412-ERE1 Modulation Output fre- Modulation enable quency type pin Yes ...
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... MB88155 PACKAGE DIMENSION 8-pin plastic TSSOP (FPT-8P-M05) 3.00 ± 0.10(.118 ± .004) 8 INDEX 1 0.65(.026) 1.95(.077) 2002 FUJITSU LIMITED F08013Sc-1 4.40 ± 0.10 6.40 ± 0.20 (.173 ± .004) (.252 ± .008) 4 0.22 ± 0.10 (.009 ± .004) 0.10(.004) Dimensions in mm (inches) Note : The values in parentheses are reference values. ...
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... MB88155 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 ...