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NCMOS Low Power Consumption NInput Frequency NDivider Ratio NMultiplier Ratio : 12KHz to 35MHz : 1, 3 ~ 2047 divisions
GCrystal Oscillation Modules GPersonal Computers GPDAs
1
(laser trimming) GPortable Audio Systems : 6 ~ 2047 multiplications
GVarious System Clocks
(laser trimming) NComparative Frequency : 12KHz ~ 500KHz NOutput Frequency : 3MHz ~ 30MHz NMini Mold SOT-26 Package
The XC25BS5 series are high frequency, low power consumption PLL clock generator ICs with divider circuit & multiplier PLL circuit. Laser trimming gives the option of being able to select from divider ratios (M) of 1,3 to 2047 and multiplier ratios (N) of 6 to 2047. Output frequency (Q0) is equal to reference oscillation (fCLKin) multiplied by N/M, within a range of 3MHz to 30MHz. Q1 output is selectable from input reference frequency (f0), input reference frequency/2 (f0/2), ground (GND), and comparative frequency (f0/M). Further, comparative frequencies, within a range of 12KHz to 500KHz, can be obtained by dividing the reference oscillation. By halting operation via the CE pin, consumption current can be controlled and output will be one of high-impedance.
Output Frequency
: 3MHz ~ 30MHz (Q0=fCLKin x N/M)
Reference Oscillation (fCLKin) : 12KHz ~ 35MHz Divider Ratio (M) : Selectable from divisions of 1, 3 ~ 2047 Multiplier Ratio (N) : Selectable from multiplications of 6 ~ 2047 Output : 3-State Q1 output selectable from input reference oscillation, input reference oscillation/2, GND, comparative frequency. Operating Voltage Range: 2.97V ~ 5.5V Low Power Consumption : CMOS (stand-by function included)*1 Ultra Small Package : SOT-26 mini mold *1 High output impedance during standby
SOT-26 (TOP VIEW)
GCE, Q0/Q1 Pin Function
95
GOrdering Information qwert
1
qwe
GSOT-26
96
qRepresents the Series name
qwer
weRepresents the second and third figure of the Product Number. w e
1
rRepresents the Assembly Lot No. (Based on internal standards)

97
1
GElectrical Characteristics (DC)
GElectrical Characteristics (AC)
98
1
GElectrical Characteristics (DC)
GElectrical Characteristics (AC)
99
q Q1 Pin - reference oscillation, reference oscillation/2, comparative frequency.
1
w Q1 Pin - GND
(1) Please insert a by-pass capacitor of 0.1F. (2) Rq0 and Rq1 are matching resistors. Their use is recommended in order to counter unwanted radiations. (3) Please place a by-pass capacitor and matching resistors as close to the IC as possible. It may be that the output cannot be locked if the by-pass capacitor is not close enough to the IC. Further, there is a possibility of unwanted radiation occurance between the resistor and the IC pin if the matching resistor is not close enough to the IC. (4) When selecting GND for the Q1 pin, although the output of Q1 pin is GND level, it is also recommended that the Q1 pin is connected to GND pattern on the PCB. (5) When the CE pin is not controlled by external signals, it is recommended that a time constant circuit of R1=1k x C0.1F be added for stability. (6) With this IC, output is achieved by dividing and multiplying the reference oscillation by means of the PLL circuit. In cases where this output is further used as a reference oscillation of another PLL circuit, it may be that the final output signal's jitter increases, so all necessary precautions should be taken to avoid this. (7) It is recommended that a low noise power supply, such as a series regulator, be used for the supply voltage. Using a power supply such as a switching regulator might lead to a larger jitter which in turn may lead to an inability to lock due to the ripple of the switching regulator.
100
q Q1 Pin - reference oscillation, reference oscillation/2, comparative frequency.
1
w Q1 Pin - GND
101
1) Output Rise Time / Output Fall Time
1
2) Duty Ratio
3) Output Start Time
102

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