BU2279F
Multimedia ICs
1/2
Clock generator for PC
BU2279F


BU2279F is an IC that generates multiple clocks from the built-in PLL by inputting standard clocks from outside. This IC is
suitable for digital appliances.
54 MHz for video and 33.333MHz of digital system clock for CPU can be generated from widely used 13.5 MHz clock.


zApplications
DVD recorder, PC


zFeatures
1) Clock signals are generated by crystal oscillator.
2) SOP16 package.
3) Single power supply 3.3V.
4) No external components for PLL


zExternal dimensions (Units : mm)

SOP16
0.15±0.1
0.3Min.
4.4±0.26.2±0.3
0.11
1.5±0.1
0.4±0.1
1
16
10.0±0.2
8
9
1.27
0.1

zAbsolute maximum rating（Ta=25°C）
Parameter Symbol Limits Unit
∗
Ratio above does not guarantee the operation.
Impressed voltage
Input voltage
Storage temperature range
Power dissipation
VDD
VIN
Pd
Tstg
−0.5 ~ 7.0
−0.5 ~ VDD+0.5
500
−30 ~ 125
V
V
∗
°C
mW
∗
When the condition is over Ta=25 C, dissipatioin is decreased 5mWper 1 C.
∗
Radiation resistance design is not used.
∗
Power dissipation is.



zRecommended operational conditions（Ta=25°C）
Parameter Symbol UnitMax.Typ.Min.
Power supply voltage
Voltage range of "H" input
Voltage range of "L" input
Operation temperature range
Maximum output load
VDD
VIH
VIL
Topr
CL
3.0
0.8VDD
0
−5
–
–
–
–
–
–
3.6
VDD
0.2VDD
70
15
V
V
V
°C
pF