BU2279F-E1 [ROHM]
Clock Generator, CMOS, PDSO16;
| 型号： | BU2279F-E1 |
| 厂家： | 
ROHM |
| 描述： | Clock Generator, CMOS, PDSO16 时钟 控制器 微控制器 微控制器和处理器 光电二极管 时钟发生器 |
| 文件： | 总2页 (文件大小：40K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
BU2279F
Multimedia ICs
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.
zExternal dimensions (Units : mm)
zApplications
DVD recorder, PC
10.0±0.2
16
9
zFeatures
1
8
0.15±0.1
0.1
1) Clock signals are generated by crystal oscillator.
2) SOP16 package.
1.27
0.4±0.1
3) Single power supply 3.3V.
4) No external components for PLL
SOP16
zAbsolute maximum rating（Ta=25°C）
Parameter
Impressed voltage
Input voltage
Symbol
Limits
−0.5 ~ 7.0
−0.5 ~ VDD+0.5
500
Unit
V
V
DD
IN
V
V
mW
°C
Storage temperature range
Power dissipation
Pd
Tstg
−30 ~ 125
Ratio above does not guarantee the operation.
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
Min.
3.0
0.8VDD
0
Typ.
Max.
3.6
Unit
Power supply voltage
V
DD
IH
IL
–
–
–
–
–
V
V
Voltage range of "H" input
Voltage range of "L" input
Operation temperature range
Maximum output load
V
VDD
V
0.2VDD
70
V
Topr
CL
−5
°C
pF
–
15
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BU2279F
Multimedia ICs
zElectric Characteristics (Unless any specification, Vcc=3.3V, Ta=25°C, Crystal frequency=13.500MHz)
Parameter
Output "L" voltage
Output "H" voltage
Operation current
VCLK
Symbol
Min.
−
Typ.
−
Max.
Unit
V
Conditions
V
OL
OH
DD
0.4
I
I
OL=4.0mA
−
V
24
−
−
V
OH=−4.0mA
I
30
60
−
mA
MHz
MHz
No load
VCLK
SCLK
−
54.00
33.333
Xtal+ 160 20
Xtal+ 400 27
2
6
SCLK
−
−
Design assurances
Duty V
Duty S
Jstd1
Jstd2
tr
45
48
−
50
53
55
58
−
%
Measured at 1/2VDD
Measured at 1/2VDD
Jitter 1σ
VCLK Duty
SCLK Duty
%
80
psec
psec
nsec
nsec
msec
Jitter1
−
400
2.5
2.5
−
−
Jitter MIN=MAX
Jitter2
−
−
Rise time
Fall time
tr
−
−
tLOCK
−
1
LOCK time of output
Remarks ) The output frequency is calculated from the input frequency of XTALIN. The value of output frequency above is the case of input frequency is 13.5MHz.
The values of Jitter above are the center value of 10000 sampling by time interval analyzer.
) The time for output frequency to be stabled after the power supply become 3.0V.
zApplication circuit
Fixed to "L"
CTRL1
TEST1
CTRL2
AGND
OE
CTRL3
TEST2
1
2
3
4
5
6
7
8
16
15
14
Fixed to "L"
Fixed to "L"
AVDD 13
DGND
DVDD
DVDD
SCLK
DVDD
VCLK
12
11
10
9
33.3MHz output
0.1µF
XTALIN
XTALOUT
54MHz output
BU2279F
0.1µF
0.1µF
0.1µF
Remarks) The IC is basically needed to be on the board. (Unless it is on the board, the characteristics are not guaranteed.) Decoupling capacitance(0.1µF)
is needed to be placed between 13PIN(AVDD) and 4PIN(AGND).Decoupling capacitance(0.1µF)is needed to be placed between 16PIN(DVDD)
10PIN(DVDD), 12PIN(DVDD) and 5PIN(DGND) each.
To adjust the frequency of crystal, place a certain value of capacitance(pF) between 7 or 8PIN and DGND.
2pin and 4pin are needed to be fixed to "OPEN" through the operation.
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