BU2291AFV [ROHM]
Clock Generator, 71.877264MHz, CMOS, PDSO16, SSOP-16;
| 型号： | BU2291AFV |
| 厂家： | 
ROHM |
| 描述： | Clock Generator, 71.877264MHz, CMOS, PDSO16, SSOP-16 时钟 光电二极管 外围集成电路 晶体 |
| 文件： | 总2页 (文件大小：62K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
00W034A
Clock generator for digital still cameras
BU2291AFV
Description
Dimension (Units : mm)
The BU2291AFV is an IC that includes a 1-channel
PLL that generates dual clocks required for household
digital equipment, especially digital still cameras from
one external crystal oscillator.
Two clocks for image processing and for CDS are
generated with low jitter.
Features
1) Plural clock signals can be generated by connecting
the crystal oscillator.
2) SSOP-B16 small package
SSOP-B16
3) 3.3V single power supply
Applications
Digital still camera
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Supply voltage
Symbol
VCC
Limits
~ +70
Unit
V
–0.5
*
Pd
Power dissipation
400
mW
˚C
Operating temperature range
Storage temperature range
Topr
Tstg
–5 ~ +70
–30 ~ +125
˚C
* Derating : 4.0mW/˚C for operation above Ta=25˚C.
Recommended Operating Conditions (Ta=25˚C)
Parameter
Supply voltage
Output load
Symbol
VDD
Min.
3.0
—
Typ.
—
Max.
3.6
Unit
V
CL
—
15
pF
April, 2000
Electrical characteristics (Unless otherwise noted : Ta=25˚C, VDD=3.3V crystal frequency 14.318182MHz)
Parameter
Output L voltage
Output H voltage
Operating circuit current
REFCLK NTSC
Symbol
VOL
Min.
—
2.4
—
—
—
—
—
—
—
45
—
—
—
—
Typ.
—
Max.
0.4
—
Unit
V
Conditions
IOL=4.0mA
VOH
—
V
IOH=–4.0mA
IDD
15
—
mA
No load
REFCLK_N
REFCLK_P
CLKOUT_N0
CLKOUT_N1
CLKOUT_P0
CLKOUT_P1
Duty
14.318182
17.734475
48.461532
71.877264
48.626786
70.937900
50
—
MHz
MHz
MHz
MHz
MHz
MHz
%
NTSC XTAL through
PAL XTAL through
XTAL ¥ 176/26/2
XTAL ¥ 251/25/2
XTAL ¥ 170/31/2
XTAL ¥ 80/10/2
1/2VDD test
REFCLK PAL
—
—
CLKOUT NTSC
CLKOUT PAL
—
—
—
Duty
55
—
Short term jitter 1sigma
Jitter 1sigma
Jitter absolute
Rise time
Fall time
Js
200
psec
psec
nsec
nsec
Jabs
600
—
Short term jitter absolute
Power supply 20%~80%
Power supply 0%~80%
tr
2.5
—
tf
2.5
—
Note) CLKOUT NTSC frequency is derived when using 14.318182MHz crystal.
CLKOUT PAL frequency is derived when using 17.734475MHz crystal.
Jitter is mean value when using Time Interval Analyzer with 10,000 sampling.
Application circuit
REFCLK
1
2
3
4
5
6
7
8
Data 1a
Data 1b
Data 1c
Data 1d
16
0.1µ
15
14
0.1µ
PLL1
Data 1a : 48.626786MHz
Data 1b : 70.937900MHz
Data 1c : 48.461532MHz
Data 1d : 71.877264MHz
13
0.1µ
XTAL
12
11
NTSC : 14.318182MHz
PAL : 17.734475MHz
XTAL
OSC
FS1
10
L or NC (PULL UP)
FS0
9
CLKOUT
L or NC (PULL UP)
BU2291AFV
FS1
L
FS0
L
XTAL [MHz]
CLKOUT [MHz]
48.626786
70.937900
48.461532
71.877264
RATIO
XTAL ¥ 170/31/2
XTAL ¥ 80/10/2
XTAL ¥ 176/26/2
XTAL ¥ 251/25/2
17.734475(PAL)
L
H
H
L
14.318182(NTSC)
H
H
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