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BU3087FV-E2 数据表(PDF) 5 Page - Rohm

部件名 BU3087FV-E2
功能描述  Built in VCXO,Spread-Spectrum Clock Generator
Download  26 Pages
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BU3087FV-E2 数据表(HTML) 5 Page - Rohm

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Datasheet
Datasheet
BU3087FV
© 2012 ROHM Co., Ltd. All rights reserved.
www.rohm.com
j
TSZ22111・15・001
TSZ02201-0E3E0J500040-1-2
17.AUG.2012 Rev.001
●Electrical Characteristics
DC Characteristics
(VDD=3.3V, Ta=25°C, Crystal Frequency=27.000000MHz, at No Load, unless otherwise specified)
Parameter
Symbol
Limit
Unit
Conditions
Min.
Typ.
Max.
Output H voltage
VOH
VDD-0.4
V
IOH=4.0mA
Output L voltage
VOL
0.4
V
IOL=4.0mA
Operating
Circuit current
IDD
45.0
58.0
mA
Output no load,
±0.50% Modulation
Input H current 1
IupH
-1.5
1.5
μA
PDB, SSON, MODSEL1 Terminal
VIH=VDD
Input H current 2
IdnH
35.0
70.0
105.5
μA
MODSEL2, TEST Terminal,VIH=VDD
Input H current 3
IdirH
-1.5
1.5
μA
VCTRL Terminal,VIH=VDD
Input L current 1
IupL
-105.5
-70.0
-35.0
μA
PDB, SSON, MODSEL1 Terminal
VIL=0.0V
Input L current 2
IdnL
-1.5
1.5
μA
MODSEL2, TEST Terminal,VIL=0.0V
Input L current 3
IdirL
-1.5
1.5
μA
VCTRL Terminal,VIL=0.0V
CLKOUT
CLKOUT 74.248144 74.250000 74.251856
MHz VCTRL=1/2VDD
Crystal Pullability
fp
±80
±105
±130
ppm 0≦VCTRL≦VDD
1
Spread-Spectrum
Modulation Frequency
Fmod
32.5
34.5
36.5
kHz
Triangular Modulation,
Independently of Modulation Rate
※1 This is a guarantee with only IC. It is finished with confirmation to operate with Crystal (DSX321G・8pF load) made in DAISHINKU CORP.
AC Characteristics
(VDD=3.3V, Ta=25°C, Crystal Frequency=27.000000MHz, Output load=15pF, unless otherwise specified)
Following the table cannot test directly on characteristic when shipment, so it is a design guarantee.
Parameter
Symbol
Limit
Unit
Conditions
Min.
Typ.
Max.
Duty
Duty
45
50
55
%
Measured at 1/2VDD
Jitter 1σ
JsSD
35
psec
Period Jitter 1σ
2,
in Spread-Spectrum OFF
Jitter P-P
JsABS
180
psec
Period Jitter MIN-MAX value
2,
in Spread-Spectrum OFF
Jitter
Cycle-to-Cycle
JsCyCy
180
psec
Cycle-to-Cycle Jitter,
In ±0.50% Modulation
Rise Time
Tr
1.2
nsec
Time between 0.2VDD and 0.8VDD
Fall Time
Tf
0.7
nsec
Time between 0.8VDD and 0.2VDD
Lock Up Time
Tlock
1
msec
3
※2 Jitter means center value when using Japan Tektronix : TDS7104 Digital Phosphor Oscilloscope.
※3 Time between voltage supply leads to 3.135V and output clock gets stable.
●Spread-Spectrum Modulation Waveform
Modulation Waveform is triangular. Modulation Rate is selectable among ±0.25%/±0.50%/±0.75%/±1.00%.
In addition, Modulation Frequency is 34.5kHz without depending on Modulation Rate.
( Figure 4 shows ±0.50% Modulation Waveform. )
74.250000MHz
74.250000MHz x (100 + 0.5)%
74.250000MHz x (100 - 0.5)%
Modulation Frequency; 34.5kHz
Figure 4. Spread-Spectrum Modulation Waveform


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