ROHM BU7344HFV Technical data
A
High-performance Clock Generator Series
Compact 1ch
Clock Generators for Digital Cameras
BU7344HFV,BU7345HFV,BU7346GUL
No.11005EAT06
●Description
These Clock Generators incorporates compact package compared to oscillators, which provides the generation of
high-frequency CCD clocks necessary for digital still cameras and digital video cameras.
●Features
1) SEL pin allowing for the selection of frequencies
2) Selection of OE (PDB) pin enabling Power-down function
3) Crystal-oscillator-level clock precision with high C/N characteristics and low jitter
4) Micro miniature Package incorporated
5) Single power supply of 3.3 V
●Applications
Digital Still Camera, Digital Video Camera, and others
●Line up matrix
Parameter BU7344HFV BU7345HFV BU7346GUL
Supply voltage
Operating temperature range
2.7V～3.6V 2.7V～3.6V 2.7V～3.6V
-5 ℃～75 ℃ -5 ℃～75 ℃ -5 ℃～75 ℃
Reference input clock
Output clock
Standby current(MAX.)
Operating current (TYP)
Package
27.0000MHz 27.0000MHz 27.0000MHz
40.5000MHz 38.0000MHz 38.0000MHz
36.0000MHz 36.0000MHz 36.0000MHz
1.0μA 1.0μA 1.0μA
4.0mA 3.5mA 3.5mA
HVSOF6 HVSOF6
VCSP50L1
1.5mm×1.0mm
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.01 - Rev.
BU7344HFV,BU7345HFV,BU7346GUL
A
●Absolute maximum ratings (Ta=25 ℃)
Parameter Symbol Ratings Unit
Supply voltage VDD -0.3 ~ 4.0 V
Input voltage VIN -0.3 ~ VDD+0.3 V
Storage temperature range Tstg -55 ~ 125 ℃
Technical Note
410(BU7344HFV,BU7345HFV)
Power dissipation Pd
460(BU7346GUL)*2
*1 Mounted on 70mm * 70mm * 1.6mm Glass-epoxy PCB. Derating: 4.1mW / ℃ at Ta > 25°C
*2 Mounted on 50mm * 58mm * 1.75mm Glass-epoxy PCB. Derating: 4.6mW / ℃ at Ta > 25°C
* Operating is not guaranteed.
* The radiation-resistance design is not carried out.
●Operating conditions
Parameter Symbol Ratings Unit
Supply voltage VDD 2.7 ~ 3.6 V
Input H voltage VINH 0.8VDD ~ VDD V
Input L voltage VINL 0.0 ~ 0.2VDD V
Operating temperature Topr -5 ~ 75 ℃
Output load CL 15(MAX.) pF
●Electrical characteristics
○BU7344HFV (Ta=25
℃, VDD=3.3V, Crystal frequency=27.0000MHz, unless otherwise specified.)
Limits
Parameter Symbol
Min. Typ. Max.
*1
mW
Unit Conditions
Output H voltage VOH 2.8 - VDD V IOH = -3.0mA
Output L voltage VOL 0.0 - 0.5 V IOL = 3.0mA
Standby current IDDst - - 1.0 μA OE = L
Consumption current 1 IDD1 - 4.0 5.2 mA
Consumption current 2 IDD2 - 3.5 4.6 mA
40.5000MHz output
SEL = L
36.0000MHz output
SEL = H
Pull-down load Rpd 50 100 200 kΩ input PIN, pull-down load value
Output frequency
OUT1 CLK40.5 40.5000 MHz IN*12/4/2, SEL = L
OUT2 CLK36 36.0000 MHz IN*8/3/2, SEL = H
* The output frequency is determined by the arithmetic (frequency division) expression of a frequency input to IN.
If the input frequency is set to 27.0000MHz, the output frequency will be as listed above.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.01 - Rev.
BU7344HFV,BU7345HFV,BU7346GUL
A
○BU7345HFV (Ta=25 ℃, VDD=3.3V, Crystal frequency=27.0000MHz, unless otherwise specified.)
Limits
Parameter Symbol
Unit Conditions
Min. Typ. Max.
Output H voltage VOH 2.8 - VDD V IOH = -3.0mA
Output L voltage VOL 0.0 - 0.5 V IOL = 3.0mA
Standby current IDDst - - 1.0 μA OE = L
Technical Note
Consumption current 1 IDD1 - 3.5 4.6 mA
Consumption current 2 IDD2 - 3.5 4.6 mA
38.0000MHz output
SEL = L
36.0000MHz output
SEL = H
Pull-down load Rpd 50 100 200 kΩ input PIN, pull-down load value
Output frequency
OUT1 CLK38 38.0000 MHz IN*76/27/2, SEL = L
OUT2 CLK36 36.0000 MHz IN*8/3/2, SEL = H
* The output frequency is determined by the arithmetic (frequency division) expression of a frequency input to IN.
If the input frequency is set to 27.0000MHz, the output frequency will be as listed above.
○BU7346GUL (Ta=25
℃, VDD=3.3V, Crystal frequency=27.0000MHz, unless otherwise specified.)
Limits
Parameter Symbol
Unit Conditions
Min. Typ. Max.
Output H voltage VOH 2.8 - VDD V IOH = -3.0mA
Output L voltage VOL 0.0 - 0.5 V IOL = 3.0mA
Standby current IDDst - - 1.0 μA PDB = L
Consumption current 1 IDD1 - 3.5 4.6 mA
Consumption current 2 IDD2 - 3.5 4.6 mA
38.0000MHz output
SEL = L
36.0000MHz output
SEL = H
Pull-down load Rpd 50 100 200 kΩ input PIN, pull-down load value
Output frequency
OUT1 CLK38 38.0000 MHz XIN*76/27/2, SEL = L
OUT2 CLK36 36.0000 MHz XIN*8/3/2, SEL = H
* The output frequency is determined by the arithmetic (frequency division) expression of a frequency input to XIN.
If the input frequency is set to 27.0000MHz, the output frequency will be as listed above.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.01 - Rev.
BU7344HFV,BU7345HFV,BU7346GUL
A
●Reference data (BU7344HFV basic data)
1V/div
Fig.1 40.5MHz output waveform
5nsec/div
(CL=15pF,Ta=25
℃)
1V/div
Fig.4 36MHz output waveform
5nsec/div 500psec/div
(CL=15pF,Ta=25
℃)
●Reference data (BU7345HFV basic data)
1V/div
5nsec/div
Fig.7 38MHz output waveform
(CL=15pF,Ta=25
℃)
1V/div
Fig.10 36MHz output waveform
(CL=15pF,Ta=25
5nsec/div
℃)
1V/div
500psec/div
Fig.2 40.5MHz Period-Jitter
(CL=15pF,Ta=25
1V/div
℃)
Fig.5 36MHz Period-Jitter
(CL=15pF,Ta=25 ℃)
1V/div
500psec/div
Fig.8 38MHz Period-Jitter
(CL=15pF,Ta=25 ℃)
1V/div
500psec/div
Fig.11 36MHz Period-Jitter
(CL=15pF,Ta=25 ℃)
Technical Note
RBW:1kHz
RBW:1kH
VBW:100Hz
VBW:100Hz
10dB/div
10kHz/div
Fig.3 40.5MHz spectrum
(CL=15pF,Ta=25 ℃)
RBW:1kHz
VBW:100Hz
10dB/div
10kHz/div
Fig.6 36MHz spectrum
(CL=15pF,Ta=25 ℃)
RBW:1kHz
VBW:100Hz
10dB/div
10kHz/div
Fig.9 38MHz
(CL=15pF,Ta=25 ℃)
RBW:1kHz
VBW:100Hz
10dB/div
Fig.12 36MHz
(CL=15pF,Ta=25 ℃)
spectrum
10kHz/div
spectrum
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.01 - Rev.
BU7344HFV,BU7345HFV,BU7346GUL
A
●Reference data (BU7346GUL basic data)
0.5V/div
Fig.13 38MHz output waveform
5nsec/div
(CL=15pF,Ta=25 ℃)
0.5V/div
Fig.16 36MHz output waveform
5nsec/div 500psec/div
(CL=15pF,Ta=25
℃)
0.5V/div
500psec/div
Fig.14 38MHz Period-Jitter
(CL=15pF,Ta=25
0.5V/div
℃)
Fig.17 36MHz Period-Jitter
(CL=15pF,Ta=25 ℃)
Technical Note
RBW:1kHz
VBW:100Hz
10dB/div
10kHz/div
Fig.15 38MHz
(CL=15pF,Ta=25 ℃)
RBW:1kHz
VBW:100Hz
10dB/div
10kHz/div
Fig.18 36MHz
(CL=15pF,Ta=25 ℃)
spectrum
spectrum
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.01 - Rev.
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