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
Supply voltage
Operating temperature range
Reference input clock
Output clock
Standby current(MAX.)
Operating current (TYP)
Package
BU7344HFV
2.7V½3.6V
-5
℃½75 ℃
27.0000MHz
40.5000MHz
36.0000MHz
1.0μA
4.0mA
HVSOF6
BU7345HFV
2.7V½3.6V
-5
℃½75 ℃
27.0000MHz
38.0000MHz
36.0000MHz
1.0μA
3.5mA
HVSOF6
BU7346GUL
2.7V½3.6V
-5
℃½75 ℃
27.0000MHz
38.0000MHz
36.0000MHz
1.0μA
3.5mA
VCSP50L1
1.5mm×1.0mm
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© 2011 ROHM Co., Ltd. All rights reserved.
1/13
2011.01 - Rev.A
BU7344HFV,BU7345HFV,BU7346GUL
●Absolute
maximum ratings (Ta=25
℃)
Parameter
Supply voltage
Input voltage
Storage temperature range
Technical Note
Symbol
VDD
VIN
Tstg
Ratings
-0.3 ~ 4.0
-0.3 ~ VDD+0.3
-55 ~ 125
410(BU7344HFV,BU7345HFV)
*1
Unit
V
V
℃
Power dissipation
*1
*2
*
*
Pd
460(BU7346GUL)
*2
mW
Mounted on 70mm * 70mm * 1.6mm Glass-epoxy PCB. Derating: 4.1mW /
℃
at Ta > 25°C
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
Supply voltage
Input H voltage
Input L voltage
Operating temperature
Output load
Symbol
VDD
VINH
VINL
Topr
CL
Ratings
2.7 ~ 3.6
0.8VDD ~ VDD
0.0 ~ 0.2VDD
-5 ~ 75
15(MAX.)
Unit
V
V
V
℃
pF
●Electrical
characteristics
○BU7344HFV
(Ta=25
℃,
VDD=3.3V, Crystal frequency=27.0000MHz, unless otherwise specified.)
Parameter
Output H voltage
Output L voltage
Standby current
Consumption current 1
Consumption current 2
Pull-down load
Output frequency
OUT1
OUT2
*
Symbol
VOH
VOL
IDDst
IDD1
IDD2
Rpd
Limits
Min.
2.8
0.0
-
-
-
50
Typ.
-
-
-
4.0
3.5
100
Max.
VDD
0.5
1.0
5.2
4.6
200
Unit
V
V
μA
mA
mA
kΩ
Conditions
IOH = -3.0mA
IOL = 3.0mA
OE = L
40.5000MHz output
SEL = L
36.0000MHz output
SEL = H
input PIN, pull-down load value
CLK40.5
CLK36
40.5000
36.0000
MHz
MHz
IN*12/4/2, SEL = L
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.
2/13
2011.01 - Rev.A
BU7344HFV,BU7345HFV,BU7346GUL
○BU7345HFV
(Ta=25
℃,
VDD=3.3V, Crystal frequency=27.0000MHz, unless otherwise specified.)
Parameter
Output H voltage
Output L voltage
Standby current
Consumption current 1
Consumption current 2
Pull-down load
Output frequency
OUT1
OUT2
*
Technical Note
Symbol
VOH
VOL
IDDst
IDD1
IDD2
Rpd
Limits
Min.
2.8
0.0
-
-
-
50
Typ.
-
-
-
3.5
3.5
100
Max.
VDD
0.5
1.0
4.6
4.6
200
Unit
V
V
μA
mA
mA
kΩ
Conditions
IOH = -3.0mA
IOL = 3.0mA
OE = L
38.0000MHz output
SEL = L
36.0000MHz output
SEL = H
input PIN, pull-down load value
CLK38
CLK36
38.0000
36.0000
MHz
MHz
IN*76/27/2, SEL = L
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.)
Parameter
Output H voltage
Output L voltage
Standby current
Consumption current 1
Consumption current 2
Pull-down load
Output frequency
OUT1
OUT2
*
Symbol
VOH
VOL
IDDst
IDD1
IDD2
Rpd
Limits
Min.
2.8
0.0
-
-
-
50
Typ.
-
-
-
3.5
3.5
100
Max.
VDD
0.5
1.0
4.6
4.6
200
Unit
V
V
μA
mA
mA
kΩ
Conditions
IOH = -3.0mA
IOL = 3.0mA
PDB = L
38.0000MHz output
SEL = L
36.0000MHz output
SEL = H
input PIN, pull-down load value
CLK38
CLK36
38.0000
36.0000
MHz
MHz
XIN*76/27/2, SEL = L
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.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
3/13
2011.01 - Rev.A
BU7344HFV,BU7345HFV,BU7346GUL
●Reference
data (BU7344HFV basic data)
Technical Note
RBW:1kHz
RBW:1kH
VBW:100Hz
VBW:100Hz
10dB/div
1V/div
1V/div
5nsec/div
500psec/div
10kHz/div
Fig.1 40.5MHz output waveform
(CL=15pF,Ta=25
℃)
Fig.2 40.5MHz Period-Jitter
(CL=15pF,Ta=25
℃)
Fig.3 40.5MHz
spectrum
(CL=15pF,Ta=25
℃)
RBW:1kHz
VBW:100Hz
5nsec/div
500psec/div
10dB/div
1V/div
1V/div
10kHz/div
Fig.4 36MHz output waveform
(CL=15pF,Ta=25
℃)
●Reference
data (BU7345HFV basic data)
Fig.5 36MHz Period-Jitter
(CL=15pF,Ta=25
℃)
Fig.6 36MHz
spectrum
(CL=15pF,Ta=25
℃)
RBW:1kHz
VBW:100Hz
1V/div
5nsec/div
500psec/div
10dB/div
1V/div
10kHz/div
Fig.7 38MHz output waveform
(CL=15pF,Ta=25
℃)
Fig.8 38MHz Period-Jitter
(CL=15pF,Ta=25
℃)
Fig.9 38MHz
spectrum
(CL=15pF,Ta=25
℃)
RBW:1kHz
VBW:100Hz
1V/div
5nsec/div
500psec/div
10dB/div
1V/div
10kHz/div
Fig.10 36MHz
output waveform
(CL=15pF,Ta=25
℃)
Fig.11 36MHz Period-Jitter
(CL=15pF,Ta=25
℃)
Fig.12 36MHz
spectrum
(CL=15pF,Ta=25
℃)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
4/13
2011.01 - Rev.A
BU7344HFV,BU7345HFV,BU7346GUL
●Reference
data (BU7346GUL basic data)
Technical Note
RBW:1kHz
VBW:100Hz
10dB/div
0.5V/div
0.5V/div
5nsec/div
500psec/div
10kHz/div
Fig.13 38MHz output waveform
(CL=15pF,Ta=25
℃)
Fig.14 38MHz Period-Jitter
(CL=15pF,Ta=25
℃)
Fig.15 38MHz
spectrum
(CL=15pF,Ta=25
℃)
RBW:1kHz
VBW:100Hz
0.5V/div
0.5V/div
10dB/div
5nsec/div
500psec/div
10kHz/div
Fig.16 36MHz output waveform
(CL=15pF,Ta=25
℃)
Fig.17 36MHz Period-Jitter
(CL=15pF,Ta=25
℃)
Fig.18 36MHz
spectrum
(CL=15pF,Ta=25
℃)
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© 2011 ROHM Co., Ltd. All rights reserved.
5/13
2011.01 - Rev.A
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