Technical Note

3/13

BU7344HFV,BU7345HFV,BU7346GUL

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2011.01 - Rev.A

© 2011 ROHM Co., Ltd. All rights reserved.

○

BU7345HFV (Ta=25 ℃, VDD=3.3V, Crystal frequency=27.0000MHz, unless otherwise specified.)

Parameter

Symbol

Limits

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

Consumption current 1

IDD1

-

3.5

4.6

mA

38.0000MHz output

SEL = L

Consumption current 2

IDD2

-

3.5

4.6

mA

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.)

Parameter

Symbol

Limits

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

38.0000MHz output

SEL = L

Consumption current 2

IDD2

-

3.5

4.6

mA

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.