BU2098F, BU2090F, BU2090FS

Technical Note

3/12

www.rohm.com

2009.06 - Rev.A

© 2009 ROHM Co., Ltd. All rights reserved.

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Pin descriptions

BU2098F

PIN No.

Pin Name

I/O

Function

1

A0

I

Address input, internally pull-up

2

A1

I

3

A2

I

4

Q0

O

Open drain output

5

Q1

6

Q2

7

Q3

8

-

GND

9

Q4

O

Open drain output

10

Q5

11

Q6

12

Q7

13

N.C.

-

Non connected

14

SCL

I

Serial clock input

15

SDA

I/O

Serial data input/output

16

-

Power supply

BU2090F/BU2090FS

PIN No.

Pin Name

I/O

Function

1

-

GND

2

DATA

I

Serial data input

3

CLOCK

I

Data shift clock input (rising edge trigger)

The shift data is transferred to the output when the input data logic

level is high during the falling transition of the clock pulse.

4

Q0

O

Parallel data output (Nch Open Drain FET)

Latch data

L

H

Output FET

ON

OFF

5

Q1

6

Q2

7

Q3

8

Q4

9

Q5

10

Q6

11

Q7

12

Q8

13

Q9

14

Q10

15

Q11

16

-

Power supply