BU9873F-GTE2 datasheet(3/40 Pages) ROHM

No de pièce	BU9873F-GTE2

Description	I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment

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Fabricant	ROHM [Rohm]

Site Internet	http://www.rohm.com

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Datasheet

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BU9873

TSZ02201-0919AGZ00010-1-2

13.Sep.2013 REV.001

www.rohm.com

TSZ22111・15・001

Pin Configuration

(TOP VIEW)

Pin Description

Pin No.

Symbol

Input/Output

Function

1

32KOUT

Output

The 32KOUT pin is used to output 32.768 kHz clock pulses, which is

controlled by an internal register. This pin is enabled during power-on

from 0V, and is CMOS push-pull output.

2

SCL

Input

The SCL pin is used to input clock pulses synchronizing the input/output

data from SDA pin.

3

SDA

Input/Output

The SDA pin is used to input and output data for writing and reading,

which is synchronized with SCL pin. This pin is N-channel open drain

output.

4

VSS

-

The VSS pin is grounded.

5

INTRB

Output

The INTRB pin is used to output periodic interrupt, or alarm interrupt

(Alarm_A, Alarm_B) to the CPU. This pin is disabled during power-on

from 0V, and is also N-channel open drain output.

6

OSCOUT

-

The OSCIN and OSCOUT pins are used to connect the 32.768 kHz

crystal oscillator (Beside the crystal, all other oscillation circuit

components is already integrated in this IC).

7

OSCIN

-

8

VDD

-

The VDD pin is connected to the power supply.

Figure 3. Pin configuration

8

7

6

5

1

2

3

4

VDD

OSCIN

OSCOUT

INTRB

32KOUT

SCL

SDA

VSS

BU9873F

:SOP8

BU9873FJ

:SOP-J8

BU9873FVT

:TSSOP-B8

BU9873FVM

:MSOP8

BU9873NUX

:VSON008X2030

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