Actual size

Real time clock module

Block diagram

Overview

OSC

OSC

Detect

/ INTA

SCL

SDA

FOUT

FOE

32 kHz

Output

Control

Divider

Correc

-tion

Div.

Interrupt Control

/ INTB

Shift Register

Time Counter

( Sec,Min,Hour,Week,Day,Month,Year )

Address

Decoder

Address

Register

Comparator_D

Comparator_W

Alarm_W Register

( Min,Hour,Week )

I/O

Control

Alarm_D Register

( Min,Hour )

Voltage

Detect

GND

Features built-in 32.768kHz crystal unit

• Frequency adjusted for

high accuracy.

(

(

Equivalent to 13 seconds of monthly deviation)

The various detection function

• Power supply voltage monitoring function

(with selectable detection threshold)

• Stop detection function

• Power-on reset detection function

Alarm function and Timer function

• Timer function produces a periodic interruption signal.

As for the Alarm function an optional combination is produced.

(Date of the week , time , minute)

Pin Function

Terminal connection

/External dimensions

(Unit:mm)

Signal

Name

Input / output

Function

SCL

Input

Serial clock input pin

SDA

FOUT

Output

FOE

Input

32.768

kHzclock output pin with the output

control function. (C-MOS)

FOE

input

/CLEN1

bit

/CLEN2

bit

FOUT

output

L

X

X

OFF (

LOW)

0

0

32.768 kHz

0

1

32.768 kHz

1

0

32.768 kHz

H

1

1

OFF(LOW)

/ INTA

Output

Interrupt output A pin (

N-ch open drain)

/ INTB

Output

Interrupt output B pin (

N-ch open drain)

TEST

-

Used by the manufacture for testing.

(Do not connect externally.)

-

Connected to a positive power supply.

GND

-

Connected to a ground.

8025SA

1.

N.C.

14.

N.C.

2.

SCL

13.

SDA

3.

FOUT

12.

/

INTB

4.

N.C.

11.

GND

5.

TEST

10.

/

INTA

6.

9.

N.C.

7.

FOE

5.0

8.

N.C.

SOP

14 pin

8025NB

1.

FOE

22.

N.C.

2.

21.

N.C.

3.

(GND)

20.

N.C.

4.

TEST

19.

N.C.

5.

FOUT

18.

N.C.

6.

SCL

17.

N.C.

7.

SDA

16.

N.C.

8.

/

INTB

15.

N.C.

9.

GND

14.

N.C.

10.

/

INTA

13.



11.

N.C.

4.8

12.



SON22 pin

The metal case inside of the molding compound may be exposed on the top or bottom of this product.

This purely cosmetic and does not have any effect on quality, reliability or electrical specs.

Specifications (characteristics)

 Refer to application manual for details.

.

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Power voltage

-

1.7



3.0

5.5

V

Clock voltage

-

1.15

3.0

5.5

V

Operating

temperature

-

-40

+25

+85

C

Item

Symbol

Conditions

Range

Unit

Frequency

tolerance

f/f

=+25C

=3.0V

AA: 5

AC: 0

Oscillation

start-up time

=+25C

=2.0V

1

Max.

s

Frequency voltage

characteristics

f

/V

=+25C

=2.0Vto5.5V

1Max.

1)2)Equivalent to 13 seconds of monthly deviation (excluding offset).

=-40C to +85C

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Curent

Consumption

FOE

=GND

FOUT

;output

OFF(LOW)

5V

-

0.60

1.80

µA

3V

-

0.48

1.20

FOE=5.5V

FOUT

;output ON

(

Output=OPEN;

CL

=0pF)

5.5V



-

3.0

6.5

µA

=-30C to +70C

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

High-voltage mode

1.90

2.10

2.30

V

Low-voltage mode

1.15

1.30

1.45

V

RX-8025SA

RX-8025NB

REAL TIME CLOCK MODULE (I

High-Stability

Built-in 32.768 kHz crystal unit

: Frequency adjusted for high accuracy



(

Interface Type

: I

(400kHz)

Operating voltage range: 1.70Vto5.5V

Wide Timekeeper voltage range

: 1.15

Vto5.5V

Various detection Functions

: Ex. Oscillation stop detection function

Low backup current

: 0.48

A/3V(Typ.)

32.768 kHz frequency output function : C-MOS output With Control Pin

The various functions include full calendar, alarm, timer.

* The I

Product Number (Please contact us)

RX-8025SA : Q41802552xxxx00

RX-8025NB : Q41802592xxxx00