ra-8581sa Epson Electronics America, Inc., ra-8581sa Datasheet

ra-8581sa

Manufacturer Part Number

ra-8581sa

Description

Interface Real Time Clock Module

Manufacturer

Epson Electronics America, Inc.

Datasheet

1.RA-8581SA.pdf (1 pages)

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FOUT

FOE

/ INT

SCL

SDA

! ! ! !

Power voltage

Clock voltage

Operating

! ! ! !

Frequency

FOUT output Duty

For Automotive

RA - 8581 SA

Equivalent to 1 minute of monthly deviation

temperature

tolerance

* The I

C-Bus INTERFACE REAL TIME CLOCK MODULE

Block diagram

Pin Function

Specifications (characteristics)

Built-in frequency adjusted 32.768 kHz crystal unit.

Interface Type

Operating voltage range

Wide Timekeeper voltage range : 1.6 V to 5.5 V

Low backup current

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

The various functions include full calendar, alarm, timer.

Recommended Operating Conditions

Frequency characteristics

Real time clock module

Signal Name

Item

FOUT

GND

SDA

FOE

SCL

/INT

C-Bus is a trademark of NXP Semiconductors

32.768 kHz

OSC

Symbol

tw / t

OPR

CLK

f / f

Input / Output

Bi-directional

Output

Input

FOUT

INTERRUPTS

C-BUS

= +25 C

= -40 C to +85 C

Condition

INTERFACE

CONTROLLER

= 3.0 V

= 2.4 V to 5.5 V

DIVIDER

Condition

CIRCUIT

FOUT pin outputs the reference clock signal at 32.768 kHz.

FOE pin inputs the FOUT output control.

Serial clock input pin

Data input and output pin

Interrupt output ( N-ch open drain )

Connected to a positive power supply.

Connected to a ground.

: I

: 1.8 V to 5.5 V

: 0.45 A / 3 V (Typ.)

F O E p in

H I G H

in p u t

L O W

C-Bus Interface (400 kHz)

Min.

-40

1.8

1.6

Typ.

+25

3.0

O u t p u t

O F F

http://www.epsontoyocom.co.jp

Rating

CLOCK

TIMER

ALARM

CONTROL

SYSTEM

Function

F O U T p i n

CONTROLLER

Max.

o u tp u t

+85

5.5

and

CALENDAR

and

( C - M O S )

( L O W )

Unit

Actual size

! ! ! !

Current

Consumption

Current consumption characteristics

Item

Symbol

32.768 kHz frequency output function

Timer function

Interrupt function

Interface Type

32k

Overview

Terminal connection / External dimensions

• I

• FOUT pin output (C-MOS output ), CL=30 pF

• 32.768 kHz clock frequency output. (Duty 50 ±5%)

• Timer interrupt function can be set up between

• It is recorded automatic to TF-bit at the time of event

• Alarm interrupt function, Time update interrupt function.

1/4096 second and 4095 minutes.

(N-ch open-drain output).

FOE = GND

FOUT ;Output OFF

FOE = V

FOUT ;

32.768 kHz Output ON

CL = 30 pF

occurrence,and possible to output with /TIRQ pin output

C-Bus interface. ( Hi-speed bus specifications 400 kHz )

SCL

C-Bus slave address : read A3h and write A2h

Metal may be exposed on the top or bottom of this product.

= 0 Hz

This will not affect any quality, reliability or electrical spec.

N.C.

SCL

SDA

N.C.

GND

N.C.

/ INT

( LOW )

Condition

Refer to application manual for details.

SOP

7.4

Epson Toyocom

8581 SA

5.0

= 5 V

= 3 V

= 5 V

= 3 V

14 pin

0.2

Min.

14.

13.

12.

11.

10.

Typ.

0.65

0.45

8.0

5.0

= -40 C to +85 C

FOUT

N.C.

FOE

N.C.

Max.

20.0

12.0

1.2

0.8

(Unit:mm)

Unit

µA

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