Datasheet > RA-8581SAB-3

RA-8581SAB-3

更新时间： 2024-11-25 20:00:03

品牌	Logo	应用领域
精工 - SEIKO		时钟光电二极管外围集成电路
页数	文件大小	规格书
2页	278K
描述
REAL TIME CLOCK, PDSO14, SOP-14

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中文翻译

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数据手册

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RA-8581SAB-3 数据手册

Real time clock module

REAL TIME CLOCK MODULE (I²C-Bus)

For Automotive

Product Number (Please contact us)

RA-8581SA : Q41A88152xxxx00

RA - 8581SA



Built-in frequency adjusted 32.768kHz crystal unit.

Interface Type

: I²C-Bus Interface(400kHz)

Operating voltage range

: 1.8Vto5.5V

Wide Timekeeper voltage range : 1.6Vto5.5V

Low backup current

: 0.45A/3V(Typ.)

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

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

Applications : Car audio, Car navigation system, Clock, ECU sub clock

Conforms to AEC-Q200

Actual size

* The I²C-Bus is a trademark of NXP Semiconductors

Block diagram

32.768 kHz

Overview

 Interface Type

• I²C-Bus interface. (Hi-speed bus specifications 400kHz)

I²C-Bus slave address:read A3h and write A2h

CLOCK

DIVIDER

and

OSC

CALENDAR

32.768 kHz frequency output function

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

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

FOUT

FOE

FOUT

CONTROLLER

TIMER

Timer function

• Timer interrupt function can be set up between

1/4096 second and 4095 minutes.

INTERRUPTS

CONTROLLER

ALARM

/ INT

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

occurrence,and possible to output with /TIRQ pin output

(N-ch open-drain output).

CONTROL

I²C-BUS

Interrupt function

SCL

SDA

• Alarm interrupt function, Time update interrupt function.

INTERFACE

CIRCUIT

and

SYSTEM

CONTROLLER

Pin Function

Terminal connection/External dimensions (Unit:mm)

RA8581SA

Signal Name

Input / Output

Function

SCL

SDA

Input

Serial clock input pin

1. N.C.

2. SCL

3. SDA

4. N.C.

5. GND

6. N.C.

14. FOUT

13. N.C.

12. N.C.

11. VDD

10. FOE

9. N.C.

Bi-directional

Data input and output pin

FOUT pin outputs the reference clock signal at 32.768 kHz.

FOE pin inputs the FOUT output control.

FOUT

FOE

Output

F O E p in

in p u t

F O U T p in

o u tp u t

5.0

O u tp u t

O F F

H IG H 

L O W

(C -M O S )

(L O W )

Input

7.40.2

8. N.C.

/INT

/INT

V^DD

Output

Interrupt output (N-ch open drain)

Connected to a positive power supply.

Connected to a ground.

SOP14 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.

GND

Specifications (characteristics)

 Refer to application manual for details.

 Recommended Operating Conditions

 Current consumption characteristics

Ta=-40C to+85C

Item

Symbol

Conditions

Min.

1.8

1.6

-40

Typ. Max.

Unit

Item

Symbol

Conditions

Min. Typ. Max. Unit

VDD

=5V



Power voltage

Clock voltage

VDD

3.0

5.5



fSCL=0Hz

FOE=GND

0.65 1.2

0.45 0.8

8.0 20.0

5.0 12.0

VCLK

IBK

µA

Operating

temperature

VDD

=3V



FOUT;Output OFF

(LOW)

TOPR

+25

+85

C

Current

Consumption

 Frequency characteristics

VDD

=5V



fSCL=0Hz

FOE=VDD

Item

Symbol

Conditions

Rating

Unit

Frequency

tolerance

Ta=+25C

V^DD=3.0V

I32k

f/f

10^



FOUT;

B: 523

VDD

=3V



32.768kHz Output ON

CL=30pF

FOUT

output Duty

Ta=-40C to+85C

V^DD=2.4Vto5.5V

tw/t

505

Equivalent to 1 minute of monthly deviation

中文翻译

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