ra-4574sa Epson Electronics America, Inc., ra-4574sa Datasheet

ra-4574sa

Manufacturer Part Number

ra-4574sa

Description

Serial-interface Real Time Clock Module

Manufacturer

Epson Electronics America, Inc.

Datasheet

1.RA-4574SA.pdf (1 pages)

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Signal Name Input / Output

! ! ! !

Power voltage

Clock voltage

Operating

! ! ! !

Frequency

Oscillation

For Automotive

SERIAL-INTERFACE REAL TIME CLOCK MODULE

RA - 4574 SA

Equivalent to 1 minute of monthly deviation

temperature

tolerance

start-up time

FCON

/ AIRQ

/ TIRQ

FOUT

Block diagram

DATA

Pin Function

Specifications (characteristics)

GND

CE0

CE1

CLK

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.

Frequency characteristics

FOUT

FCON

/ TIRQ

/ AIRQ

DATA

CLK

CE 1

CE 0

Recommended Operating Conditions

Real time clock module

Item

Bi-directional

Output

Input

Symbol

STA

OPR

CLK

f / f

The chip enabled input pin 0. (Built-in pull-down resistance)

When both CE0 and CE1 pins are at the “H” level , access to this

The chip enabled input pin 1.

When the CE1 pin is at the HIGH level, the FOUT pin is in the output state.

The shift clock input pin for serial data transfer.

The data input / output pin for serial data transfer.

This pin outputs the reference clock signal at 32.768 kHz ( C-MOS output ).

High impedance at the time of output off.

The input pin for the FOUT output control.

Connected to a positive power supply.

Connected to a ground.

The open drain output pin for alarm and time update interrupts.

The open drain output pin for timer interrupt.

Real time clock module becomes possible.

32.768 kHz

OUTPUT

INTERRUPTS

OSC

= +25 °C

Condition

BUS

= 3.0 V

= 1.6 V

CONTROLLER

INTERFACE

Condition

CIRCUIT

DIVIDER

: 3-wire serial interface

: 1.6 V to 5.5 V

: 0.5 A / 3 V (Typ.)

Min.

1.6

Typ.

+25

Function

3.0

3 Max.

Rating

http://www.epsontoyocom.co.jp

CLOCK and

TIMER

ALARM

CONTROL

SHIFT REGISTER

Max.

+85

5.5

CALENDAR

Unit

°C

CONTROL LINE

Actual size

! ! ! !

Current

Consumption

Current consumption characteristics

Item

Symbol

32.768 kHz frequency output function

Timer function

Alarm function

Overview

32k

Terminal connection / External dimensions

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

• Output frequency selectable from 1/30 Hz to 32.768 kHz(32 Values)

• Timer function can be set between 1/4096 second and 255 minutes.

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

• Selectable one time mode or repeat mode.

• Alarm function can be set to any combination of day of

• It is recorded automatically to AF-bit at the time of event

occurrence, and it’s possible to output with /TIRQ pin output

(open-drain output).

week, hour, or minute.

occurrence, and it’s possible to output with /AIRQ pin output

(open-drain output).

CE0, CE1 = GND

FOUT ;Output OFF

CE0 = GND

CE1 = V

FOUT ;

32.768 kHz output ON

CL = 30 pF

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

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

GND

FOUT

N.C.

( Hi - z )

Condition

Refer to application manual for details.

SOP

4574 SA

7.4

Epson Toyocom

= 5 V

= 3 V

= 5 V

= 3 V

5.0

14 pin

0.2

Min.

Typ.

14.

13.

12.

11.

10.

1.0

0.5

8.0

5.0

= 40 C to +85 C

FCON

CE1

DATA

CLK

/ TIRQ

/ AIRQ

CE0

Max.

20.0

12.0

2.0

1.0

(Unit:mm)

Unit

µA

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