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Real time clock module

Real time clock module

Real time clock module

Real time clock module

Epson Toyocom

Epson Toyocom

Epson Toyocom

Epson Toyocom

Block diagram

Overview

BUS

INTERFACE

CIRCUIT

32.768 kHz

CONTROL

REGISTER

ALARM

REGISTER

TIMER

REGISTER

CLOCK

and

CALENDAR

INTERRUPTS

CONTROLLER

FOUT

CONTROLLER

DIVIDER

CO NTRO L LINE

FOUT

/ IRQ

CLK

DIO

CE

OSC

SYSTEM

CONTROLLER

FOE

and

•••• 32.768 kHz frequency output function

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

•••• Timer function

• Timer function which can be set up between

1/4096 second and 4095 minutes.

•••• Alarm function

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

day of week, hour, or minute.

•••• Pin Function

Signal

Name

Input / Output

Function

CE

Input

The chip enabled input pin 0.

( It has a built -in pull-down resistance )

CLK

Input

The shift clock input pin for serial data transfer.

DIO

Bi-directional

The data input / output pin for serial data transfer.

FOUT

Output

FOE

Input

32.768 kHz clock output pin with the output control

function. ( C-MOS )

FOE pin control the condition of FOUT with

FSEL1-bit, FSEL0-bit, etc.

/ IRQ

Output

Interrupt output

( N-ch open drain )

-

Connected to a positive power supply.

GND

-

Connected to a ground.

Terminal connection / External dimensions

(Unit:mm)

RX

− 4571 LC

1.

FOE

12.

2.

N.C.

11.

N.C.

3.

DIO

10.

N.C.

4.

CLK

9.

N.C.

5.

CE

8.

/IRQ

6.

GND

2.4

2.8

7.

FOUT

VSOJ − 12pin

RX

− 4571 NB

1.

FOE

22.

N.C.

2.

DIO

21.

N.C.

3.

(GND)

20.

N.C.

4.

CLK

19.

N.C.

5.

CE

18.

N.C.

6.

GND

17.

N.C.

7.

N.C.

16.

N.C.

8.

N.C.

15.

N.C.

9.

FOUT

14.

N.C.

10.

/IRQ

13.

−

11.

4.8

12.

−

SON − 22 pin

RX

− 4571 SA

1.

GND

14.

FOUT

2.

N.C.

13.

N.C.

3.

CE

12.

N.C.

4.

CLK

11.

N.C.

5.

DIO

10.

/ IRQ

6.

N.C.

9.

N.C.

7.

FOE

5.0

8.

SOP - 14 pin

Metal may be exposed on the top or bottom of this product. This w ill not affect any quality, reliability or electrical spec.

Specifications (characteristics)

∗ Refer to application manual for details.

!

!

!

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

Power voltage

−

1.6

3.0

5.5

V

°C

1.0

3.0

5.5

V

Clock voltage

−40 to +85 °C

1.1

3.0

5.5

V

Operating

temperature

−

−40

+25

+85

°C

!

!

!

Item

Symbol

Condition

Rating

Unit

Frequency

tolerance

∆ f / f

5 ± 23 *

Oscillation

start-up time

1 Max.

s

* Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)

!

!

!

−40 °C to +85 °C

Symbol

Condition

Min.

Typ.

Max.

Unit

= 5 V

0.40

1.00

CE = GND

/IRQ = OFF

FOUT ;

output OFF ( Hi - z )

= 3 V

0.32

0.95

µA

= 5 V

8.0

14.0

CE = GND

/IRQ = OFF

FOUT ;

32.768 kHz output

ON

CL = 30 pF

= 3 V

5.0

8.5

µA

LOW BACKUP VOLTAGE

SERIAL-INTERFACE REAL TIME CLOCK MODULE

•Built in frequency adjusted 32.768 kHz crystal unit.

•Interface Type

: 3-wire serial i nte rface

•Operating voltage range

: 1.6 V to 5.5 V

•Wide Timekeeper voltage range

°C

•Low backup current

: 0.32

µA ( Typ. ) / 3 V

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

•Real-time clock function

Clock/cale ndar function, a uto leap yea r correction functio n,

alarm i nte rrupt functio n, etc.

RX-4571NB

RX-4571SA

RX-4571LC

Product Number (Please contact us )

RX-4571LC : Q414571C1000100

RX-4571NB : Q41457191000100

RX-4571SA : Q41457151000100