Real time clock module

Actual size

Block diagram

Overview

High Stability

( Equivalent to 9 seconds of month deviation )

UB

± 5.0 x 10

-6

/

-40 ºC to +85 ºC

( Equivalent to 13 seconds of month deviation )

UC

± 5.0 x 10

-6

/

-30 ºC to +70 ºC

AA

(+5 ± 5.0) x 10

-6

/

+25 ºC

High Resolution: 1/100s Time register with capture buffer

 32.768 kHz frequency output function

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

 Output selectable: 32.768 kHz, 1024 Hz, 1 Hz

 The various interrupt

 Timer Function can be set between 1/ 4096 second and

4095 minutes.

 Alarm Function can be set to day of week, day, hour, or minute.

 EVIN input.

 Time synchronize function with 1PPS signal input

 Register compatibility: upper compatible with RX-4801.

*It is possible to use it by the terminal connection as

32.768 kHz-DTCXO.

Pin Function

Terminal connection

/External dimensions

(Unit:mm)

4803SA

1.

CE

14.

DI

2.

CLK

13.

DO

3.

FOUT

12.

4.

N.C.

11.

GND

5.

TEST

10.

/

INT

6.

9.

EVIN

7.

FOE

5.0

8.

N.C.

SOP14 pin

RX

4803LC

1. N.C.

12.

EVIN

2. FOE

11.

/INT

10.

GND

4. FOUT

9.

T2(Vpp)

5. CLK

8.

DO

6. CE

2.4

2.8

7.

DI

VSOJ

12pin

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.

REAL TIME CLOCK MODULE (SPI-Bus)

Built-in 32.768 kHz-DTCXO, High Stability

Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.

1/100s resolution Time register

Interface Type

: 4-wire serial interface

Interface voltage range

: 1.6 V to 5.5 V

Temp. compensated voltage range

: 2.2 V to 5.5 V

Clock supply voltage range

: 1.6 V to 5.5 V

 Selectable clock output (32.768 kHz, 1024 Hz, 1 Hz)

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

Epson is prepared Linux driver for this product.

The registered trademark Linux® is used pursuant to a sublicense from LMI(Linux Mark Institute)

Signal Name

I / O

Function

CE

input

The chip enable input pin.

CLK

input

The shift clock input pin for serial data transfer.

FOUT

Output

The pin outputs the reference clock signal.

( CMOS output )

TEST

input

Use by the manufacture for testing.

( Do not connect externally. RX-4803SA only.)

-

Connected to a positive power supply

FOE

input

The input pin for the FOUT output control.

EVIN

input

External event input.

/ INT

Output

Interrupt output (N-ch. open drain).

GND

-

Connected to a ground

-

Use by the manufacture for testing.

( Do not connect externally.)

DO

Output

The data output pin for serial data transfer.

D I

input

The data input pin for serial data transfer.



Electrical Characteristics

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Interface voltage

 Interface voltage

1.6

3.0

5.5

V

Temp. compensated Voltage

Temp. compensated voltage

2.2

3.0

5.5

V

Clock supply voltage

-

1.6

3.0

5.5

V

Operating temperature

No condensation

-40

+25

+85

ºC

Stability

f/f

UA

Ta

= -40 ºC to +85 ºC

±3.4

1

UB

Ta

=-40 ºC to +85 ºC

±5.0

2

UC

Ta

= -30 ºC to +70 ºC

AA

Ta

=+25 ºC

5 ± 5.0

3

Current consumption (1)

Backup Mode

FOE = GND,

FOUT output : OFF

-

0.75

3.4

A

Current consumption (2)

-

0.75

2.1

3)

Equivalent to 13 seconds of month deviation. ( excluding offset )

Product Number (Please contact us)

RX-4803SA: X1B000132xxxx00

RX-4803LC: X1B000122xxxx00

RX-4803SA

RX-4803LC



32.768 kHz-DTCXO Frequency temperature characteristics (Example)

Frequency temperature characteristics

-30

-25

-20

-15

-10

-5

0

5

10

-45

-35

-25

-15

-5

5

15

25

35

45

55

65

75

85

Temperature (ºC)

Tuning fork X'tal

32.768 kHz DTCXO

32kHz

DTCXO

32.768 kHz

EVIN

CLOCK

and

CALENDAR

TIMER

REGISTER

ALARM

REGISTER

FOUT

CONTROLLER

SYSTEM

CONTROLLER

and

CONTROL

REGISTER

DIVIDER

INTERRUPT

CONTROLLER

INTERFACE

CIRCUIT

FOUT

FOE

/ INT

CLK

DO

D I

CE

*Stop using the glue

Any glue must never use it after soldering LC-package to a circuit board.This product has glass on the back side

of a package.When glue invasions between circuit board side and glass side, then glass cracks by thermal

expansion of glue.In this case a crystal oscillation stops.Consider glue abolition or glue do not touch to

LC-package