rx-4574lc Epson Electronics America, Inc., rx-4574lc Datasheet

rx-4574lc

Manufacturer Part Number

rx-4574lc

Description

Small Size, Low Profile Model Package Serial-interface Real Time Clock Module

Manufacturer

Epson Electronics America, Inc.

Datasheet

1.RX-4574LC.pdf (1 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

RX-4574LC

Manufacturer:

EPSON

Quantity:

50 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

rx-4574lc:B3 PURE SN

Manufacturer:

SMSC

Quantity:

510

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Download datasheet (189Kb)

Signal Name Input / Output

! ! ! !

Power voltage

Clock voltage

Operating

! ! ! !

Frequency

Oscillation

Small size, low profile model package

SERIAL-INTERFACE REAL TIME CLOCK MODULE

RX - 4574 LC

*Equivalent to 1 minute of monthly deviation

FOUT

FCON

/ TIRQ

/ AIRQ

DATA

CLK

CE 1

CE 0

/ AIRQ

/ TIRQ

temperature

tolerance

Start-up time

FOUT

FCON

DATA

Pin Function

GND

Specifications (characteristics)

CE0

CE1

CLK

Built in frequency adjusted 32.768 kHz crystal unit.

Interface Type

Operating voltage range

Wide Timekeeper voltage range : 1.3 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

Block diagram

Recommended Operating Conditions

Real time clock module

Item

Bi-directional

Output

Input

Symbol

STA

OPR

CLK

f / f

32.768 kHz

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.

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

The open drain output pin for timer interrupt.

Connected to a positive power supply.

Connected to a ground.

OUTPUT

INTERRUPTS

Real time clock module becomes possible.

OSC

BUS

= +25 C

= -40 C to +85 C

Condition

CONTROLLER

INTERFACE

= 3.0 V

= 1.6 V

CIRCUIT

Condition

DIVIDER

: 3-wire serial interface

: 1.6 V to 5.5 V

: 0.35 A / 3 V (Typ.)

Min.

1.6

1.3

-40

Typ.

+25

3.0

Function

CLOCK and

TIMER

ALARM

CONTROL

SHIFT REGISTER

1 Max.

3 Max.

Rating

5 23 *

http://www.epsontoyocom.co.jp

Max.

+85

5.5

CALENDAR

Unit

CONTROL LINE

Actual size

! ! ! !

Current

Consumption

Current consumption characteristics

Item

Functions are compatible with RTC-4574 SA / JE / NB.

32.768 kHz frequency output function

Timer function

Alarm function

Overview

Symbol

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

• Output frequency is selectable from 1/30 Hz to 32.768 kHz

• Timer function which can be set up between

• 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

32k

(32 Values)

1/4096 second and 255 minutes.

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).

Terminal connection / External dimensions

CE0, CE1 = GND

FOUT ;output OFF

CE0 = GND

CE1 = V

FOUT ;

32.768 kHz output ON

CL = 30 pF

1. N.C.

2. N.C.

3. /TIRQ

4. /AIRQ

5. FCON

6. FOUT

( Hi - z )

Condition

Refer to application manual for details.

VSOJ 12pin

Epson Toyocom

= 5 V

= 3 V

= 5 V

= 3 V

4574 LC

2.4

2.8

Min.

Typ.

0.45

0.35

12. V

10. CLK

8.0

5.0

11. CE1

9. DATA

8. CE0

7. GND

= 40 C to +85 C

Max.

20.0

12.0

0.9

0.7

(Unit:mm)

Unit

µA

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