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RX-4574LC Datasheet(PDF) 1 Page - Epson ToYoCom

Part No. RX-4574LC
Description  SERIAL-INTERFACE REAL TIME CLOCK MODULE
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Maker  EPSONTOYOCOM [Epson ToYoCom]
Homepage  http://www.epsontoyocom.co.jp
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RX-4574LC Datasheet(HTML) 1 Page - Epson ToYoCom

   
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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
Actual size
Block diagram
Overview
BUS
INTERFACE
CIRCUIT
CE 1
CLK
DATA
32.768 kHz
CE 0
CONTROL
REGISTER
SHIFT REGISTER
ALARM
REGISTER
TIMER
REGISTER
CLOCK and
CALENDAR
INTERRUPTS
CONTROLLER
OUTPUT
CONTROLLER
DIVIDER
CONTROL LINE
FOUT
/ TIRQ
/ AIRQ
OSC
FCON
•••• 32.768 kHz frequency output function
• FOUT pin output (C-MOS output), CL=30 pF
• Output frequency is selectable from 1/30 Hz to 32.768 kHz
(32 Values)
•••• Timer function
• Timer function which can be set up between
1/4096 second and 255 minutes.
• It is recorded automatically to TF-bit at the time of event
occurrence, and it’s possible to output with /TIRQ pin output
(open-drain output).
• Selectable one time mode or repeat mode.
•••• Alarm function
• Alarm function can be set to any combination of day of
week, hour, or minute.
•It is recorded automatically to AF-bit at the time of event
occurrence, and it’s possible to output with /AIRQ pin output
(open-drain output).
∗∗∗∗ Functions are compatible with RTC-4574 SA / JE / NB.
Pin Function
Terminal connection / External dimensions
(Unit:mm)
Signal Name Input / Output
Function
CE0
Input
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
Real time clock module becomes possible.
CE1
Input
The chip enabled input pin 1.
When the CE1 pin is at the HIGH level, the FOUT pin is in the output state.
CLK
Input
The shift clock input pin for serial data transfer.
DATA
Bi-directional
The data input / output pin for serial data transfer.
FOUT
Output
This pin outputs the reference clock signal at 32.768 kHz ( C-MOS output ).
High impedance at the time of output off.
FCON
Input
The input pin for the FOUT output control.
/ AIRQ
Output
The open drain output pin for alarm and time update interrupts.
/ TIRQ
Output
The open drain output pin for timer interrupt.
VDD
-
Connected to a positive power supply.
GND
-
Connected to a ground.
RX − 4574 LC
1. N.C.
12.
VDD
2. N.C.
11.
CE1
3. / TIRQ
10.
CLK
4. / AIRQ
9.
DATA
5. FCON
8.
CE0
6. FOUT
2.4
2.8
7.
GND
VSOJ − 12pin
Specifications (characteristics)
∗ Refer to application manual for details.
!
!
!
! Recommended Operating Conditions
Item
Sym bol
Condition
Min.
Typ.
Max.
Unit
Power voltage
VDD
-
1.6
3.0
5.5
V
Clock voltage
VCLK
-
1.3
3.0
5.5
V
Operating
tem perature
TOPR
-
-40
+25
+85
°C
!
!
!
! Frequency characteristics
Item
Sym bol
Condition
Rating
Unit
Frequency
tolerance
∆ f / f
Ta = +25
°C
VDD = 3.0 V
5
± 23 *
× 10−6
Ta = +25
°C
VDD = 1.6 V
1 Max.
s
Oscillation
Start-up time
tSTA
Ta = -40 °C to +85 °C
VDD = 1.6 V
3 Max.
s
*Equivalent to 1 minute of monthly deviation
!
!
!
! Current consumption characteristics
T a =
−40 °C to +85 °C
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
VDD
= 5 V
0.45
0.9
IBK
CE0, CE1 = GND
FOUT ;output OFF
( Hi - z )
VDD
= 3 V
0.35
0.7
µA
VDD
= 5 V
8.0
20.0
Current
Consumption
I32k
CE0 = GND
CE1 = VDD
FOUT ;
32.768 kHz output ON
CL = 30 pF
VDD
= 3 V
5.0
12.0
µA
Small size, low profile m odel package
SERIAL-INTER FACE REA L TIME C LOCK M ODULE
RX - 4574 LC
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: 3-wire serial i nterface
Operating voltage range
: 1.6 V to 5.5 V
Wide Timekeeper voltage range : 1.3 V to 5.5 V
Low backup current
: 0.35
µA / 3 V (Typ.)
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
Product Number (Please contact us)
RX-4574LC : Q414574C2000300


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