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參數(shù)資料
| 型號(hào)： | RA-4574SAB-3 |
| 廠商： | EPSON TOYOCOM CORP |
| 元件分類(lèi)： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | REAL TIME CLOCK, PDSO14 |
| 封裝： | SOP-14 |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 267K |
| 代理商： | RA-4574SAB-3 |
Consumption
65
Actual size
FOR AUTOMOTIVE
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RA - 4574 SA
Product Number (please contact us)
RTC - 4574 SA
: Q41A47451xxxx00
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: Serial interface in 3 lines form.
Operating voltage range
: 1.6 V to 5.5 V
Wide Timekeeper voltage range
: 1.6 V to 5.5 V
Low backup current
: 0.5
A / 3 V (Typ.)
32.768kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
Complies with EU RoHS directive.
Refer to application manual for details.
■ 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 selectable from 1/30 Hz to
32.768 kHz(32 Values)
Timer function
Timer function can be set upbetween 1/4096 second and
255 minutes.
It is recorded automatic to TF-bit at the time of event
occurrence, and 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 automatic to AF-bit at the time of event
occurrence,and possible to output with /AIRQ pin output
(open-drain output).
■ Pin Function
■ Terminal connection /External dimensions (Unit:mm)
Signal Name Input / Output
Function
CE0
Input
The chip enabled input pin 0.
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 ( CMOS 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 interruputs.
/ TIRQ
Output
The open drain output pin for timer interrupt.
VDD
-
Connected to a positive power supply.
GND
-
Connected to a ground.
RA
4574 SA
1.
GND
14.
FCON
2.
FOUT
13.
CE1
3.
N.C.
12.
DATA
4.
N.C.
11.
CLK
5.
N.C.
10.
/ TIRQ
6.
N.C.
9.
/ AIRQ
7.
VDD
10
.1
±
0.
2
5.0
7.4 ± 0.2
3.
2±
0.
1
1.
27
8.
CE0
SOP
14 pin
Metal may be exposed on the top or bottom of this product.
This will not affect any quality, reliability or electrical spec.
■ Specifications (characteristics)
Recommended Operating Conditions
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Power voltage
VDD
-
1.6
3.0
5.5
V
Clock voltage
VCLK
-
1.6
3.0
5.5
V
Operating
temperature
TOPR
-
40
+25
+85
°C
Frequency characteristics
Item
Symbol
Condition
Rating
Unit
Frequency
tolerance
f / f
Ta = +25 °C
VDD = 3.0 V
5
± 23
× 106
Oscillation
start-up time
tSTA
Ta = +25 °C
VDD = 1.6 V
3 Max.
s
Please ask for tighter tolerance.(Equivalent to 1 minute of monthly deviation)
DC characteristics
Ta =
40 °C to +85 °C
Item
Symbol
Condition
Min.
Typ. Max. Unit
VDD
= 5 V
1.0
2.0
IBK
CE0, CE1 = GND
FOUT ;Output OFF
( Hi - z )
VDD
= 3 V
0.5
1.0
A
VDD
= 5 V
8.0
20.0
Current
I32k
CE0 = GND
CE1 = VDD
FOUT ;
32.768 kHz output ON
CL = 30 pF
VDD
= 3 V
5.0
12.0
A
Real time clock module
http://www.epsondevice.com
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