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参数资料
| 型号： | RA-4574SAB |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO14 |
| 封装： | SOP-14 |
| 文件页数： | 1/1页 |
| 文件大小： | 146K |
| 代理商： | RA-4574SAB |
103
104
Real time clock module
FOR AUTOMOTIVE APPLICATIONS
RA-4574SA
Product number (please refer to page 5)
Q 4 1 A 4 7 4 5 x x x x x 0 0
It is suitable for the car accessories.
Built-in frequency adjusted 32.768kHz crystal oscillator.
Serial interface which can be controlled by three signal lines.
Alarm interrupt function for day of week, day, hour, and minute.
Timer interrupt function which can be set up between 1/4096 second and 255 minutes .
Dedicated interrupt output of the two systems (alarm and regular cycle) which allows software masking.
Ability to detect stopping of oscillation and time update.
Automatic adjustment for leap year.
Wide range of interface voltage and clock voltage between 1.6 V and 5.5 V.
Low power consumption at 0.5 A / 3 V. (Typ.)
Selectable frequency outputs function.
Available for lead (Pb) - free soldering.
Available for lead (Pb) - free terminal.
The details are mentioned in the application manual.
Specifications (characteristics)
Absolute Max. rating
Item
Symbol
Condition
Min.
Max.
Unit
Supply voltage
VDD
VDD to GND
-0.3
+7.0
V
Input voltage
VIN
Input Pin
GND -0.3
VDD +0.3
Output voltage
VOUT1
T
_______
IRQ, A
_______
IRQ
+8.0
VOUT2
FOUT,DATA
VDD +0.3
Storage temperature
TSTG
Stored as bare product
after unpacking
-55
+125
°C
Operating range
Item
Symbol
Condition
Min.
Max.
Unit
Power voltage
VDD
1.6
5.5
V
Clock voltage
VCLK
Operating temperature
VOPR
No condensation
-40
+85
°C
Frequency characteristics
Item
Symbol
Condition
Range
Unit
Frequency tolerance
Δf/f0
Ta = +25 °C, VDD = 3 V
5 ±23 1
x 10-6
Oscillation start up time
tSTA
Ta = -40 °C to +85 °C, VDD = 3.0 V 2
3 Max.
s
Frequency temperature
characteristics
Top
Ta = -20 °C to +70 °C,
VDD = 3.0 V
+10
-120
x 10-6
Frequency voltage characteristics
f/V
Ta = +25 °C,VDD = 1.6 V to 5.5 V
±2
x 10-6 / V
Aging
fa
Ta = +25 °C, VDD = 5 V, first year
±5
x 10-6 / year
1 Please ask tighter tolerance.
2 VDD Power Supply rise up time ≤ 1 ms. (0 % VDD - 90 % VDD)
DC characteristics
(GND = 0 V, VDD = 1.6 V to 5.5 V, Ta = -40 °C to +85 °C)
Item
Symbol
Condition
Min.
Typ.
Max. Unit
Standby current 1
IDD1
VDD = 5 V
CE0,CE1=GND
DATA, A
____
IRQ,TIRQ=VDD
1.0
2.0
A
Standby current 2
IDD2
VDD = 3 V
0.5
1.0
Input voltage
VIH
CE0,CE1,CLK,
DATA,FCON pins
0.8 VDD
VDD +0.3
V
VIL
GND -0.3
0.2 VDD
Input leakage
current
ILK
VIN = GND or VDD
CE1, CLK FCON pins CE0
-0.5
0.5
A
Pulldown R1
RDWN1
VDD = 5 V
CE0 pins
VIN = VDD
75
150
300
kΩ
Pulldown R2
RDWN2
VDD = 3 V
150
300
600
Output voltage 1
VOH1
VDD = 5 V
IOH = -1 mA
DATA,FOUT pins
4.5
5.0
V
VOH2
VDD = 3 V
2.0
3.0
VOH3
IOH = -100 A
DATA,FOUT pins
2.9
Output voltage 2
VOL1
VDD = 5 V
IOL = 1 mA
DATA,FOUT pins
GND
GND +0.5
VOL2
VDD = 3 V
GND +0.8
VOL3
IOL = 100 A
DATA,FOUT pins
GND +0.1
VOL4
VDD = 5 V
IOL = 1 mA
AIRQ, TIRQ pins
GND +0.25
VOL5
VDD = 3 V
GND +0.4
Output leakage current
IOZ
VOUT = GND or VDD,
DATA , AIRQ, TIRQ pins
-0.5
0.5
A
External dimensions / Terminal connection (Unit: mm)
No.
1
2
3
4
5
6
7
Pin terminal
GND
FOUT
N.C
VDD
No.
14
13
12
11
10
9
8
Pin terminal
FCON
CE1
DATA
CLK
TIRQ
AIRQ
CE0
#1
#7
#8
#14
(SOP 14-pin)
7.4
±0.2
3.2
±0.1
1.2
1.27
0.35
5.0
3.1
10.1
±0.2
0.15
0.6
0.05 Min.
0
° to 10°
Actual size
AC characteristics
(GND = 0 V, Ta = -40 °C to +85 °C)
Item
Symbol
Control
VDD = 3 V ±10%
VDD = 5 V ±10%
Unit
Min.
Max.
Min.
Max.
CLK clock cycle
tCLK
–
800
–
350
–
ns
CLK H pluse width
tWH
400
175
CLK L pulse width
tWL
CE setup time
tCS
CE hold time
tCH
CE recovery time
tCR
600
300
Write data setup time
tDS
100
50
Write data hold time tDH
80
Write data disable delay time tWZ
0
Read data delay time tRD CL = 50 pF
–
300
–
120
Output disable time
tRZ CL = 50 pF
RL = 10 kΩ
200
100
Rise and fall time
tRF
–
100
50
FOUT duty ratio
(32.768 kHz output) Duty
35
65
40
60
%
Block diagram
Bus interface circuit
Output controller
Divider
FOUT
TIRQ
AIRQ
DATA
CLK
FCON
CE1
CE0
Clock and Calendar
Timer register
Alarm register
Control register
Shift register
Interrupts controller
OSC
32.768 kHz
Control line
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