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參數(shù)資料
| 型號： | RA-8581SA-3 |
| 廠商： | EPSON TOYOCOM CORP |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | REAL TIME CLOCK, PDSO14 |
| 封裝： | SOP-14 |
| 文件頁數(shù)： | 1/3頁 |
| 文件大?。?/td> | 256K |
| 代理商： | RA-8581SA-3 |
103
104
Real time clock module
FOR AUTOMOTIVE APPLICATIONS I2C-BUS INTERFACE REAL TIME CLOCK MODULE
RA-8581SA
Product number (please refer to page 5)
Q 4 1 A 8 8 1 5 X X X X X 0 0
It is suitable for the car accessories.
Built-in frequency adjusted 32.768 kHz crystal unit.
Compliant with I2 C high-speed bus specifications. (400 kHz)
Alarm and Timer IRQ function are Available.
32.768 kHz clock frequency output. (Duty 50 ± 5%)
Automatic adjustment for leap year.
Low backup current : 0.5 A / 3 V (Typ.)
Wide operating voltage range : 1.8 V to 5.5 V
Wide timekeeper voltage range : 1.6 V to 5.5 V
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
GND = 0V
Item
Symbol
Condition
Min.
Max.
Unit
Supply voltage
VDD
VDD to GND
-0.3
+7.0
V
Input voltage 1
VIN1
FOE pin
GND -0.3
VDD +0.3
V
Input voltage 2
VIN2
SCL, SDA pins
+8.0
Output voltage 1
VOUT1
FOUT pin
VDD +0.3
Output voltage 2
VOUT1
SDA, I
_____
NT pins
+8.0
Storage temperature
TSTG
Stored as bare product
after unpacking
-55
+125
°C
Operating range
GND = 0V
Item
Symbol
Condition
Min.
Max.
Unit
Power voltage
VDD
1.8
5.5
V
Clock voltage
VCLK
1.6
Operating temperature
TOPR
No condensation
-40
+85
°C
Frequency characteristics
GND = 0V
Item
Symbol
Condition
Range
Unit
Frequency tolerance
Δf/f
Ta = +25 °C, VDD = 3.0 V
5 ±23 1 2 x 10-6
Oscillation start-up time
tSTA
Ta = -40 °C to +85°C, VDD = 3.0 V
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 = 2.0 V to 5.0 V ±2 Max. x 10-6 / V
Aging
fa
Ta = +25 °C, VDD = 3.0 V, first year ±5 Max. x 10-6 / year
1 Equivalent to 1 minute of monthly deviation (excluding offset.)
2 Please ask tighter tolerance
DC characteristics
(GND = 0 V, VDD = 1.8 V to 5.5 V, Ta = -40°C to +85°C)
Item
Symbol
Condition
Min.
Typ.
Max. Unit
Power current 1
IDD1 fSCL = 0 Hz
I
____
NT = VDD, FOE = GND
FOUT ; output off (“L” level)
VDD = 5 V
0.65
1.2
A
Power current 2
IDD2
VDD = 3 V
0.45
0.8
Power current 3
IDD3 fSCL = 0 Hz
I
_____
NT, FOE = VDD
FOUT ; 32.768 kHz output ON,CL = 0 pF
VDD = 5 V
3.0
7.5
Power current 4
IDD4
VDD = 3 V
1.7
4.5
Power current 5
IDD5 fSCL = 0 Hz
I
_____
NT, FOE = VDD
FOUT ; 32.768 kHz output ON,CL = 30 pF
VDD = 5 V
8.0
20.0
Power current 6
IDD6
VDD = 3 V
5.0
12.0
“H” input voltage
VIH1
FOE pin
0.7 VDD
VDD+0.3
V
VIH2
SCL, SDA pins
0.7 VDD
6.0
“L” input voltage
VIL
Input pin
GND -0.3
0.3 VDD
“H” output voltage
VOH1
FOUT pin
VDD= 5V,IOH = -1 mA
4.5
5.0
VOH2
VDD= 3V,IOH = -1 mA
2.2
3.0
VOH3
VDD= 3V,IOH = -100 A
2.9
3.0
“L” output voltage
VOL1
FOUT pin
VDD= 5 V, IOL= 1 mA
GND
GND +0.5
VOL2
VDD= 3 V, IOL= 1 mA
GND
GND +0.8
VOL3
VDD= 3V,IOL = 100 A GND
GND +0.1
VOL4
I
_____
NT pin
VDD= 5 V, IOL= 1 mA
GND
GND +0.25
VOL5
VDD= 3 V, IOL = 1 mA GND
GND +0.4
VOL6
SDA pin
VDD> 2 V, IOL= 3mA
GND
GND +0.4
Leakage current
ILK
Input pin, VIN = VDD or GND
-0.5
0.5
A
Low voltage detection IOZ
I
____
NT, SDA, FOUT pins, VOUT = VDD or GND -0.5
0.5
External dimensions / Terminal connection
(Unit: mm)
(SOP 14-pin)
No.
1
2
3
4
5
6
7
Pin terminal
N.C
SCL
SDA
N.C
GND
N.C
INT
No.
14
13
12
11
10
9
8
Pin terminal
FOUT
N.C
VDD
FOE
N.C
#1
#7
#8
#14
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°
Metal may be exposed on the top or bottom of this product. This won't affect any quality, reliability or electrical spec.
Actual size
Block diagram
I
2C-Bus
interface
circuit
Fout controller
Divider
INT
SDA
FOUT
FOE
SCL
Clock and Calendar
Timer register
Alarm register
Control register
and
System Controller
Interrupts controller
OSC
32.768 kHz
The I2C-Bus is a trademark of Philips Electronics N.V.
AC characteristics
Item
Symbol
Min.
Max.
Unit
SCL clock frequency
fSCL
–
400
kHz
Allowable spike time on bus
tSP
50
ns
Start condition set-up time
tSU;STA
0.6
s
Start condition Hold time
tHD;STA
SCL “L” time
tLOW
1.3
SCL “H” time
tHIGH
0.6
SCL and SDA rise time
tr
–
0.3
SCL and SDA fall time
tf
Date set-up time
tSU;DAT
100
ns
Date hold time
tHD;DAT
0
Stop condition set-up time
tSU;STO
0.6
s
Bus free time
tBUF
1.3
Fout Duty
tw/t
45
55
%
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