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参数资料
| 型号： | RX-8025SAAA-3 |
| 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： | ROHS COMPLIANT, SOP-14 |
| 文件页数： | 1/2页 |
| 文件大小： | 268K |
| 代理商： | RX-8025SAAA-3 |
67
RX-8025SA
RX-8025NB
High-Stability
I2C-Bus INTERFACE REAL TIME CLOCK MODULE
RX - 8025 SA / NB
Product number (please contact us)
RX - 8025 SA : Q41802551xxxx00
RX - 8025 NB : Q41802591xxxx00
Built-in 32.768 kHz quartz oscillator : Frequency adjusted for high accuracy
(
± 5 ×10
6 / Ta = +25 °C)
Interface Type
: I2C-Bus Interface (400 kHz)
Operating voltage range
: 1.70 V to 5.5 V
Wide Timekeeper voltage range
: 1.15 V to 5.5 V
Various detection Functions
: Ex. Oscillation stop detection function
Low backup current
: 0.48
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.
*The I
2C-Bus is a trademark of Philips Electronics N.V.
■ Block diagram
■ Overview
OSC
Detect
/ INTA
SCL
SDA
FOUT
FOE
32 kHz
Output
Control
Divider
Correc
-tion
Div.
Interrupt Control
/ INTB
Shift Register
Time Counter
( Sec,Min,Hour,Week,Day,Month,Year )
Address
Decoder
Address
Register
Comparator_D
Comparator_W
Alarm_W Register
( Min,Hour,Week )
I/O
Control
Alarm_D Register
( Min,Hour )
Voltage
Detect
GND
VDD
Features built-in 32.768 kHz quartz oscillator
Frequency adjusted for high accuracy.
(
± 5 ×106 / Ta = +25 °C )
( Equivalent to 13 seconds of monthly deviation )
The various detection function
Power supply voltage monitoring function
(with selectable detection threshold )
Stop detection function
Power-on reset detection function
Alarm function and Timer function
Timer function produces a periodic interruption signal.
As for the Alarm function an optional combination is
produced. (Date of the week , time , minute)
■ Pin Function
■ Terminal connection / External dimensions
(Unit:mm)
Signal
Name
Input / output
Function
SCL
Input
Serial clock input pin
SDA
Bi-directional Data input and output pin
FOUT
Output
FOE
Input
FOUT pin is 32.768 kHz clock output pin
(C-MOS) that output control is possible.
FOE
input
/CLEN1
bit
/CLEN2
bit
FOUT
output
L
X
OFF ( LOW )
0
32.768 kHz
0
1
32.768 kHz
1
0
32.768 kHz
H
1
OFF(LOW)
/ INTA
Output
Interrupt output A pin ( N-ch open drain )
/ INTB
Output
Interrupt output B pin ( N-ch open drain )
TEST
-
Used by the manufacture for testing.
(Do not connect externally.)
VDD
-
Connected to a positive power supply.
GND
-
Connected to a ground.
RX
8025 SA
1.
N.C.
14.
N.C.
2.
SCL
13.
SDA
3.
FOUT
12.
/ INTB
4.
N.C.
11.
GND
5.
TEST
10.
/ INTA
6.
VDD
9.
N.C.
7.
FOE
10
.1
±
0.
2
5.0
7.4 ± 0.2
3.
2±
0.
1
1.
27
8.
N.C.
SOP
14 pin
RX
8025 NB
1.
FOE
22.
N.C.
2.
VDD
21.
N.C.
3.
(GND)
20.
N.C.
4.
TEST
19.
N.C.
5.
FOUT
18.
N.C.
6.
SCL
17.
N.C.
7.
SDA
16.
N.C.
8.
/ INTB
15.
N.C.
9.
GND
14.
N.C.
10.
/ INTA
13.
11.
N.C.
1.3 ± 0.1
4.8
6.
3
Ma
x.
5.0 ± 0.2
0.
5
12.
SON
22 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
-
1.7
3.0
5.5
V
Clock voltage
VCLK
-
1.15
3.0
5.5
V
Operating
temperature
TOPR
-
40
+25
+85
°C
Frequency characteristics
Item
Symbol
Condition
Range
Unit
Frequency
tolerance
f / f
Ta = +25
°C
VDD = 3.0 V
AA: 5
± 5 1)
AC: 0
± 5 2)
× 106
Oscillation
start-up time
tSTA
Ta = +25
°C
VDD = 2.0 V
1 Max.
s
Frequency voltage
characteristics
f / V
Ta = +25
°C
VDD = 2.0 V to 5.5 V
± 1 Max.
× 106
1) 2) Equivalent to 13 seconds of monthly deviation (excluding offset).
DC characteristics
Ta =
40 °C to +85 °C
Item
Symbol
Condition
Min.
Typ. Max.
Unit
VDD
= 5 V
0.60 1.80
IBK
fSCL = 0Hz
FOE = GND
FOUT ; output
OFF(LOW)
VDD
= 3 V
0.48
1.20
A
Curent
Consumption
I32k
fSCL = 0Hz
VDD, FOE = 5.5 V
FOUT ; output ON
( Output=OPEN;
CL = 0 pF )
VDD
= 5.5 V
3.0
6.5
A
Power supply detection voltage
Ta =
30 °C to +70 °C
Item
Symbol
Condition
Min.
Typ. Max.
Unit
High-voltage mode
VDETH
VDD pin
1.90
2.10
2.30
V
Low-voltage mode
VDETL
VDD pin
1.15
1.30
1.45
V
Real time clock module
Actual size
http://www.epsondevice.com
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