Clock Module. RX8025SA Datasheet

RX8025SA Module. Datasheet pdf. Equivalent

Part RX8025SA
Description Real Time Clock Module
Feature Real time clock module High-Stability I2C-Bus INTERFACE REAL TIME CLOCK MODULE RX - 8025 SA / NB Pr.
Manufacture EPSON Electronics
Datasheet
Download RX8025SA Datasheet



RX8025SA
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 ×106 / 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 µA / 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 the application manual for details.
*The I2C-Bus is a trademark of Philips Electronics N.V.
http://www.epsondevice.com
Block diagram
Overview
Real time clock module
RX-8025SA
RX-8025NB
Actual size
FOUT
FOE
/ INTA
/ INTB
32 kHz
Output
Control
OSC
Divider
Correc
-tion
Div.
Comparator_W
Comparator_D
Alarm_W Register
( Min,Hour,Week )
Alarm_D Register
( Min,Hour )
Time Counter
( Sec,Min,Hour,Week,Day,Month,Year )
Voltage
Detect
OSC
Detect
Interrupt Control
Address
Decoder
Address
Register
Shift Register
I/O
Control
Features built-in 32.768 kHz quartz oscillator
• Frequency adjusted for high accuracy.
( ± 5 ×106 / Ta = +25 °C )
VDD ( 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
SCL • Timer function produces a periodic interruption signal.
As for the Alarm function an optional combination is
produced. (Date of the week , time , minute)
SDA
GND
Pin Function
Signal
Name
SCL
SDA
FOUT
FOE
/ INTA
/ INTB
TEST
VDD
GND
Input / output
Function
Input
Bi-directional
Output
Input
Serial clock input pin
Data input and output pin
FOUT pin is 32.768 kHz clock output pin
(C-MOS) that output control is possible.
FOE
input
L
H
/CLEN1
bit
X
0
0
1
1
/CLEN2
bit
X
0
1
0
1
FOUT
output
OFF ( LOW )
32.768 kHz
32.768 kHz
32.768 kHz
OFF(LOW)
Output
Output
-
-
-
Interrupt output A pin ( N-ch open drain )
Interrupt output B pin ( N-ch open drain )
Used by the manufacture for testing.
(Do not connect externally.)
Connected to a positive power supply.
Connected to a ground.
Terminal connection / External dimensions
(Unit:mm)
1. N.C.
2. SCL
3. FOUT
4. N.C.
5. TEST
6. VDD
7. FOE
RX 8025 SA
5.0
7.4 ± 0.2
SOP 14 pin
14. N.C.
13. SDA
12. / INTB
11. GND
10. / INTA
9. N.C.
8. N.C.
1. FOE
2. VDD
3. (GND)
4. TEST
5. FOUT
6. SCL
7. SDA
8. / INTB
9. GND
10. / INTA
11. N.C.
RX 8025 NB
4.8
5.0 ± 0.2
22.
21.
20.
19.
18.
17.
16.
15.
1.3 ± 0.1
14.
13.
12.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
SON 22 pin
Metal may be exposed on the top or bottom of this product. This won’t affect any quality, reliability or electrical spec.
Specifications (characteristics)
.
! Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
Symbol
VDD
VCLK
TOPR
Condition
-
-
-
Min. Typ. Max.
1.7
1.15
3.0
3.0
5.5
5.5
40 +25 +85
! Frequency characteristics
Item
Symbol
Condition
Frequency
tolerance
Oscillation
start-up time
Frequency voltage
characteristics
f/f
tSTA
f/V
Ta = +25 °C
VDD = 3.0 V
Ta = +25 °C
VDD = 2.0 V
Ta = +25 °C
VDD = 2.0 V to 5.5 V
1) 2) Equivalent to 13 seconds of monthly (excluding offset).
Range
5 ± 5 1)
0 ± 5 2)
1 Max.
± 1 Max.
Unit
V
V
°C
Unit
× 106
s
× 106
! DC characteristics
Ta = 40 °C to +85 °C
Item
Symbol
Condition
Min. Typ. Max. Unit
Curent
Consumption
fSCL = 0Hz
IBK FOE = GND
FOUT ; output
VDD
=5V
VDD
OFF(LOW)
=3V
fSCL = 0Hz
I32k
VDD, FOE = 5.5 V VDD
FOUT ; output ON = 3 V
( Output=OPEN;
CL = 0 pF )
0.60 1.80
0.48 1.20
µA
3.0 6.5 µA
! Power supply detection voltage
Item
Symbol
Condition
Ta = 30 °C to +70 °C
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
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