rx-8025nb Epson Electronics America, Inc., rx-8025nb Datasheet
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rx-8025nb
Manufacturer Part Number
rx-8025nb
Description
Interface Real Time Clock Module
Manufacturer
Epson Electronics America, Inc.
Datasheet
1.RX-8025NB.pdf
(1 pages)
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Part Number:
RX-8025NB
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AMP
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Part Number:
rx-8025nb:AA3 PURE SN
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.
! ! ! !
Power voltage
Clock voltage
Operating
! ! ! !
Frequency
Oscillation
Frequency voltage
1) 2) Equivalent to 13 seconds of monthly deviation (excluding offset).
High-Stability
I
RX - 8025 SA
FOUT
FOE
/ INTA
/ INTB
2
temperature
tolerance
start-up time
characteristics
Signal
/ INTA
/ INTB
Recommended Operating Conditions
Frequency characteristics
C-Bus INTERFACE REAL TIME CLOCK MODULE
Pin Function
Name
FOUT
TEST
Specifications (characteristics)
Wide Timekeeper voltage range
GND
Built-in 32.768 kHz crystal unit
Interface Type
Operating voltage range : 1.70 V to 5.5 V
Various detection Functions
Low backup current
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
SCL
SDA
FOE
V
* The I
Block diagram
Real time clock module
Real time clock module
Real time clock module
Real time clock module
DD
Item
Item
2
Input / output
Bi-directional
C-Bus is a trademark of NXP Semiconductors
Output
Output
Output
Input
Input
-
-
-
Symbol
Symbol
Control
Detect
32 kHz
T
Output
V
OSC
V
OSC
t
f / V
OPR
STA
CLK
Serial clock input pin
DD
f / f
32.768 kHz clock output pin with the output
control function. (C-MOS)
Interrupt output A pin ( N-ch open drain )
Interrupt output B pin ( N-ch open drain )
Connected to a positive power supply.
Connected to a ground.
Data input and output pin
Used by the manufacture for testing.
(Do not connect externally.)
input
FOE
L
H
Interrupt Control
Divider
Correc
-tion
T
V
T
V
T
V
/CLEN1
a
a
a
DD
DD
DD
Condition
= +25 C
= +25 C
= +25 C
bit
X
0
0
1
1
= 3.0 V
= 2.0 V
= 2.0 V to 5.5 V
-
-
-
Condition
Div.
Function
/CLEN2
bit
X
0
1
0
1
: Frequency adjusted for high accuracy
: I
: 1.15 V to 5.5 V
: Ex. Oscillation stop detection function
: 0.48 A / 3 V (Typ.)
( 5 10
2
/
C-Bus Interface (400 kHz)
Comparator_W
Comparator_D
( Sec,Min,Hour,Week,Day,Month,Year )
Min.
1.7
1.15
NB
40
OFF ( LOW )
Address
Decoder
32.768 kHz
32.768 kHz
32.768 kHz
OFF(LOW)
FOUT
output
6
Time Counter
/ T
Typ.
+25
AC: 0
AA: 5
3.0
3.0
Shift Register
a
1 Max.
Range
http://www.epsontoyocom.co.jp
= +25 C)
1 Max.
Alarm_W Register
( Min,Hour,Week )
Alarm_D Register
Address
Register
( Min,Hour )
5
5
Max.
+85
5.5
5.5
1)
2)
Unit
Unit
10
10
V
V
Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec.
s
C
1.
2.
3.
4.
5.
6.
7.
Control
Terminal connection / External dimensions
6
6
Voltage
Detect
I/O
N.C.
SCL
FOUT
N.C.
TEST
V
FOE
DD
Actual size
RX-8025SA
! ! ! !
Curent
! ! ! !
High-voltage mode
Low-voltage mode
Consumption
RX
Power supply detection voltage
Current consumption characteristics
SOP
Item
7.4
V
SCL
SDA
GND
8025 SA
DD
5.0
0.2
Item
14 pin
Features built-in 32.768 kHz crystal unit
The various detection function
Alarm function and Timer function
Overview
Symbol
I
I
32k
BK
• Frequency adjusted for high accuracy.
• Power supply voltage monitoring function
• Stop detection function
• Power-on reset detection function
• Timer function produces a periodic interruption signal.
RX-8025NB
( 5 10
( Equivalent to 13 seconds of monthly deviation )
As for the Alarm function an optional combination is produced.
(Date of the week , time , minute)
14.
13.
12.
11.
10.
(with selectable detection threshold )
9.
8.
Symbol
f
FOE = GND
FOUT ; output
OFF(LOW)
f
V
FOUT ; output ON
( Output=OPEN;
V
V
SCL
SCL
N.C.
SDA
/ INTB
GND
/ INTA
N.C.
N.C.
DD
DETH
DETL
, FOE = 5.5 V
= 0Hz
= 0Hz
6
Condition
/ T
CL = 0 pF )
Refer to application manual for details.
a
= +25 C )
10.
11.
Condition
1.
2.
3.
4.
5.
6.
7.
8.
9.
V
V
DD
DD
FOE
V
(GND)
TEST
FOUT
SCL
SDA
/ INTB
GND
/ INTA
N.C.
pin
pin
DD
V
V
V
= 5.5 V
DD
DD
DD
Epson Toyocom
Epson Toyocom
Epson Toyocom
Epson Toyocom
= 5 V
= 3 V
RX
Min.
Min.
1.90
1.15
SON
5.0
8025 NB
T
T
4.8
a
a
Typ.
0.60
0.48
Typ.
2.10
1.30
22 pin
3.0
0.2
= 40 C to +85 C
= 30 C to +70 C
1.3
Max.
1.80
Max.
1.20
2.30
1.45
6.5
0.1
(Unit:mm)
22.
21.
20.
19.
18.
17.
16.
15.
14.
13.
12.
Unit
Unit
µA
µA
V
V
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.