75
Real time clock module
Absolute Max. rating
Specifications (characteristics)
Operating range
Frequency characteristics
DC characteristics
External dimensions
(Unit: mm)
Terminal connection
6.3 Max.
4.8
5.0
0.2
1.3
0.5
0.2
#1
#11
#14
#22
No.
1
2
3
4
5
6
7
8
9
10
11
Pin terminal
GND
CE1
CEO
DI
DO
CLK
TIRQ
AIRQ
FOE
F
OUT
V
DD
No.
22
21
20
19
18
17
16
15
14
13
12
Pin terminal
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
--
--
0.1
(V
DD
=1.6 V to 5.5 V,Ta=-40
C to +85
C)
RX-4581NB
RX-4581NB
(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.
R4581
1234A
E
SERIAL REAL TIME CLOCK MODULE WITH SRAM
RX- 4581NB
Item
Power voltage
Clock voltage
Operating temperature
Symbol
V
DD
V
CLK
V
OPR
Condition
--
--
No condensation
Min.
1.6
-40
Max.
5.5
+85
Unit
V
C
Item
Frequency tolerance
Oscillation start up time
Frequency temperature
characteristics
Frequency voltage characteristics
Aging
Symbol
f/fo
t
STA
T
op
f/V
fa
Condition
Ta=+25 C, V
DD
=3 V
Ta=+25 C,V
DD
=3.0 V
Ta=-10 to +70 C,
Reference at +25 C
Ta=+25 C,V
DD
=2.0 V to 5.0 V
Ta=+25 C, V
DD
=3 V, first year
Range
3 Max.
+10
-120
2 Max.
5 Max.
Unit
x 10
-6
s
x 10
-6
x 10
-6
/V
x 10
-6
/year
Item
Standby current 1
Standby current 2
Input voltage
Input leakage current
Pulldown R1
Pulldown R2
Output voltage 1
Output voltage 2
Output leakage current
Symbol
I
DD1
I
DD2
V
IH
V
IL
I
LK
R
DWN1
R
DWN2
V
OH1
V
OH2
V
OH3
V
OL1
V
OL2
V
OL3
V
OL4
V
OL5
I
OZ
V
DD
=5 V
V
DD
=3 V
V
DD
=5 V
V
DD
=3 V
V
DD
=5 V
V
DD
=3 V
V
DD
=5 V
V
DD
=3 V
V
DD
=5 V
V
DD
=3 V
CEO,CE1,FOE=GND
AIRQ,TIRQ=V
DD
32.768 kHz output is OFF.
Condition
I
OH
=-
1 mA
DO,F
OUT
pins
I
OL
=
1 mA
AIRQ, TIRQ pins
I
OL
=
1 mA
DO,F
OUT
pins
Min.
--
0.8V
DD
GND-0.3
-0.5
75
150
4.5
2.0
2.9
GND
-0.5
Typ.
0.6
0.4
--
150
300
--
Max.
1.2
0.8
V
DD
+0.3
0.2V
DD
0.5
300
600
5.0
3.0
GND+0.5
GND+0.8
GND+0.1
GND+0.25
GND+0.4
0.5
Unit
A
V
A
k
V
A
Built in frequency adjusted 32.768 kHz crystal unit.
Include 128 bit (8 bit
x
16)RAM
Serial interface which can be controlled by 4 or 3 signal lines.
Alarm and Timer IRQ function are Available.
32.768 kHz clock frequency output.
Automatic adjustment for leap year.
Low backup current : 0.4 A /3 V(Typ.)
Wide operating voltage range : 1.6 V to 5.5 V
Actual size
V
out
=GND or V
DD
AIRQ, TIRQ, F
OUT
Pins
Item
Supply voltage
Input voltage
Output voltage
Storage temperature
Symbol
V
DD
V
IN
V
OUT1
V
OUT2
T
STG
Condition
V
DD
to GND
Input Pin
F
OUT,
DO
TIRQ
____
,AIRQ
____
Stored as bare product
after unpacking
Min.
-0.3
GND-0.3
-55
Max.
+7.0
V
DD
+0.3
V
DD
+0.3
+8.0
+125
Unit
V
C
CEO pins
V
IN
=V
DD
I
OL
=
100
A
DO,F
OUT
pins
I
OH
=-
100
A
DO,F
OUT
pins
523
CEO , CE1 , DI
CLK , FOE
CE1 , DI , CLK , FOE
V
IN
=V
DD
or GND
http://www.epsondevice.com
Product number (please refer to page 2)
Q4 1 4 5 8 1 9 x 0 0 0 4 0 0
The details are mentioned in the application manual.
Please ask tighter tolerance
76
Real time clock module
AC characteristics
BANK1
BANK0
BANK1
Block diagram
Register table
Timing chart
If not specifically indicated, GND=0, Ta=-40
C to +85
C
Item
CLK clock cycle
CLK H Pulse Width
CLK L Pulse Width
CLK L rise and fall time
CLK setup time
CE setup time
CE hold time
CE recovery time
CE enable time
Write data setup time
Write data hold time
Read data delay time
DO output switching time
DO output disable time
DI/DO conflict avoiding time
FOUT duty
Symbol
t
CLK
t
WH
t
WL
t
RF
t
CLKS
t
CS
t
CH
t
CR
t
WCE
t
DS
t
DH
t
RD
t
ZR
t
RZ
t
ZZ
t
W/t
Condition
C
L
=50 pF
C
L
=50 pF
R
L
=10 k
50% V
DD
level
Min.
500
250
250
0
200
200
300
100
100
0
40
Max.
100
0.95
200
50
200
60
Min.
350
175
175
0
150
100
200
50
50
0
40
Max.
50
0.95
150
20
100
60
Unit
ns
ns
ns
ns
ns
ns
ns
ns
s
ns
ns
ns
ns
ns
ns
%
V
DD
=3.0 V
10 % V
DD
=5.0 V
10 %
CE
t
WCE
t
RF
80%
20%
t
CLK
t
WL
t
WH
t
CH
t
CR
t
RZ
t
RD
t
ZZ
A0
M2
M3
t
DH
t
DS
Hi-z
Hi-Z
t
ZR
D7
D6
D0
D0
D6
D7
AO
M2
M3
t
RF
t
CS
t
CLKS
CLK
Read
DI
DO
Write
DI
DO
DIVIDER
FOUT
CONTROLLER
INTERRUPTS
CONTROLLER
BUS
INTERFACE
CIRCUIT
RAM 128bit (8 bit X 16)
32.768 kHz
OSC
CLOCK
and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
FOUT
FOE
/AIRQ
/TIRQ
DI
DO
CLK
CE1
CE0
Address
Register symbol
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Sec
Min
Hour
Day of Week
Day
Month
Year
RAM
Minutes Alarm
Hours Alarm
Day of week Alarm
Timer Countor 0
Timer Countor 1
Extension Register
Frag Register
Control Register
bit 7
80
AE
AE
AE
128
TEST
bit 6
40
40
6
40
40
6
64
WADA
bit 5
20
20
20
5
20
20
20
20
5
20
32
USEL
UF
UIE
bit 4
10
10
10
4
10
10
10
10
10
4
10
16
TE
TF
TIE
bit 3
8
8
8
3
8
8
8
8
8
3
8
8
2048
AF
AIE
bit 2
4
4
4
2
4
4
4
4
4
2
4
4
1024
bit 1
2
2
2
1
2
2
2
2
2
1
2
2
512
TSEL 1
VLF
STOP
bit 0
1
1
1
0
1
1
1
1
1
0
1
1
256
TSEL 0
RESET
Address
Register symbol
0
1
2
D
E
F
RAM 0
RAM 1
RAM 2
RAM D
RAM E
RAM F
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
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