Actual size
http://www.epsontoyocom.co.jp
Real time clock module
Real time clock moduleReal time clock module
Real time clock module
Epson Toyocom
Eps o n To yo co mEps o n To yo co m
Eps o n To yo co m
Block diagram
Overview
BUS
INTERFACE
CIRCUIT
CE 1
CLK
DATA
32.768 kHz
CE 0
CONTROL
REGISTER
SHIFT REGISTER
ALARM REGISTER
TIMER REGISTER
CLOCK a nd
CALENDAR
INTERRUPTS
CONTROLLER
OUTPUT
CONTROLLER
DIVIDER
CONTROL LINE
FOUT
/ TIRQ
/ AIRQ
OSC
FCON
•
••
•
32.768 kHz frequ ency output function
• FOUT pin output (C-MOS output ), CL=30 pF
• Output frequency selectable from1/30 Hz to 32.768 kHz
(32 Values)
•
••
•
Timer function
• Timer function can be set up between 1/4096 second and
255 minutes.
• It is recorded automatically to TF-bit at the time of event
occurrence, and it’s possible to output with /TIRQ pin output
(open-drain output).
• Selectable one time mode or repeat mode.
•
••
•
Alarm function
• Alarm function can be set to any combination of day of week,
hour, or minute.
• It is recorded automatically to AF-bit at the time of event
occurrence, and it’s possible to output with /AIRQ pin
output (open-drain output).
∗
∗∗
∗ Functions are compatible with RX
-
4574
LC.
Terminal connection
/
Exte r na l dim ensions
(
Unit:mm
)
RTC − 4574 SA
1. GND 14. FCON
2. FOUT 13. CE1
3. N.C. 12. DATA
4. N.C. 11. CLK
5. N.C. 10. / TIRQ
6. N.C. 9. / AIRQ
7. V
DD
10.1
± 0.2
5.0
7.4
± 0.2
3.2
± 0.1
1.27
8. CE0
SOP − 14 pin
RTC − 4574 JE
1. V
DD
20. N.C.
2. FOUT 19. N.C.
3. CE0 18. N.C.
4. / AIRQ 17. N.C.
5. / TIRQ 16. N.C.
6. CLK 15. N.C.
7. DATA 14. N.C.
8. CE1 13. N.C.
9. FCON 12. N.C.
10. GND
7.0
± 0.3
5.4
6.0
± 0.2
1.5
Max.
0.65
11. N.C.
VSOJ − 20 pin
RTC − 4574 NB
1. GND 22. N.C.
2. FCON 21. N.C.
3. N.C. 20. N.C.
4. CE1 19. N.C.
5. DATA 18. N.C.
6. CLK 17. N.C.
7. / TIRQ 16. N.C.
8. / AIRQ 15. N.C.
9. CE0 14. N.C.
10. FOUT 13. −
11. V
DD
4.8
6.3
Max.
5.0
± 0.2
0.5
1.3
± 0.1
12. −
SON − 22 pin
Metal m ay b e exposed on the top or bottom of thi s produ ct . Th i s will not affect any quali ty, reli abil ity or electrical sp ec.
S
p
ecifications
(
characteristics
)
∗Refer to a
lic ation m anu al for det ail s.
Recommended Operating Conditions
Item Symbol Condition Min. Typ. Max. Unit
Power voltage V
DD
-
1.6 3.0 5.5 V
Cl oc k voltag e V
CLK
-
1.6 3.0 5.5 V
Operating
temperature T
OPR
-
−40 +25 +85 °C
Frequency characteristics
Item Symbol Condition Rating Unit
Frequency
tolerance ∆ f / f T
a
= +25 °C
V
DD
= 3.0 V 5 ± 23 ∗
× 10
−6
Oscillation
start-up time
t
STA
T
a
= +25 °C
V
DD
= 1.6 V 3 Max. s
∗ Please ask for tighter tolerance.(Equivalent to 1 minute of monthly deviation)
Current consumption characteristics
T
a
= -40 °C to +85 °C
Item Symbol Condition Min. Typ. Max. Unit
V
DD
= 5 V
1.0 2.0
I
BK
CE0, CE1 = GND
FOUT ;output OFF
( Hi - z ) V
DD
= 3 V
0.5 1.0
µA
V
DD
= 5 V
8.0 20.0
Current
Consumption
I
32k
CE0 = GND
CE1 = V
DD
FOUT ;
32.768 kH z outp ut ON
CL = 30 pF
V
DD
= 3 V
5.0 12.0
µA
SERIAL- I NTERFACE REAL T I M E CLOCK MODULE
RTC
-
4574
SA
/
JE
/
NB
•
Built in frequency adjusted 32.768 kHz crystal unit.
•
Interfac e Type
:
3-wire serial interface
•
Operating voltage range
:
1.6
V
to
5.5
V
•
Wide Tim ekeeper volt ag e r an g e
:
1.6
V
to
5.5
V
•
Low bac kup current
:
0.5
µ
A
/
3
V
(
Typ.
)
•
32.768 kHz frequency output function
:
C-MOS output With Control Pin
•
T h e vari ous func ti ons inc l ud e ful l c al end ar, al arm, ti m er.
RTC-4574JE RTC-4574NB
RTC-4574SA
Product Number (Please contact us)
RTC- 4 5 74SA : Q414 57 451 00 02 00
RTC-4574JE : Q41457471000100
RTC-4574NB : Q41457491000100