RX-4571LC Datasheet, PDF (1/2 Pages) Epson ToYoCom – LOW BACKUP VOLTAGE SERIAL-INTERFACE REAL TIME CLOCK MODULE

Real time clock module
LOW BACKUP VOLTAGE
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RX - 4571 LC / NB / SA
•Built in freque ncy adjusted 32 .768 kHz crysta l unit.
•Interface Type
: 3-wire serial i nte rface
•Operating vo ltage ra nge
: 1.6 V to 5.5 V
•Wide Timekeeper vo ltage ra nge : 1.0 V to 5.5 V / Ta = +25 °C
•Low backup curre nt
: 0.32 µA ( Typ. ) / 3 V
•32.768 kHz frequency output function : C-MOS output With Control Pin
•Real-time clock function
Clock/cale ndar function, a uto leap yea r correction functio n,
alarm i nte rrupt functio n, etc.
Actual size
RX-4571LC
Epson Toyocom
Product Number (Please contact us)
RX-4571LC : Q414571C1000100
RX-4571NB : Q41457191000100
RX-4571SA : Q41457151000100
RX-4571NB
RX-4571SA
Block diagramç
FOUT
FOE
/ IRQ
DIO
CLK
CE
32.768 kHz
OSC
DIVIDER
FOUT
CONTROLLER
INTERRUPTS
CONTROLLER
BUS
INT ER FAC E
CIRCUIT
ç ç ç Overviewç
ç
CONTROL LINE
CLOCK and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
CONT ROL
REGISTER
and
SYST EM
CONTROLLER
• 32.768 kHz frequency output function
• FOUT pin output ( C-MOS output ) , CL=30 pF
• Timer function
• Timer function which can be set up between
1/4096 second and 4095 minutes.
• Alarm function
• Alarm function can be set to any combination of day,
day of week, hour, or minute.
• Pin Function
Signal
Name
CE
CLK
DIO
Input / Output
Input
Input
Bi- direct ional
Function
The chip enabled input pin 0.
( It has a built -in pull-down resistance )
The shift clock input pin for serial data transfer.
The data input / output pin for serial data transfer.
FOUT
FOE
Output
Input
32.768 kHz clock output pin with the output control
function. ( C-MOS )
FOE pin control the condition of FOUT with
FSEL1-bit, FSEL0-bit, etc.
/ IRQ
VDD
Output
-
Interrupt output ( N-ch open drain )
Connected to a positive power supply.
GND
-
Connected to a ground.
Terminal connection / External dimensionsç
(Unit:mm)ç
RX − 4571 LC
RX − 4571 NB
RX − 4571 SA
1. FOE
2. N.C.
3. DIO
4. CLK
5. CE
6. GND
2.4
2.8
VSOJ − 12pin
12. VDD
11. N.C.
10. N.C.
9. N.C.
8. /IRQ
1. FOE
2. DIO
3. (GND)
4. CLK
5. CE
6. GND
7. N.C.
8. N.C.
9. FOUT
22. N.C.
21. N.C.
20. N.C.
19. N.C.
18. N.C.
17. N.C.
4.8
16. N.C.
15. N.C.
1.3 ± 0.1
14. N.C.
1. GND
2. N.C.
3. CE
4. CLK
5. DIO
6. N.C.
7. FOUT
10. /IRQ
11. VDD
5.0 ± 0.2
13. −
12. −
7. FOE
SON − 22 pin
Metal may be exposed on the top or bottom of this product. This w ill not affect any quality, reliability or electrical spec.
5.0
7.4 ± 0.2
SOP - 14 pin
14. FOUT
13. N.C.
12. N.C.
11. N.C.
10. / IRQ
9. N.C.
8. VDD
Specifications (characteristics)
∗ Refer to application manual for details.
! Recommended Operating Conditions
Item
Symbol
Condition
Min. Typ. Max. Unit
Power voltage
VDD
−
1.6
3.0
5.5
V
Clock voltage
VCLK
Ta = +25 °C
Ta = −40 to +85 °C
1.0
1.1
3.0
3.0
5.5
5.5
V
V
Operating
temperature
TOPR
−
−40 +25 +85
°C
! Frequency characteristics
Item
Symbol
Condition
Rating
Frequency
tolerance
Oscillation
start-up time
∆f/f
tSTA
Ta = +25 °C
VDD = 3.0 V
Ta = +25 °C
VDD = 1.6 V
5 ± 23 *
1 Max.
* Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)
Unit
× 10 ^−6
s
! Current consumption characteristics
Symbol
Condition
Min.
CE = GND
VDD
/IRQ = OFF
=5V
IBK
FOUT ;
VDD
output OFF ( Hi - z ) _{= 3 V}
CE = GND
/IRQ = OFF
VDD
=5V
I32k
FOUT ;
32.768 kHz output _VDD
ON
=3V
CL = 30 pF
Ta = −40 °C to +85 °C
Typ. Max. Unit
0.40 1.00
µA
0.32 0.95
8.0 14.0
µA
5.0
8.5
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