RTC-4574 Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (SPI-Bus)

Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
RTC - 4574SA/JE/NB
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: 3-wire serial interface
Operating voltage range
: 1.6Vto5.5V
Wide Timekeeper voltage range : 1.6Vto5.5V
Low backup current
: 0.5A/3V(Typ.)
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
Actual size
RTC-4574SA
Product Number (Please contact us)
RTC-4574SA : Q41457452000200
RTC-4574JE : Q41457471000100
RTC-4574NB : Q41457492000100
RTC-4574JE RTC-4574NB
 Block diagramç
ç ç ç Overviewç
ç
FOUT
FCON
/ TIRQ
/ AIRQ
DATA
CLK
CE 1
CE 0
32.768 kHz
OSC
DIVIDER
OUTPUT
CONTROLLER
INTERRUPTS
CONTROLLER
BUS
INTERFACE
CIRCUIT
CONTROL LINE
CLOCK and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
CONTROL
REGISTER
SHIFT REGISTER
32.768 kHz frequency 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/External dimensionsç
(Unit:mm)ç
RTC4574SA
RTC4574JE
RTC4574NB
1. GND
2. FOUT
3. N.C.
4. N.C.
5. N.C.
6. N.C.
7. VDD
5.0
7.40.2
SOP14 pin
14. FCON
13. CE1
12. DATA
11. CLK
10. /TIRQ
9. /AIRQ
8. CE0
1. VDD
2. FOUT
3. CE0
4. /AIRQ
5. /TIRQ
6. CLK
7. DATA
8. CE1
9. FCON
10. GND
5.4
6.00.2
20.
19.
18.
17.
16.
15.
14.
1.5Max. 13.
12.
11.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
VSOJ20 pin
1. GND
2. FCON
3. N.C.
4. CE1
5. DATA
6. CLK
7. /TIRQ
8. /AIRQ
9. CE0
10. FOUT
11. VDD
22. N.C.
21. N.C.
20. N.C.
19. N.C.
18. N.C.
17. N.C.
4.8
16. N.C.
5.00.2
15.
1.30.1
14.
13.
12.
N.C.
N.C.


SON22 pin
The metal case inside of the molding compound may be exposed on the top or bottom of this product. This purely cosmetic and does not have any effect on quality, reliability or electrical specs.
Specifications (characteristics)
Refer to application manual for details.
 Recommended Operating Conditions
Item
Symbol Conditions
Min. Typ. Max. Unit
Power voltage
VDD
-
1.6 3.0 5.5
V
Clock voltage
VCLK
-
1.6 3.0 5.5
V
Operating
temperature
TOPR
-
-40
+25 +85
°C
 Frequency characteristics
Item
Symbol
Conditions
Frequency
tolerance
f/f
Ta=+25°C
VDD=3.0V
Oscillation
start-up time
tSTA
Ta=+25°C
VDD=1.6V
Rating
B: 523
Unit
10^6
3Max.
s
 Please ask for tighter tolerance.(Equivalent to 1 minute of monthly deviation)
 Current consumption characteristics
Item Symbol
Conditions
Min.
VDD
CE0,CE1=GND
IBK _{FOUT;output OFF}
(Hi-z)
=5V -

VDD
=3V -
Current

Consumption
CE0=GND
VDD
CE1=VDD
=5V -

I32k _FOUT;
VDD
32.768kHzoutput ON _{=3V -}
CL=30pF

Ta=-40Cto+85C
Typ. Max. Unit
1.0 2.0
µA
0.5 1.0
8.0 20.0
µA
5.0 12.0