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RTC-4574SA Datasheet, PDF (1/2 Pages) Epson ToYoCom – SERIAL-INTERFACE REAL TIME CLOCK MODULE | |||
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Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
RTC - 4574ï SAï /ï JEï /ï NB
ï·Built in frequency adjusted 32.768 kHz crystal unit.
ï·Interface Type
: 3-wire serial interface
ï·Operating voltage range
: 1.6ï Vï toï 5.5ï V
ï·Wide Timekeeper voltage range : 1.6ï Vï toï 5.5ï V
ï·Low backup current
: 0.5ï ïAï ï /ï ï 3ï Vï (ï Typ.ï )ï
ï·32.768 kHz frequency output function : C-MOS output With Control Pin
ï·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
ï Block diagramç
ç ç ç ï 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
ï·ï 32.768 kHz frequency output function
⢠FOUT pin output (C-MOS output ), CL=30 pF
⢠Output frequency selectable from1/30ï Hz to 32.768ï kHz
(32 Values)
ï·ï 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 itâs possible to output with /TIRQ pin output
(open-drain output).
⢠Selectable one time mode or repeat mode.
ï·ï 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 itâs possible to output with /AIRQ pin
output (open-drain output).
ïª Functions are compatible with RXï -ï 4574ï LC.
ï Terminal connectionï /ï External dimensionsç
(Unit:mm)ç
ï RTCï ïï 4574ï SA
ï RTCï ïï 4574ï JE
ï RTCï ïï 4574ï NB
1. GND
2. FOUT
3. N.C.
4. N.C.
5. N.C.
6. N.C.
7. VDD
5.0
7.4ï ï±ï 0.2
ï ï SOPï ïï 14 pin
14. FCON
13. CE1
12. DATA
11. CLK
10. /ï TIRQ
9. /ï AIRQ
8. CE0
1. VDD
2. FOUT
3. CE0
4. /ï AIRQ
5. /ï TIRQ
6. CLK
7. DATA
8. CE1
9. FCON
10. GND
5.4
6.0ï ï±ï 0.2
20.
19.
18.
17.
16.
15.
14.
1.5ï Max.ï ï ï 13.
12.
11.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
ï ï VSOJï ïï 20 pin
1. GND
2. FCON
3. N.C.
4. CE1
5. DATA
6. CLK
7. /ï TIRQ
8. /ï 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.
5.0ï ï±ï 0.2
15.
1.3ï ï±ï 0.1ï
14.
13.
12.
N.C.
N.C.
ï ïï
ï ïï
ï ï SONï ïï 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)
ïªï Refer to application manual for details.
ï®ï 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
ï®ï Frequency characteristics
Item
Symbol
Conditions
Frequency
tolerance
ïï fï /ï f
Taï =ï +25ï °C
VDDï =ï 3.0ï V
Oscillation
start-up time
tSTA
Taï =ï +25ï °C
VDDï =ï 1.6ï V
Rating
ï ï B: 5ï ï±ï 23ï ïª
Unit
ï´ï 10ï6
3ï ï Max.
s
ïªï Please ask for tighter tolerance.(Equivalent to 1 minute of monthly deviation)
ï®ï Current consumption characteristics
Item Symbol
Conditions
Min.
VDD
CE0,ï CE1ï =ï GND
IBK FOUTï ;output OFF
ï (ï Hiï -ï zï )
ï =ï 5ï V -
ï
VDD
ï =ï 3ï V -
Current
ï
Consumption
CE0ï =ï GND
VDD
CE1ï =ï VDD
ï =ï 5ï V -
ï
I32k FOUTï ;
VDD
32.768ï kHzoutput ON ï =ï 3ï V -
CLï =ï 30ï pF
ï
Taï =ï -40ï ï°Cï toï +85ï ï°C
Typ. Max. Unit
1.0 2.0
µA
0.5 1.0
8.0 20.0
µA
5.0 12.0
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