RTC-4574SA Datasheet, PDF (1/2 Pages) Epson ToYoCom – SERIAL-INTERFACE REAL TIME CLOCK MODULE

Real time clock module
Epson Toyocom
SERIAL-INTERFACE REAL TIME CLOCK MODULE
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 µA / 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 : Q41457451000200
RTC-4574JE : Q41457471000100
RTC-4574NB : Q41457491000100
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 s electable from 1/30 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 tim e 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 s et to any com bination of day of week,
hour, or minute.
• It is recorded automatically to AF-bit at the tim e 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
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
RTC − 4574 JE
RTC − 4574 NB
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
1.5 Max.
20. N.C.
19. N.C.
18. N.C.
17. N.C.
16. N.C.
15. N.C.
14. N.C.
13. N.C.
12. N.C.
11. N.C.
1. GND
2. FCON
3. N.C.
4. CE1
5. DATA
6. CLK
7. / TIRQ
8. / AIRQ
9. CE0
10. FOUT
11. VDD
VSOJ − 20 pin
Metal may be exposed on the top or bottom of this product. This w ill not affect any quality, reliability or electrical spec.
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.
5.0 ± 0. 2
13. −
12. −
SON − 22 pin
Specifications (characteristics)
∗ Refer to application manual for details.
! Recommended Operating Conditions
Item
Symbol Condition
Min.
Power voltage
VDD
-
1.6
Clock voltage
VCLK
-
1.6
Op er ati ng
tem perature
TOPR
-
−40
Typ. Max.
3.0 5.5
3.0 5.5
+25 +85
! Frequency characteristics
Item
Sym bol
Condition
Rating
Frequency
tolerance
∆_f/f
Ta = +25 °C
VDD = 3.0 V
5 ± 23 ^∗
Oscillation
start-up time
tSTA
Ta = +25 °C
VDD = 1.6 V
3 Max.
∗ Please ask for tighter tolerance.(Equivalent to 1 minute of monthly deviation)
Unit
V
V
°C
Unit
× ₁₀^−6
s
! Current consumption characteristics
T a = -40 °C to +85 °C
Item
Symbol
Condition
Min. Typ. Max. Unit
Current
C onsu mpti on
CE0, CE1 = GND
IBK _{FOUT ;output OFF}
( Hi - z )
VD D
=5V
VD D
=3V
CE0 = GND
CE1 = VDD
VD D
=5V
I32k _{FOUT ;}
VD D
32.768 kHzoutput ON _{= 3 V}
CL = 30 pF
1.0 2.0
µA
0.5 1.0
8.0 20.0
µA
5.0 12.0
http://www.epsontoyocom.co.jp