RTC4574NB Datasheet PDF - Epson


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RTC4574NB
Epson

Part Number RTC4574NB
Description Serial Interface Real Time Clock Module
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Real time clock module
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RTC - 4574 SA / JE / NB
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: Serial interface in 3 lines form.
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.
Lead(Pb)-free : Contains high melting temperature type solder
(Pb85 %) exempted by RoHS directive.
Actual size
RTC-4574SA
RTC-4574JE
www.DataSheet4U.com
RTC-4574NB
Block diagram
32.768 kHz
OSC
DIVIDER
FOUT
FCON
/ TIRQ
/ AIRQ
DATA
CLK
CE 1
CE 0
OUTPUT
CONTROLLER
INTERRUPTS
CONTROLLER
BUS
INTERFACE
CIRCUIT
CONTROL LINE
CLOCK and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
CONTROL
REGISTER
SHIFT REGISTER
Overview
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 upbetween 1/4096 second and
255 minutes.
• It is recorded automatic to TF-bit at the time of event
occurrence,and 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 automatic to AF-bit at the time of event
occurrence,and possible to output with /AIRQ pin
output (open-drain output).
Functions are compatible with RX - 4574 LC.
Terminal connection / External dimensions
(Unit:mm)
1. GND
2. FOUT
3. N.C.
4. N.C.
5. N.C.
6. N.C.
7. VDD
RTC 4574 SA
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
20. N.C.
19. N.C.
18. N.C.
17. N.C.
16. N.C.
15. N.C.
5.4 14. N.C.
1.5 Max. 13. N.C.
12. N.C.
6.0 ± 0.2
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 will not affect any quality, reliability or electrical spec.
4.8
5.0 ± 0.2
1.3 ± 0.1
22.
21.
20.
19.
18.
17.
16.
15.
14.
13.
12.
SON 22 pin
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
Specifications (characteristics)
Refer to application manual for details.
„ Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
temperature
Symbol
VDD
VCLK
TOPR
Condition
-
-
-
Min. Typ. Max. Unit
1.6 3.0 5.5
1.6 3.0 5.5
V
V
40 +25 +85
°C
„ Frequency characteristics
Item Symbol
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
× 106
s
„ DC characteristics
Item Symbol
Condition
CE0, CE1 = GND
IBK FOUT ;output OFF
( Hi - z )
Current
Consumption
CE0 = GND
CE1 = VDD
I32k FOUT ;
32.768 kHzoutput ON
CL = 30 pF
Min.
VDD
=5V
VDD
=3V
VDD
=5V
VDD
=3V
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
112 http://www.epsontoyocom.co.jp




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