RTC-4543SA Datasheet, PDF (1/2 Pages) Epson ToYoCom – Simple Function SERIAL-INTERFACE REAL TIME CLOCK MODULE

Real time clock module
Epson Toyocom
Simple Function
SERIAL-INTERFACE REAL TIME CLOCK MODULE
Product Number (Please contact us)
RTC-4543SA : Q41454351000200
RTC-4543SB : Q41454361000200
RTC - 4543 SA / SB
•Built in frequency adjusted 32.768 kHz crystal unit.
•Interface type : 3-wire serial interface
•Operating voltage range : 2.5 V to 5.5 V
•Wide Timekeeper voltage range: 1.4 V to 5.5 V
•32.768 kHz frequency output function: C-MOS output With Control Pin
•The various functions include full calendar, timer, and low voltage detection.
Actual size
RTC-4543SA
RTC-4543SB
Block diagramç
32.768 kHz
OSC
DIVIDER
CLOCK AND CALENDAR
FOUT
FSEL
FOE
DATA
CLK
WR
CE
O UT PU T
CO NT ROL LER
I/ O
CONTROLLER
SHIFT REGISTER
VOLT AG E
DETECT
CONTROL
CIRCUIT
ç ç ç Overviewç
ç
• 32.768 kHz frequency output function
•FOUT pin output (C-MOS output ), CL=30 pF
•FOE pin enables output on/off control.
•FSEL pin enables output selectable 32.768 kHz or 1 Hz.
• Power supply voltage monitoring function
•Detection that power supply voltage des cended to 1.7 V or les s .
•Autom atic record to FDT-bit at the tim e of power supply
decline detection.
Pin Functionç
ç ç ç Terminal connection / External dimensionsç
(Unit:mm)ç
Signal Name Input / Output
Function
CE
CLK
Input
Input
The chip enabled input pin.
At the HIGH level, access becomes possible.
The shift clock input pin f or serial dat a transfer.
WR
Input
DATA pin input / output switching pin.
DATA Bi-directional The data input / output pin for serial data transfer.
FOUT
FOE
FSEL
VDD
O utput
Input
Input
-
32.768 kHz or 1Hz clock output pin
(C-MOS output).
High impedance at output off.
The input pin f or the FOUT output control.
Select t he frequency that is output from the
FOUT pin.
Connected to a positive power supply.
GND
-
Connected to a ground.
1. GND
2. N.C.
3. CE
4. FSEL
5. WR
6. FOE
7. N.C.
RTC − 4543 SA
14. FOUT
13. N.C.
5.0
7 .4 ± 0 .2
SOP − 14 pin
12. N.C.
11. DATA
10. CLK
9. VDD
8. N.C.
1. N.C.
2. N.C.
3. N.C.
4. N.C.
5. FOE
6. WR
7. FSEL
8. CE
9. GND
RTC − 4543 SB
18. N.C.
17. N.C.
16. N.C.
15. N.C.
14. VDD
5.4
13. N.C.
2.0 Max. _{12. CLK}
7.8 ± 0.2
11. DATA
10. FOUT
SOP − 18 pin
Specifications (characteristics)
Metal may be exposed on the top or bottom of this product. This w ill not affect any quality, reliability or electrical spec.
* Refer to application Manual for details.
! Recommended Operating Conditions
Item
Power voltage
Clock voltage
Operating
t emp erature
Sym bol
VDD
VCLK
TOPR
Condition
-
-
-
Min. Typ. Max.
2.5 5.0 5.5
1.4 5.0 5.5
-40 +25 +85
! Frequency characteristics
Item
Sym bol
Condition
Rating
Frequency
t ol erance
∆_f/f
Ta = +25 °C
VDD = 5.0 V
5 ± 23 ^∗
Oscillation
start-up time
tSTA
Ta = +25 °C
VDD = 2.5 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
Item
Sym bol
Condition
Ta = -40 °C to +85 °C
Min. Typ. Max. Unit
Current
C onsu mpti on
VDD
CE = GND
=5V
IBK
FOE = GND
VDD
FOUT ;output OFF ^{= 3 V}
(Hi-z)
VDD
=2V
1.5 3.0
1.0 2.0 µA
0.5 1.0
! Supply Voltage Detection Characteristic
Item
Symbol
Condition
Power supply
detection voltage
VDT
VDD pin
Ta = -40 °C to +85 °C
Min. Typ. Max. Unit
1.4 1.7 2.0 V
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