RTC-4543 Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (SPI-Bus)

Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
Simple Function
Product Number (Please contact us)
RTC-4543SA : Q41454352000200
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
OUTPUT
CONTROLLER
I/O
CONTROLLER
SHIFT REGISTER
VOLTAGE
DETECT
CONTROL
CIRCUIT
ç ç ç Overviewç
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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 descended to 1.7 V or less.
•Automatic record to FDT-bit at the time 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 for serial data transfer.
WR
Input
DATA pin input / output switching pin.
DATA
FOUT
FOE
FSEL
VDD
Bi-directional The data input / output pin for serial data transfer.
Output
Input
32.768kHzor 1Hz clock output pin
(C-MOS output).
High impedance at output off.
The input pin for the FOUT output control.
Input
-
Select the 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.
12. N.C.
11. DATA
5.0
10. CLK
9. VDD
7.40.2
8. N.C.
SOP14 pin
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)
 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.
* Refer to application Manual for details.
 Recommended Operating Conditions
Item
Symbol Conditions
Min. Typ. Max.
Power voltage
VDD
-
2.5 5.0 5.5
Clock voltage
VCLK
-
1.4 5.0 5.5
Operating
temperature
TOPR
-
-40 +25 +85
 Frequency characteristics
Item
Symbol
Conditions
Rating
Frequency
tolerance
Oscillation
start-up time
f/f
tSTA
Ta=+25°C
VDD=5.0V
Ta=+25°C
VDD=2.5V
B: 523
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
Symbol
Conditions
Ta=-40Cto+85C
Min. Typ. Max. Unit
Current
Consumption
CE=GND
VDD
=5V
-
IBK
FOE=GND
VDD
FOUT;output OFF ^{=3Vï€} 
-
(Hi-z)
VDD
=2V
-
1.5 3.0
1.0 2.0 µA
0.5 1.0
 Supply Voltage Detection Characteristic
Item
Symbol
Conditions
Power supply
detection voltage
VDT
VDD pin
Ta=-40Cto+85C
Min. Typ. Max. Unit
1.4 1.7 2.0 V