RX-4045SA Datasheet, PDF (1/2 Pages) Epson Company – 4-wire serial interface high-stability RTC module

Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
High-Stability Frequency
RX-4045SA/NB
Built-in 32.768 kHz crystal unit : Frequency adjusted for high accuracy.
 (510^6/Ta=+25C)
Interface Type
: 4-wire serial interface
Operating voltage range
: 1.7Vto5.5V
Wide Timekeeper voltage range : 1.15Vto5.5V
Various detection Functions
: Oscillation stop detection function etc.
Low backup current
: 0.48A/3V(Typ.)
32.768 kHz clock frequency output : N-ch open drain output
Function of time and calendar, the various detection function,
and interrupt function etc.
Actual size
RX-4045SA
Product Number (Please contact us)
RX-4045SA : Q41404552xxxx00
RX-4045NB : Q41404592xxxx00
RX-4045NB
Block diagramç
ç ç ç Overviewç
ç
FOUT
/INT
32kHz
OUTPUT
CONTROL
DIVIDER
OSC CORREC
DIV
-TION
COMPARATOR_W
ALARM_W REGISTER
(MIN,HOUR, WEEK)
COMPARATOR_D
ALARM_D REGISTER
(MIN,HOUR)
TIME COUNTER
(SEC,MIN,HOUR,WEEK,DAY,MONTH,YEAR)
VOLTAGE
DETECT
OSC
DETECT
ADDRESS
DECODER
ADDRESS
REGISTER
I/O
CONTROL
INTERRUPT CONTROL
SHIFT REGISTER
VDD
GND
CLK
DI
DO
CE
 Features built-in 32.768kHz crystal unit
▪Frequency adjusted forhigh accuracy
(510^6 /Ta=+25C)
(Equivalent to 13 seconds of monthly deviation)
 The various detection Function
▪Power supply voltage monitoring function
(with selectable detection threshold)
▪Stop detection function
▪Power-on reset detection function
Equipped with alarm and timer
▪Timer function produces a periodic interruption signal.
As for the Alarm function an optional combination is
produced. (Date of the week , time , minute)
Pin functionç
ç ç ç Terminal connection/External dimensionsç
(Unit:mm)ç
Signal
Name
CE
CLK
DI
DO
FOUT
/ INT
TEST
VDD
GND
Input /
Output
Input
Input
Input
Output
Output
Output
-
-
-
Function
The chip enabled input pin.
( built -in pull-down resistance )
At the "H"level, access becomes possible.
The shift clock input pin for serial data transfer.
The data input pin for serial data transfer.
The data output pin for serial data transfer.
32.768kHzclock output pin with the output control
function (N-ch open drain)
High impedance at the time of output off.
Interrupt output (N-ch open drain)
Used by the manufacturer for testing.
(Do not connect externally.)
Connected to a positive power supply.
Connected to a ground.
1. N.C.
2. CLK
3. FOUT
4. N.C.
5. TEST
6. VDD
7. CE
RX4045SA
5.0
7.40.2
SOP14 pin
14. N.C.
13. DO
12. DI
11. GND
10. /INT
9. N.C.
8. N.C.
1. CE
2. VDD
3. (GND)
4. TEST
5. FOUT
6. CLK
7. DO
8. DI
9. GND
10. /INT
11. N.C.
RX4045NB
4.8
5.00.2
22.
21.
20.
19.
18.
17.
16.
15.
1.30.1 _14.
13.
12.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.


SON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)
 Recommended Operating Conditions
Item
Symbol Conditions
Min. Typ. Max.
Power voltage
Clock voltage
Operating
temperature
VDD
VCLK
TOPR
-
1.7 3.0
5.5
-
1.15 3.0
5.5
-
-40 +25 +85
 Frequency characteristics
Item
Symbol
Conditions
Rating
Frequency
tolerance
Oscillation
start-up time
Frequency / voltage
characteristics
f/f
tSTA
f/V
Ta=+25°C
VDD=3.0V
Ta=+25°C
VDD=2.0V
Ta=+25°C
VDD=2.0Vto5.5V
AA: 55^1)
AC: 05^2)
1Max.
1Max.
1)2) Equivalent to 13 seconds of monthly deviation (excluding offset.)
Unit
V
V
C
Unit
10^6
s
10^6
 Refer to application manual for details.
 Current consumption characteristics
Item
Symbol
Conditions
Min.
CE=GND
VDD
=5V
-
Current
Consumption
IBK
FOUT;output OFF
(Hi-z)
VDD
=3V
-
I32k
CE=GND
VDD
FOUT;32.768kHz _{=3Vï€} 
-
output ON
 Power supply detection voltage
Item
Symbol Conditions Min.
High-voltage mode
VDETH
VDD pin
1.90
Low-voltage mode
VDETL
VDD pin
1.15
Ta=-40Cto+85C
Typ. Max. Unit
0.60 1.80
µA
0.48 1.20
0.65 2.00 µA
Ta=-30Cto+70C
Typ. Max. Unit
2.10 2.30 V
1.30 1.45 V