RTC-4701NB Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (SPI-Bus)

Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
Built-in Temperature Sensor
RTC - 4701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
Built-in temperature sensor
: Detects temperature.
Converts output to analog voltage
32.768 kHz frequency output function : C-MOS output With Control Pin
Function of time and calendar, the various interrupt function etc.
Product Number (Please contact us)
RTC-4701JE : Q41470171000200
RTC-4701NB: Q41470192000200
Actual size
RTC-4701JE
RTC-4701NB
Block diagramç
32.768 kHz
VTEMP
/ SOFF
OSC
Temperature
Sensor
DIVIDER
FOUT
FOE
/ AIRQ
/ TIRQ
DATA
CLK
CE
FOUT
CONTROLLER
INTERRUPTS
CONTROLLER
BUS
INTERFACE
CIRCUIT
ç ç ç Overviewç
ç
Control Line
CLOCK
and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
 Built-in temperature sensor
• Diode temperature sensor (analog voltage output)
Temperature sensor operating voltage:2.7Vto5.5V
Temperature sensor tolerance:5C(Ta=+25C)
 Voltage output (analog):-7.6mV/CTyp.
32.768 kHz frequency output function
• FOUT pin output (C-MOS output), CL=30 pF
• FOE pin enables output on/off control.
 The various interrupt function
• 12bit additional counter.(to4095 count)
• Timer function can be set up between
1/4096 second and 255 minutes.
• Alarm function can be set to day of week, hour, or minute.
Pin Functionç
ç ç ç Terminal connection/External dimensionsç
(Unit:mm)ç
Signal
Input /
Name Output
Function
CE
Input
The chip enabled input pin.
(Built -in pull-down resistance)
CLK
Input The shift clock input pin for serial data transfer.
DATA
Bi-directional
The data input / output pin for serial data
transfer.
FOUT Output
FOE
Input
FOE input
HIGH
LOW
FOUT output
32.768kHz output C-MOS output
output OFF
Hi - z
VTEMP
/SOFF
/AIRQ
/TIRQ
VDD
GND
Output
Input
Output
Output
-
-
The voltage output pin for the
temperature sensor (analog).
The input pin for the temperature sensor control.
Output 1 pin (N-ch open drain)
Output 2 pin (N-ch open drain)
Connected to a positive power supply.
Connected to a ground.
RTC4701JE
1. VDD
2. FOUT
3. CE
4. /AIRQ
5. /TIRQ
6. CLK
7. DATA
8. FOE
9. VTEMP
10. /SOFF
5.4
6.00.2
20.
19.
18.
17.
16.
15.
14.
1.5Max. 13.
12.
11.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GND
VSOJ20 pin
1. GND
2. /SOFF
3. VTEMP
4. FOE
5. DATA
6. CLK
7. /TIRQ
8. /AIRQ
9. CE
10. FOUT
11. VDD
RTC4701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.
.
Temperature sensor characteristics
*Refer to application manual for details.
Item
Temperature
output voltage
Output tolerance
Temperature
sensitivity
Linearity
Temperature
detection range
Output resistance
 If not specifically indicated, GND=0V,VDD=2.7V to5.5V,Ta=-40Cto+85C
Symbol
Conditions
Min. Typ. Max. Unit
VTEMP
TACR
VTEMP pin,Ta=+25C
GND based output voltage
Ta=+25C
-
1.480
-
V
-
-
5.0
C
VSE -40CTa+85C
-7.1
-7.6
-8.1 mV/C
NL -40CTa+85C
-
-
2.0
%
TSOP NL2.0%
-40
RO
VTEMP pin,Ta=+25C
GND standard and VDD standard
-
-
+85
C
1.0
3.0
k
 Temperature sensitivity VSE=(V(+85C)-V(-40C))/125[mV/C]
 Linearity
NL=
a
b
100[%]
a : Maximum deviation between the measured value of
VTEMP and approximate straight line.
b : Difference between the measured values at
-40 C and +85 C.
 Output resistance(Ro) Ro=
V1
1
[]
Output voltage
VTEMP [ V ]
a
V (-40 C )
Approximate
straight line
b
a
Measured value
a
V(+85 C )
Ta
-40
0
+85
Temperature
[C]