Real time clock module
Epson Toyocom
Product Number (Please contact us)
RTC-4701JE : Q41470171000200
RTC-4701NB: Q41470191000200
Built-in Temperature Sensor
SERIAL-INTER FACE REA L TIME C LOCK MODULE
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.
Actual size
RTC-4701JE
RTC-4701NB
Block diagram
32.768 kHz
Control Line
Overview
•
Built-in temperature sensor
• Diode temperature sensor (analog voltage output)
OSC
DIVIDER
CLOCK
and
VTEMP
/ SOFF
Temperature
Sensor
∗
temperature sensor operating voltage : 2.7 V to 5.5 V
∗
temperature sensor tolerance :
±
5
°C
( T
a
= +25
°C
)
∗
voltage output (analog):
−7.6
mV /
°C
Typ.
CALENDAR
•
32.768 kHz frequency output function
FOUT
CONTROLLER
TIMER
REGISTER
FOUT
FOE
• 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.
/ AIRQ
/ TIRQ
INTERRUPTS
CONTROLLER
ALARM
REGISTER
DATA
CLK
CE
BUS
INTERFACE
CIRCUIT
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
Pin Function
Signal
Name
Input /
Output
Function
The chip enabled input pin.
CE
Input
(Built -in pull-down resistance)
CLK
Input
The shift clock input pin for serial data transfer.
The data input / output pin for serial data
DATA Bi-directional
transfer.
FOUT
FOE
VTEMP
/SOFF
/ AIRQ
/ TIRQ
V
DD
GND
Output
Input
Output
Input
Output
Output
-
-
FOE input
HIGH
LOW
FOUT output
32.768 kHz output
output OFF
∗
C-MOS output
∗
Hi - z
Terminal connection / External dimensions
RTC
−
4701 JE
0.65
(Unit:mm)
RTC
−
4701 NB
20.
19.
7.0
±
0.3
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
V
DD
FOUT
CE
/ AIRQ
/ TIRQ
CLK
DATA
FOE
VTEMP
/ SOFF
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GND
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
GND
0.5
22.
21.
6.3
Max.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
−
−
/ SOFF
VTEMP
FOE
DATA
CLK
/ TIRQ
/ AIRQ
CE
FOUT
V
DD
18.
17.
16.
15.
20.
19.
18.
17.
5.4
1.5
Max .
6.0
±
0.2
4.8
1.3
±
0.1
14.
13.
12.
11.
16.
15.
14.
13.
12.
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.
5.0
±
0.2
VSOJ
−
20 pin
SON
−
22 pin
Metal may be exposed on the top or bottom of this product. This w ill not affect any quality, reliability or electrical spec.
Temperature sensor characteristics
∗
If not specifically indicated, GND = 0 V , V
DD
= 2.7 V to 5.5 V , T
a
=
−
40
°
C to +85
°
C
Output voltage
*
Refer to application manual for details.
VTEMP [ V ]
a
V (
−
40
°
C )
Item
Temperature
output voltage
Output tolerance
Temperature
sensitivity
Linearity
Temperature
detection range
Output resistance
Symbol
V
TEMP
T
ACR
V
SE
∆
NL
T
SOP
R
O
Condition
VTEMP pin, T
a
= +25
°
C
GND based output voltage
T
a
= +25
°
C
-40
°
C
≤
T
a
≤
+85
°
C
-40
°
C
≤
T
a
≤
+85
°
C
∆
NL
≤ ±
2.0 %
VTEMP pin, T
a
= +25
°
C
GND standard and V
DD
standard
Min.
Typ.
1.480
Max.
±
5.0
Unit
V
°
C
mV /
°
C
%
°
C
k
Ω
b
-7.1
-7.6
-8.1
±
2.0
Approximate
straight line
a
Measured
−
40
1.0
+ 85
3.0
∗
Temperature sensitivity
∗
Linearity
∗
Output resistance ( Ro )
V
SE
= ( V ( +85
°
C )
−
V (
−
40
°
C ) ) / 125 [ mV /
°
C ]
∆
NL =
a
V(+85
°
C )
Ta
[
°
C]
a
b
∆
∆
V
Ι
1
1
×
100 [ % ]
[
Ω
]
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.
−
40
0
Temperature
+85
Ro =
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