Real time clock module
Epson Toyocom
Product Number (Please contact us)
RTC-9701JE : Q41970171000100
Built-in EEPROM
SERIAL-INTER FACE REA L TIME C LOCK MODULE
RTC - 9701 JE
•Built in frequency adjusted 32.768
•Interface Type
•Operating voltage range
•Wide Timekeeper voltage range
•Include EEPROM
•Various detection Functions
kHz crystal unit.
: 4-wire serial interface
: 2.7 V to 3.6 V
: 1.8 V to 5.5 V
: 4 kbit ( 256 × 16 bit )
: Ex.Power supply voltage
monitoring function
•32.768 kHz frequency output function : C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer.
Actual size
Block diagram
Overview
• Include EEPROM
Control Line
32.768 kHz
OSC
•4 kbit ( 256 × 16 bit ) User Memory.
CLOCK
and
CALENDAR
DIVIDER
FOUT
FOUT
CONTROLLER
FOE
/ TIRQ
CONTROLLER
VDD
Vi
• Interface Type
ALARM
REGISTER
•Serial interface in 4 lines form.
∗ It is possible to make it to 3 lines by
wired-OR connecting DI and DO pins.
CONTROL
REGISTER
VLF
VDD2
•VEX input pin : Power supply voltage monitoring function
•VDD2 pin : Low voltage detection function
•Oscillation circuit : Low voltage detection function
TIMER
REGISTER
INTERRUPTS
/ AIRQ
• The various Power supply voltage monitoring function
Vo
• 32.768 kHz frequency output function
VEX
•FOUT pin output (C-MOS output)
•FOE pin enables output on/off control.
GND
DO
• The various interrupt function
BUS
EEPROM
INTERFACE
DI
256 × 16 bit
CLK
•Alarm interrupt function,
Time-update interrupt function, timer function.
CIRCUIT
CE
Pin Function
Terminal connection / External dimensions
Signal Name Input / Output
VDD2
-
VEX
-
CE
RTC − 9701 JE
Function
Connected to a positive power supply.
Real time clock module power.
∗ Always supply the power irrespective of action situation to this terminal.
External voltage detection input pin
1.
VDD2
2.
VEX
3.
FOE
Input
The chip enabled input pin. ( built -in pull-down resistance )
4.
/ AIRQ
CLK
Input
The shift clock input pin for serial data transfer.
5.
/ TIRQ
16.
N.C.
DI
Input
The data input pin for serial data transfer.
6.
CE
15.
N.C.
DO
Output
The data output pin for serial data transfer.
7.
CLK
14.
N.C.
Output
This pin outputs the reference clock signal at 32.768 kHz ( C-MOS output ).
Low level at the time of output off.
8.
DI
9.
DO
10.
VDD
FOUT
FOE
Input
/ AIRQ
Output
Open drain output pin for alarm and time update interrupts.
The input pin for the FOUT output control.
/ TIRQ
Output
-
Connected to a ground.
Condition
Min.
Typ.
Max.
VDD
V DD2
VEX
VDD pin
V DD2 pin
V EX pin
2.7
1.8
1.4
3.0
3.0
3.6
5.5
5.5
V
V
V
TOPR
-
-40
+25
+85
°C
Frequency
tolerance
Item
Unit
∆f/f
Condition
Ta
= +25 °C
VDD = 3.0 V
GND
12.
GND
11.
6.0 ± 0.2
13.
FOUT
! EEPROM Memory characteristics
Symbol
Symbol
N.C.
∗ Refer to application manual for details.
! Frequency characteristics
Item
N.C.
17.
Metal m ay be exposed on the top or bottom of this product.
This will not affect any quality, reliability or electrical spec
! Recommended Operating Conditions
Power voltage
Clock voltage
Analog voltage
Operating
temperature
N.C.
18.
VSOJ − 20 pin
Specifications (characteristics)
Item
5.4
N.C.
19.
1.5 Max .
Open drain output pin for timer interrpt.
GND
20.
7.0 ± 0.3
-
0.65
VDD
( Unit:mm )
Rating
Unit
5 ± 23 ∗
× 10−6
Memory contents
Program/Erase cycle
Current consumption (write to EEPROM)
Access time
CLK clock cycle VDD = 3.0 V ± 0.3 V
CLK clock cycle VDD = 3.3 V ± 0.3 V
Min.
Typ.
Max.
4 kbit ( 256 × 16 bit )
5
10
1
3
5
10
1000
900
Unit
times
mA
ms
ns
ns
! Access characteristics
Item
CLK clock cycle
∗ Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)
∗ If not specifically indicated, VDD = 2.7 V to 3.6 V , VDD2 = 1.8 V to 5.5 V , Ta = −40 °C to +85 °C
http://www.epsontoyocom.co.jp
Min.
500
Typ.
Max.
Unit
ns
