RX-8731LC:B3 PURE SN Epson Toyocom Corporation, RX-8731LC:B3 PURE SN Datasheet
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RX-8731LC:B3 PURE SN
Manufacturer Part Number
RX-8731LC:B3 PURE SN
Description
IC REAL TIME CLOCK 12-VSOJ
Manufacturer
Epson Toyocom Corporation
Series
-r
Type
Clock/Calendarr
Specifications of RX-8731LC:B3 PURE SN
Features
Alarm, EEPROM, Leap Year, Unique ID
Memory Size
80b
Time Format
HH:MM:SS (24 hr)
Date Format
YY-MM-DD-dd
Interface
I²C
Voltage - Supply
1.7 V ~ 5.5 V
Voltage - Supply, Battery
1.3 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
12-TSSOJ
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
NB10-029585
SER3786TR
SER3786TR
Signal Name Input / Output
! ! ! !
Power voltage
Clock voltage
Operating
! ! ! !
Frequency
Oscillation
Built-in EEPROM and U nique ID-ROM
I
RX - 8731 LC
2
*Equivalent to 1 minute of monthly deviation
* The I
FOUT
temperature
tolerance
Start-up time
C-Bus INTER FACE REA L TIME CLOCK MODU LE
Pin Function
/ IRQ
GND
Specifications (characteristics)
SDA
FOE
SCL
P00
P01
P02
P03
V
Frequency characteristics
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
Operating voltage range
Wide Timekeeper voltage range : 1.3 V to 5.5 V
Low backup current
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
A 0
Block diagram
Recommended Operating Conditions
Real time clock module
Real time clock module
Real time clock module
Real time clock module
DD
P00 – P03
Item
Item
SDA
SCL
FOE
FOUT
/ IRQ
A 0
2
C-Bus is a trademark of NXP Semiconductors
Bi-directional
Bi-directional
Output
Output
Input
Input
Input
-
-
Symbol
Symbol
V
T
V
t
OPR
STA
CLK
DD
f / f
32.768 kHz
OSC
4
Serial Clock input pin.
Data input and output pin.
Device address A0 input pin.
FOUT pin is 32.768 kHz clock output pin ( C-MOS ) that output control is
possible.
FOE pin control the frequency output from FOUT pin with FSEL1-bit and
FSEL0-bit.
Interrupt output pin. ( N-ch open drain )
Programmable I/O ports.
Connected to a positive power supply.
Connected to a ground.
T
V
T
V
T
V
a
DD
a
DD
a
DD
= +25 C
= +25 C
= -40 C to +85 C
Condition
= 3.0 V
= 1.6 V
= 1.6 V
-
-
-
INTERRUPTS
Condition
I
INTERFACE
CONTROLLER
CONTROLLER
CIRCUIT
FOUT
2
C-Bus
DIVIDER
I/O Port
: I
: 1.7 V to 5.5 V
: 0.35 A / 3 V (Typ.)
2
C-Bus interface (400 kHz)
Min.
-40
1.7
1.3
10 Byte ( 80 bit )
6 Byte ( 48 bit )
EEPROM
ID-ROM
Typ.
+25
3.0
3.0
Function
1 Max.
3 Max.
Rating
5 23 *
http://www.epsontoyocom.co.jp
TIMER REGISTER
ALARM REGISTER
CLOCK
CALENDAR
SYSTEM
CONTROL
and
and
CONTROLLER
REGISTER
Max.
+85
5.5
5.5
Unit
Unit
10
V
V
s
s
C
6
Actual size
! ! ! !
Current
Consumption
Current consumption characteristics
Item
Built in EEPROM and ID-ROM
The various interrupt function
Programmable I/O ports
32.768 kHz frequency output function
Interface Type
Overview
Symbol
• Built in 10 Byte ( 80 bit) EEPROM
• Built in 6 Byte ( 48 bit ) ID-ROM
• 4 Programmable I/O ports
• I
• FOUT pin output (C-MOS output), CL=30 pF
• FOE pin enables output on/off control.
• Output frequency is selectable.
• Alarm interrupt function
• Timer interrupt function
• Update interrupt function
I
I
32k
< 32.768 kHz, 1024 Hz, 1 Hz >
BK
2
C-Bus high-speed bus specifications. (400 kHz)
Terminal connection /External dimensions
f
/ IRQ = OFF
FOUT : output OFF
f
/ IRQ = OFF
FOUT :
CL = 30 pF
SCL
SCL
32.768 kHz output
= 0 Hz
= 0 Hz
1. FOE
2. P00
3. SDA
4. SCL
5. A 0
6. GND
( Hi - z )
Condition
Refer to application manual for details.
Product Number (Please contact us)
RX-8731LC : Q418731C1000100
RX 8731 LC
VSOJ
Epson Toyocom
Epson Toyocom
Epson Toyocom
Epson Toyocom
V
V
V
V
= 5 V
= 3 V
= 5 V
= 3 V
DD
DD
DD
DD
2.4
2.8
12pin
Min.
Typ.
0.45
0.35
T
12. V
10. P02
8.0
5.0
11. P01
a
9. P03
8. / IRQ
7. FOUT
= 40 C to +70 C
Max. Unit
16.0
10.0
DD
0.9
0.7
(Unit:mm)
µA
µA
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RX-8731LC:B3 PURE SN Summary of contents
Page 1
... Real time clock module Real time clock module Real time clock module Built-in EEPROM and U nique ID-ROM 2 I C-Bus INTER FACE REA L TIME CLOCK MODU 8731 LC Built in frequency adjusted 32.768 kHz crystal unit. 2 Interface Type : I C-Bus interface (400 kHz) Operating voltage range : 1 ...
Page 2
EPSON TOYOCOM In order to meet customer needs in a rapidly advancing digital, broadband and ubiquitous society, we are committed to offering products that are one step ahead of the market and a rank above the rest in quality. ...