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参数资料
| 型号： | RX-8731LC |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO12 |
| 封装： | ROHS COMPLIANT, VSOJ-12 |
| 文件页数： | 1/2页 |
| 文件大小： | 428K |
| 代理商： | RX-8731LC |
Actual size
http://www.epsontoyocom.co.jp
Real time clock module
Epson Toyocom
Block diagram
Overview
INTERRUPTS
CONTROLLER
ALARM REGISTER
OSC
/ IRQ
I
2C-Bus
INTERFACE
CIRCUIT
SCL
32.768 kHz
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
DIVIDER
CLOCK
and
CALENDAR
FOUT
CONTROLLER
FOUT
SDA
TIMER REGISTER
I/O Port
P00 – P03
EEPROM
10 Byte ( 80 bit )
4
ID-ROM
6 Byte ( 48 bit )
FOE
A 0
Built in EEPROM and ID-ROM
Built in 10 Byte ( 80 bit) EEPROM
Built in
6 Byte ( 48 bit ) ID-ROM
Programmable I/O ports
4 Programmable I/O ports
Interface Type
I
2C-Bus high-speed bus specifications. (400 kHz)
32.768 kHz frequency output function
FOUT pin output (C-MOS output), CL=30 pF
FOE pin enables output on/off control.
Output frequency is selectable.
< 32.768 kHz, 1024 Hz, 1 Hz >
The various interrupt function
Alarm interrupt function
Timer interrupt function
Update interrupt function
Pin Function
Terminal connection / External dimensions
(Unit:mm)
Signal Name Input / Output
Function
SCL
Input
Serial Clock input pin.
SDA
Bi-directional
Data input and output pin.
A 0
Input
Device address A0 input pin.
FOUT
Output
FOE
Input
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.
/ IRQ
Output
Interrupt output pin. ( N-ch open drain )
P00
P01
P02
P03
Bi-directional
Programmable I/O ports.
VDD
-
Connected to a positive power supply.
GND
-
Connected to a ground.
RX
8731 LC
1. FOE
12.
VDD
2. P00
11.
P01
3. SDA
10.
P02
4. SCL
9.
P03
5. A 0
8.
/ IRQ
6. GND
0.
5
2.4
3.
6
1.
2
Ma
x
.
2.8
7.
FOUT
VSOJ
12pin
Specifications (characteristics)
Refer to application manual for details.
Recommended Operating Conditions
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Power voltage
VDD
-
1.7
3.0
5.5
V
Clock voltage
VCLK
-
1.3
3.0
5.5
V
Operating
temperature
TOPR
-
-40
+25
+85
°C
Frequency characteristics
Item
Symbol
Condition
Rating
Unit
Frequency
tolerance
f / f
Ta = +25
°C
VDD = 3.0 V
5
± 23 *
× 106
Ta = +25
°C
VDD = 1.6 V
1 Max.
s
Oscillation
Start-up time
tSTA
Ta = -40
°C to +85 °C
VDD = 1.6 V
3 Max.
s
*Equivalent to 1 minute of monthly deviation
Current consumption characteristics
Ta =
40 °C to +70 °C
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
VDD
= 5 V
0.45
0.9
IBK
fSCL = 0 Hz
/ IRQ = OFF
FOUT : output OFF
( Hi - z )
VDD
= 3 V
0.35
0.7
A
VDD
= 5 V
8.0
16.0
Current
Consumption
I32k
fSCL = 0 Hz
/ IRQ = OFF
FOUT :
32.768 kHz output
CL = 30 pF
VDD
= 3 V
5.0
10.0
A
Built-in EEPROM and Unique ID-ROM
I
2C-Bus INTERFACE REAL TIME CLOCK MODULE
RX - 8731 LC
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: I
2C-Bus interface (400 kHz)
Operating voltage range
: 1.7 V to 5.5 V
Wide Timekeeper voltage range : 1.3 V to 5.5 V
Low backup current
: 0.35
A / 3 V (Typ.)
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
* The I
2C-Bus is a trademark of NXP Semiconductors
Product Number (Please contact us)
RX-8731LC : Q418731C1000100
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