RA-8565SA:B3:ROHS [SEIKO]
MEMORY REFRESH TIMER;
| 型号： | RA-8565SA:B3:ROHS |
| 厂家： | 
SEIKO EPSON CORPORATION |
| 描述： | MEMORY REFRESH TIMER |
| 文件： | 总1页 (文件大小：447K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Real time clock module
Epson Toyocom
For Automotive
I2C-Bus INTERFACE REAL TIME CLOCK MODULE
RA- 8565 SA
•Built in frequency adjusted 32.768 kHz crystal unit.
•Interface Type
•Wide operating voltage range
: I2C-Bus Interface (400 kHz)
: 1.8 V to 5.5 V
•Wide Timekeeper voltage range
: 1.7 V to 5.5 V
T
a
= −40 °C to +125 °C
•
Extended operating temperature range: −40 °C to +125 °C
•32.768 kHz frequency output function: N-ch Open drain output
With Control Pin
Actual size
•The various functions include full calendar, alarm, timer,etc
* The I2C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
• Wide operating temperature range for automotive
! −40 °C to +125 °C
32.768 kHz
CRYSTAL
Control 1
Control 2
00
OSC
Voltage Detector
DIVIDER
Seconds
• Clocking-status detection function
Minutes
! It can judge the validity of data after backup
operation return by a status of VL-bit.
Hours
CLKOUT
CLKOE
OUTPUT
Days
CONTROL
Weekdays
Month
• 32.768kHz frequency output function
! CLKOUT pin output (N-ch Open Drain output )
! Output frequency can be selected
Years
/ INT
Minutes Alarm
Hour Alarm
Day Alarm
Weekday Alarm
CLKOUT frequency
Timer Control
Timer
CONTROL
LOGIC
as 32.768kHz, 1024Hz, 32Hz, or 1Hz.
I2C-BUS
SCL
SDA
• The various interrupt function
! Timer function can be set up between
1/4096 second and 255 minutes.
! Alarm function can be set to day of week,
day, hour, or minute.
INTERFACE
ADDRESS
REGISTER
0F
POR
Pin Function
Terminal connection / External dimensions
(Unit:mm)
−
RA 8565 SA
1. N.C.
2. SCL
3. SDA
4. N.C.
5. GND
6. N.C.
7. / INT
14. CLKOUT
Terminal
Directions
Input
Functions
SCL
SDA
Serial clock input.
13. N.C.
12. N.C.
DD
Bi-directional Data input and output.
The CLKOUT pin is a clock output ( open drain output ) pin
with control output. ( Output frequency can be selected
as 32.768 kHz, 1024 Hz, 32 Hz, or 1 Hz. )
The CLKOE pin is an input pin used to control the output
mode of the CLKOUT output pin.
During the initial power-on ( when power is applied from 0 V ) ,
if the CLKOE input pin is at high level ( = H ) ,
the power-on reset function selects 32.768 kHz as the frequency.
CLKOUT
CLKOE
Output
Input
11.
V
5.0
10. CLKOE
9. N.C.
/INT
VDD
Output
−
−
Interrupts output by Alarm and Timer events. ( Open drain output )
Connected to a positive power supply.
± 0.2
7.4
8. N.C.
GND
Connected to a ground.
SOP - 14 pin
Metal may be exposed on the top or bottom of this product.
This will not affect any quality, reliability or electrical spec.
Specifications (characteristics)
Refer to application manual for details.
"
"
Current consumption under backup mode.
Recommended Operating Conditions
Item
Symbol
Conditions
Min.
1.8
Typ.
3.0
Max.
5.5
unit
V
Item
Symbol
Conditions
Min.
Typ.
0.95
Max.
1.80
unit
Operating
voltage
Timekeeper
voltage
Operating
temperature
DD
V
−
−
−
a
T
T
T
T
=
SCL
f
= 0 Hz
°
+125 C
CLK
V
1.7
3.0
5.5
V
CLKOE = LOW
µ
A
A
OPR
T
−
40
°
+25
+125
C
DD
V
= 5 V
a
a
a
=
0.60
0.80
0.55
°
+25
C
"
Frequency characteristics
Standby
current.
BK
I
Item
Symbol
Conditions
Rating
unit
=
a
°
C
T
= +25
Frequency
stability
SCL
f
1
−6
= 0 Hz
CLKOE = LOW
1.60
∆
±
×
f / f
5
23
10
s
°
+125 C
DD
V
a
= 3.0 V
°
T
= +25
C
µ
1.5 Max.
3 Max.
DD
Oscilation
start up time
V
= 1.8 V
DD
V
= 3 V
STA
t
=
a
−
°
°
C
T
V
=
40 C to +125
s
°
+25
C
DD
= 3.0 V
1 )
Equivalent to 1 minutes of monthly deviation.
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