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RA8804CE Datasheet(PDF) 1 Page - Epson Company

Part No. RA8804CE
Description  REAL TIME CLOCK MODULE (I2C-Bus) For Automotive Built-in 32.768 kHz-DTCXO
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Manufacturer  EPSON [Epson Company]
Direct Link  http://www.epsondevice.com
Logo EPSON - Epson Company

RA8804CE Datasheet(HTML) 1 Page - Epson Company

  RA8804CE Datasheet HTML 1Page - Epson Company RA8804CE Datasheet HTML 2Page - Epson Company  
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Real time clock module
Block diagram
Overview
INTERRUPTS
CONTROLLER
ALARM REGISTER
/ INT
BUS
INTERFACE
CIRCUIT
( 32.768 kHz )
CONTROL
REGISTER
DIVIDER
CLOCK
POWER
CONTROLLER
and
SDA
VDD
SCL
CALENDR
TIMER REGISTER
DTCXO
CONTROLLER
FOUT
FOUT
FOE
CONTROLLER
SOUT
SOUT
CONTROLLER
EVENT DETECTION
EVIN
CAPTURE
BUFFER
VDD
SYSTEM
CONTROLLER
Stability
• XA
± 3.4 x 10-6 / -40 ºC to +85 ºC
± 8.0 x 10-6 / +85 ºC to +105 ºC
• XB
± 5.0 x 10-6 / -40 ºC to +85 ºC
± 8.0 x 10-6 / +85 ºC to +105 ºC
32.768 kHz frequency output function
• FOUT pin output (C-MOS output), CL=30 pF
• Output selectable: 32.768 kHz, 1024 Hz, 1 Hz
•Event detection function
 When trigger input to EVIN-pin or specified by program, time and date
is recorded. The EVIN-pin with pull-up resistor that is releasable.
•Timer function
 Timer source clock are 1min., 1sec., 64Hz, 4096Hz.
 24-bit-presettable counter (244us to about 32years.)
•Alarm function
Alarm function can be set to day of week, day, hour, and minute.
•Internal state output function
 SOUT pin output (C-MOS output),
 It outputs selected flag-bit value or specified value(H or L).
Pin Function
Terminal connection
/External dimensions
(Unit:mm)
T
Specifications (characteristics)
 Refer to application manual for details.
REAL TIME CLOCK MODULE (I2C-Bus)
For Automotive
Built-in 32.768 kHz-DTCXO
RA 8804CE
•Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.
•Interface Type
: I2C-Bus interface (400kHz)
•Interface voltage range
: 1.6 V to 5.5 V
•Temp. compensated voltage range : 1.5 V to 5.5 V
•Timekeeping voltage range
: 1.5 V to 5.5 V
•Selectable clock output (32.768 kHz, 1024 Hz, 1 Hz)
•The various functions full calendar, alarm, timer, event detection.
•The time-stamp synchronizing to the event detection of EVIN-pin.
• The SOUT-pin outputs that selected flag bit value.
•Applications: Car electronics equipment. Industry machine.
Conforms to AEC-Q100
*The I
2C-BUS is a trademark of NXP Semiconductors.
Signal Name
I / O
Function
SOUT
Output
Internal state output pin.
SCL
Input
Serial clock input pin.
FOUT
Output
The pin outputs the reference clock signal.
( CMOS output )
EVIN
Input
Event input pin
VDD
-
Connected to a positive power supply
FOE
Input
The input pin for the FOUT output control.
/ INT
Output
Interrupt output (N-ch. open drain).
GND
-
Connected to a ground
T2
-
Use only for testing in the factory.
( Do not connect externally.)
SDA
I/O
Data input and output pin.
Electrical Characteristics
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Operating voltage
VDD
Interface voltage
1.6
3.0
5.5
V
Temp. compensated Voltage
VTEM
Temp. compensated voltage
1.5
3.0
5.5
V
Clock supply voltage
VCLK
Internal clock
1.5
3.0
5.5
V
Operating temperature
TOPR
No condensation
-40
+25
+105
ºC
Stability
f/f
XA
Ta
= -40 ºC  +85 ºC
±3.4
1
10-6
Ta
= +85 ºC  +105 ºC
±8.0
2
XB
Ta
=-40 ºC  +85 ºC
±5.0
3
Ta
= +85 ºC  +105 ºC
±8.0
2
Current consumption (1)
IDD1
fSCL=0Hz, /INT=VDD,
FOE =GND,FOUT:
OFF
Temp. Compensation
interval 2.0 s.
VDD = 5V
-
0.4
1.6
A
Current consumption (2)
IDD2
VDD = 3V
-
0.35
1.5
 1)Equivalent to ±9 seconds of month deviation. 2)Equivalent to ±21 seconds of month deviation. 3)Equivalent to ±13 seconds of month deviation.
Product Number (Please contact us)
RA8804CE : X1B000381Axxx00
RA8804CE
(3.2 × 2.5 × 1.0 mm)
RA8804CE
RA8804CE
1.
FOE
10.
/INT
2.
VDD
9.
GND
3.
EVIN
8. T2
4.
FOUT
7.
SDA
5.
SCL
6.
SOUT
2.5 ± 0.2
32.768 kHz-DTCXO Frequency temperature characteristics (Example)
Frequency temperature characteristics
-30
-25
-20
-15
-10
-5
0
5
10
-45
-35
-25
-15
-5
5
15
25
35
45
55
65
75
85
Temperature (ºC)
Tuning fork X'tal
32.768 kHz DTCXO
95
105


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