RA4803SA Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (SPI-Bus)

Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
For Automotive
Built-in 32.768 kHz-DTCXO, High Stability
RA4803 SA
Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.
1/100s resolution Time register
Interface Type
: 4-wire serial interface
Interface voltage range
: 1.6 V to 5.5 V
Temp. compensated voltage range : 2.2 V to 5.5 V
Clock supply voltage range
: 1.6 V to 5.5 V
 Selectable clock output (32.768 kHz, 1024 Hz, 1 Hz)
The various functions include full calendar, alarm, timer, EVIN input.
Applications : Car audio, Car navigation system, Clock
Conforms to AEC-Q200
Actual size
Product Number (Please contact us)
RA4803SA : X1B000252Axxx00
Block diagramç
32.768 kHz
32kHz
DTCXO
FOE
FOUT
EVIN
/ INT
DI
DO
CLK
CE
DIVIDER
FOUT
CONTROLLER
INTERRUPT
CONTROLLER
INTERFACE
CIRCUIT
CLOCK
and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
SYSTEM
CONTROLLER
and
CONTROL
REGISTER
Pin Functionç
Signal Name
CE
CLK
FOUT
TEST
VDD
FOE
EVIN
/ INT
GND
T2(VPP)
DO
DI
I/O
input
input
Output
input
-
input
input
Output
-
-
Output
input
Function
The chip enable input pin.
The shift clock input pin for serial data transfer.
The pin outputs the reference clock signal.
( CMOS output )
Use by the manufacture for testing.
Connected to a positive power supply
The input pin for the FOUT output control.
External event input.
Interrupt output (N-ch. open drain).
Connected to a ground
Use by the manufacture for testing.
( Do not connect externally.)
The data output pin for serial data transfer.
The data input pin for serial data transfer.
ç ç ç Overviewç
ç
High Stability
UA ± 3.4 x 10^-6 / -40 ºC to +85 ºC
( Equivalent to 9 seconds of month deviation )
UB ± 5.0 x 10^-6 / -40 ºC to +85 ºC
( Equivalent to 13 seconds of month deviation )
UC ± 5.0 x 10^-6 / -30 ºC to +70 ºC
AA (+5 ± 5.0) x 10^-6 / +25 ºC
High Resolution: 1/100s Time register with capture buffer
 32.768 kHz frequency output function
 FOUT pin output (C-MOS output), CL=30 pF
 Output selectable: 32.768 kHz, 1024 Hz, 1 Hz
 The various interrupt
 Timer Function can be set between 1/ 4096 second and
4095 minutes.
 Alarm Function can be set to day of week, day, hour, or minute.
 EVIN input.
 Time synchronize function with 1PPS signal input
 Register compatibility: upper compatible with RX-4801.
*It is possible to use it by the terminal connection as
32.768 kHz-DTCXO.
ç ç ç Terminal connection/External dimensionsç
(Unit:mm)ç
RA4803SA
1. CE
14. DI
2. CLK
13. DO
3. FOUT
12. T2(VPP)
4. N.C.
5. TEST
11. GND
5.0
10. /INT
6. VDD
9. EVIN
7. FOE
7.40.2
8. N.C.
SOP14 pin
The metal case inside of the molding compound may be exposed on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality, reliability or electrical specs.
Specifications (characteristics)
Electrical Characteristics
Item
Symbol
Conditions
Min. Typ. Max.
Interface voltage
VDD  Interface voltage
1.6 3.0 5.5
Temp. compensated Voltage
VTEM Temp. compensated voltage
2.2 3.0 5.5
Clock supply voltage
VCLK
-
1.6 3.0 5.5
Operating temperature
TOPR No condensation
-40 +25 +85
Stability
UA
UB
f/f _UC
Ta= -40 ºC to +85 ºC
Ta=-40 ºC to +85 ºC
Ta= -30 ºC to +70 ºC
±3.4¹
±5.0²
AA Ta=+25 ºC
5 ± 5.0^3
Current consumption (1)
Current consumption (2)
IDD1
Backup Mode
FOE = GND,
VDD = 5V
-
IDD2
/INT = VDD
FOUT output : OFF
VDD = 3V
-
^{1)} Equivalent to 9 seconds of month deviation. ^{2)ï€} Equivalent to 13 seconds of month deviation.
3)Equivalent _{to 13 seconds of month deviation. ( excluding offset )}
0.75 3.4
0.75 2.1
Unit
V
V
V
ºC
10^-6
A
 Refer to application manual for details. ç
32.768 kHz-DTCXO Frequency temperature characteristics (Example)
Frequency temperature characteristics
10
5
32.768 kHz DTCXO
0
-5
-10
-15
Tuning fork X'tal
-20
-25
-30
-45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85
Temperature (ºC)