RX-4801SA Datasheet, PDF (1/2 Pages) Epson ToYoCom – SERIAL-INTERFACE REAL TIME CLOCK MODULE

Real time clock module
Built-in 32.768 kHz-DTCXO, High Stability
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RX - 4801 SA
•Built in frequency adjusted 32.768 kHz crystal unit and DTCXO.
•Interface Type
: 4-wire serial interface
•Interface voltage range
: 1.8 V to 5.5 V
•Temp.compensated voltage range: 2.2 V to 5.5 V
•Wide Timekeeper voltage range : 1.6 V to 5.5 V
•32.768 kHz frequency output function : C-MOS output With Control Pin
•The various functions include full calendar, alarm, timer.
Actual size
Epson Toyocom
Product Number (Please contact us)
RX-4801SA : X1B000021xxxx00
Block diagramç
ç ç ç Overviewç
ç
FOUT
FOE
/ INT
DI
DO
CLK
CE
32.768 kHz
32kHz
DTC XO
DIVIDER
FOUT
CONT ROLLER
INTERRUPT
CONT ROLLER
INT ERFACE
CIR CUIT
C LOCK
and
CALENDAR
TIMER
REGIST ER
AL AR M
REGIST ER
CONTROL
REGIST ER
and
SYST EM
CONTROLLER
• High Stability
•UA
± 1.9 x 10^-6 / 0 ºC to +40 ºC
( Equivalent to 5 seconds of month deviation )
± 3.4 x 10^-6 / -40 ºC to +85 ºC
( Equivalent to 9 seconds of month deviation )
•UB
± 3.8 x 10^-6 / 0 ºC to +50 ºC
( Equivalent to 10 seconds of month deviation )
± 5.0 x 10^-6 / -40 ºC to +85 ºC
( Equivalent to 13 seconds of month deviation )
• 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 up between
1/ 4096 second and 255 minutes.
• Alarm Function can be set to day of week,
day, hour, or minute.
Pin Functionç
Signal Name
CE
CLK
FOUT
TEST
VDD
FOE
/ INT
GND
T2(VPP)
DO
DI
Pin No.
1
2
3
5
6
7
10
11
12
13
14
I/ O
Function
input ^{The chip enable input pin.}
input
Output
input
The shift clock input pin for serial data transfer.
The pin outputs the refarence clock signal.
( CMOS output )
* Use by the manufacture for testing.
( Do not connect externally.)
-
Connected to a positive power supply
input The input pin for the FOUT output control.
Output The open drain output for interrupt.
-
Connected to a ground
* Use by the manufacture for testing.
-
( Do not connect externally.)
Output The data output pin for serial data transfer.
input The data input pin for serial data transfer.
ç ç ç Terminal connection / External dimensionsç (Unit:mm) ç
RX − 4801 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. N.C.
7. FOE
7.4 ± 0 .2
8. N.C.
SOP − 14 pin
Metal may be exposed on the top or bottom of this product.
This w ill not affect any quality, reliability or electrical spec.
Specifications (characteristics)
! Electrical Characteristics
Item
Sym bol
Interface voltage
VDD
Temp. compensated
voltage
Clock voltage
VTEM
VCLK
Operating temperatue TOPR
Stability
∆f /f
Current consumption
(1)
IBK1
Current consumption
(2)
IBK2
Condition
Interface voltage
Temp. compensated voltage
-
-
UA ^{Ta = 0 ºC to +40 ºC}
Ta = -40 ºC to +85 ºC
Ta = 0 ºC to +50 ºC
UB _{Ta = -40 ºC to +85 ºC}
Backup Mode
FOE = GND,
VDD = 5V
/INT = VDD
FOUT output : OFF VDD = 3V
Min.
1.8
2.2
1.6
−40
-
Ty p.
3.0
3.0
3.0
+25
±1.9 ^∗1
±3.4 ^∗2
±3.8 ^∗3
±5.0 ^∗4
1.2
Max.
5.5
5.5
5.5
+85
3.4
-
0.8
2.8
∗1 ) _{Equivalent to 5 seconds of month deviation.} ∗2 ) _{Equivalent to 9 seconds of month deviation.}
∗3 ) _{Equivalent to 10 seconds of month deviation.} ∗4 ) _{Equivalent to 13 seconds of month deviation.}
Unit
V
V
V
°C
× 10 ^−6
µA
∗ Refer to application manual for details.
! 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)
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