RX-4035 Datasheet, PDF (1/2 Pages) Epson Company – REAL TIME CLOCK MODULE (SPI-Bus)

Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
High-Stability Frequency with Built in Timestamp and
Power Switching
RX-4035SA/LC
Built-in 32.768 kHz crystal unit : Frequency adjusted for high accuracy.
 (510^6/Ta=+25C)
Interface Type
: SPI-Bus (1MHz)
Operating voltage range
: 2.4Vto5.5V
Timekeeping voltage range
: 1.0Vto5.5V
Low backup current
: 350 nA (SA) 400 nA (LC)/ 3V(Typ.)
Event detection and Time stamp : One-shot full timestamp and interrupt.
Dual event detection ports
: Each terminal has a de-bounce circuit.
Auto power switching functions : When VDD deteriorates than 2.4V,
internal source is switched to VBAT.
.
Actual size
RX-4035SA
Product Number (Please contact us)
RX-4035SA: X1B000192xxxx00
RX-4035LC: X1B000202xxxx00
RX-4035LC
Block diagramç
ç ç ç Overviewç
ç
Vout
VBAT
Rechargeable
Battery.
or
Capacitor.
VOLTAGE
DETECTOR
VOLTAGE
DETECTOR
OSC
CLOCK
CALENDER
TIME STAMP
Detects High level.
EVIN1
EVIN2
De-bounce
Main
VDD
CE
CLK
SI
SO
CLKOUT
/ INT
GND
External
CPU
The event detection and Timestamp function
Dual event detection terminals.
Selectable de-bounce period 35ms or 2s.
Available event detection interrupt output.
Power switching functions.
 When VDD is less than 2.4V, an internal source is switched
to VBAT.
Note: When the supply from VBAT, SPI interface are
disabled.
Alarm, Periodic interrupt, 32.768kHz clock output.
Available monthly-alarm and weekly-alarm.
Interrupt period are selectable from 2Hz to Monthly.
CLKOUT outputs 32.768kHz clock powered by VDD.
Pin functionç
Signal
Name
VBAT
Vout
CE
CLK
SO
SI
GND
EVIN1
EVIN2
/ INT
CLKOUT
N.C.
VDD
Input /
Output
-
Output
Input
Input
Output
Input
-
Input
Input
Output
Output
-
-
Function
Power supply for backup.
Switched power out.
(maximum output current 20mA)
SPI chip enable.
SPI serial clock.
SPI data out.
SPI data in. 
Ground
Event detection input 1
Event detection input 2
Interrupt out.
32.768kHz output. (CMOS. Can not inhibit.)
Do not connect.
Main power supply.
ç ç ç Terminal connection/External dimensionsç
(Unit:mm)ç
RX4035SA
RX4035LC
1. N.C.
2. CLK
3. CLKOUT
4. VBAT
5.0
5. N.C.
6. VDD
14. EVIN2
1. Vout
12. EVIN1
13. SI
2. VDD
11. CE
12. SO
3. N.C.
10. / INT
11. GND
4. VBAT
2.4
9. GND
10. / INT
5. CLKOUT
8. SO
9. CE
6. CLK
2.8
7. SI
7. Vout
7.40.2
SOP14 pin
8. EVIN1
VSOJ12pin
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.
*Stop using the glue
Any glue must never use it after soldering LC-package to a circuit board.This product has glass on the back side of a package.When
glue invasions between circuit board side and glass side, then glass cracks by thermal expansion of glue.In this case a crystal oscillation
stops.Consider glue abolition or glue do not touch to LC-package
Specifications (characteristics)
 Refer to application manual for details.
 Recommended Operating Conditions
Item
Symbol Conditions Min.
Operating voltage
VACCESS
VDD
2.4
Time keeping voltage VCLK
VBAT
1.0
Operating temperature TOPR
-
-40
Storage temperature
TSTG
-
-55
 Frequency characteristics
Item
Symbol
Conditions
Frequency
tolerance
f/f
Ta=+25°C
VBAT=3.0V
Oscillation
start-up time
tSTA
Ta=+25°C
VDD=3.0V
Frequency / voltage
characteristics
f/V
Ta=+25°C
VDD=2.4Vto5.5V
1) Equivalent to 1 minute of monthly deviation (excluding offset.)
2) Equivalent to 13 seconds of monthly deviation (excluding offset.)
Typ. Max. Unit
3.0 5.5
V
3.0 5.5
V
+25 +85 C
- +125 C
Rating
B: 523 ^1)
AA: 55^2)
AC: 05^2)
1Max.
1Max.
Unit
10^6
s
10^6
 Current consumption characteristics
Item
Symbol
Conditions
Min.
RX-4035SA
VBAT=3.0V, VDD = 0.0V
IBAT
CE = 0V, CLKOUT = open
RX-4035LC
-
Current
Consumption
VBAT=3.0V, VDD = 0.0V
CE = 0V, CLKOUT = open
VDD = 3.0V
IDD CE = 0V
-
CLKOUT = open
Ta=-40Cto+85C
Typ. Max. Unit
350
1200 nA
400
1.40 2.50 µA
 Power supply detection voltage
Item
Symbol Conditions
VBAT detect voltage
Power switching voltage
(VDD to VBAT)
VLOW
VD2B
-
+25C
Min.
1.10
2.328
Ta=-40Cto+85C
Typ. Max. Unit
1.25 1.40 V
2.40 2.472 V