RX-4575LC Datasheet, PDF (1/2 Pages) Epson ToYoCom – SERIAL INTERFACE REAL TIME CLOCK MODULE

Real time clock module
REAL TIME CLOCK MODULE (SPI-Bus)
Built-in external event detection.
RX-4575LC
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
: 3-wire serial interface
Operating voltage range
: 1.6V5.5V
Wide timekeeper voltage range : 1.3V5.5V
Low backup current
: 0.35A/3V(Typ.)
External event detection.
: Chattering free input port 2.
(The various functions include full calendar, alarm, timer.)
Actual size
Product Number (Please contact us)
RX-4575LC : Q414575C2000100
Block diagram
32.768 kHz
OSC
DIVIDE
FOUT
FOE
/ IRQN
/ EIRQN
EINA
EINB
DATA
CLK
CE 1
CE 0
OUTPUT
CONTROLLER
INTERRUPTS
CONTROLLER
INPUT
CONTROLLER
BUS
INTERFACE
CIRCUIT
CLOCK and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
EVENT DETECT
REGISTER
CONTROL
REGISTER
SHIFT REGISTER
Pin Function
Signal Name Input / Output
EINA
EINB
CE 0
CE 1
Input
Input
CLK
Input
Functions
External event input pin.
Interface is possible when both CE0 and CE1 is high level.
Serial Clock input pin.
DATA
FOUT
FOE
Bidirectional
Output
Input
Data input and output pin.
32.768 kHz clock output pin ( C-MOS ) .
Output is Hi-Z when OFF.
32kHz is output when input is Hi, 32 kHz is OFF when input is Lo.
/ EIRQ
Output Interrupt output pin. ( N-ch open drain )
/ IRQ
Output Interrupt output pin. ( N-ch open drain )
VDD
-
Connected to a positive power supply.
GND
-
Connected to a ground.
Overview
Event detection.
・Selectable Hi detection or Lo detection.
・Recognition of detection is available both the hardware
interrupt and the monitor via software.
・Automatic interrupt release mode is available.
・The all 'OR' interrupt output is possible via alarm,
timer and event detection.
Performance of event input terminal.
・As for the chattering filter,
following are prepared for. ( 8 ms, 31 ms, 62 ms, 125 ms )
・Built-in resistor connect and release is possible via
software. Selectable pull-up or pull-down.
Timer function
・Built in 12 bit counter.
・Timing period are 1 min, 1 s, 64 Hz, 4096 Hz.
Alarm function
・Alarm setting is possible by combination of a day,
hours, and minutes.
Terminal connection/External dimensions (Unit:mm)
RX4575LC
1. EINA
2. EINB
3. /EIRQ
4. /IRQ
5. FOE
6. FOUT
12. VDD
11. CE1
10. CLK
2.4
9. DATA
8. CE0
2.8
7. GND
VSOJ12pin
*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)
Recommended Operating conditions
Item
Symbol Conditions
Min.
Power voltage VDD

1.6
Clock voltage VCLK

1.3
Operating
Temperature
TOPR

-40
Frequency characteristics
Item
Symbol
Conditions
Frequency
tolerance
f/f
Ta=+25C
VDD=3.0V
Ta=+25C
Oscillation
Start-up time
tSTA
VDD=1.6V
Ta=-40C+85C
VDD=1.6V
*Equivalent to 1 minute of monthly deviation
Typ. Max. Unit
3.0 5.5
V
3.0 5.5
V
+25 +85
C
Rating
B: 523*
1Max.
3Max.
Unit
10^6
s
s
 Refer to application
Current consumption characteristics
Item Symbol
Conditions
Ta=-40C+85C
Min. Typ. Max. Unit
CE0, CE1=GND
/ IRQ, / EIRQ= OFF
VDD
=5V
-
0.45 0.9
Current
IBK _{FOUT: output OFFï€} 
Event detection OFF
VDD
=3V
-
A
0.35 0.7
Consumpti
on
CE0, CE1=GND
/ IRQ, / EIRQ= OFF
VDD
=5V
-
8.0 20.0
I32k _{FOUT; CL=30pF}
32.768kHz output ON
VDD
=3V
-
A
5.0 12.0