RX-4581NB:B3:ROHS Epson, RX-4581NB:B3:ROHS Datasheet
![Real Time Clock 32.768KHz 128Bit RAM -40C +85C](/photos/16/2/160275/rx-4581_sml.jpg)
RX-4581NB:B3:ROHS
Manufacturer Part Number
RX-4581NB:B3:ROHS
Description
Real Time Clock 32.768KHz 128Bit RAM -40C +85C
Manufacturer
Epson
Datasheet
1.RX-4581NBB3ROHS.pdf
(2 pages)
Specifications of RX-4581NB:B3:ROHS
Function
Calendar, Alarm, Timer
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.6 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Rtc Bus Interface
Serial
Package / Case
SON-22
Time Format
HH:MM:SS (24 hr)
Date Format
YY:MM:DD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
RX-4581NB:B3:ROHS
Manufacturer:
Exar
Quantity:
84
Signal Name Input/Output
Power voltage
Clock voltage
Operating
Frequency
Oscillation
Built-in SRAM
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RX - 4581 NB
Please ask for tighter tolerance. (
temperature
tolerance
start-up time
/ AIRQ
/ TIRQ
FOUT
Block diagram
Pin Function
Specifications (characteristics)
Built in frequency adjusted 32.768 kHz crystal unit.
Interface Type
Operating voltage range
Wide Timekeeper voltage range
Low backup current
Built-in SRAM
32.768 kHz frequency output function : C-MOS output With Control Pin
The various functions include full calendar, alarm, timer.
GND
CE0
CE1
CLK
FOE
V
Recommended Operating Conditions
Frequency characteristics
DO
FOUT
FOE
/ AIRQ
/ TIRQ
D I
DO
CLK
CE1
CE0
DI
Real time clock module
Real time clock module
Real time clock module
Real time clock module
DD
Item
Item
Output
Output
Output
Output
32.768 kHz
Input
Input
Input
Input
Input
-
-
OSC
Symbol
Symbol
T
V
V
t
STA
OPR
CLK
DD
f / f
The chip enabled input pin 0. ( It has a built -in pull-down resistance )
The chip enabled input pin 1. ( It does not have a built -in pull-down resistance )
The shift clock input pin for serial data transfer.
The data input pin for serial data trasfer.
The data output pin for serial data trasfer.
This pin outputs the reference clock signal at 32.768 kHz ( CMOS output ).
High impedance at the time of output off.
The input pin for the FOUT output control.
The open drain output pin for alarm and time update interrupts.
The open drain output pin for timer interrupt.
Connected to a positive power supply.
Connected to a ground.
Equivalent to 1 minute of monthly deviation)
T
V
T
V
FOUT
INTERRUPTS
BUS
a
a
DD
DD
= +25 C
= +25 C
Condition
INTERFACE
CONTROLLER
CONTROLLER
= 3.0 V
= 3.0 V
DIVIDER
-
-
-
Condition
CIRCUIT
:
: 1.6 V to 5.5 V
: 1.6 V to 5.5 V
: 0.4 A / 3 V ( Typ. )
: Built-in 128 bit ( 8 bit 16 ) RAM.
RAM 128 bit
4-wire serial interface
( 8 bit
Min.
1.6
1.6
40
16 )
Typ.
+25
Function
3.0
3.0
CLOCK
TIMER
ALARM
CONTROL
SYSTEM
3 Max.
5
Rating
http://www.epsontoyocom.co.jp
CONTROLLER
and
23
REGISTER
REGISTER
REGISTER
CALENDAR
and
Max.
+85
5.5
5.5
Unit
Unit
10
V
V
s
C
6
Actual size
Current
Consumption
Current consumption characteristics
Item
Built-in SRAM
Interface Type
32.768 kHz frequency output function
Interrupt function
Timer function
Overview
Symbol
• Include 128 bit ( 8 bit 16 ) RAM.
• Serial interface in 4 lines form.
• FOUT pin output (C-MOS output), CL=30 pF
• FOE pin enables output on/off control.
• Timer function can be set up between
• It is recorded automatic to TF-bit at the time of event
• Alarm interrupt function , and timer interrupt function.
I
I
32k
1/4096 second and 4095 minutes.
occurrence,and possible to output with /TIRQ pin output
(open-drain output).
BK
It is possible to make it to 3 lines by wired-OR connecting
DI and DO pins.
Terminal connection / External dimensions
CE0, CE1 = GND
FOE = GND
FOUT ;
CE0, CE1 = GND
FOE = V
FOUT ;
32.768 kHz output ON
CL = 30 pF
10.
11.
* Refer to application manual for details.
output OFF
1.
2.
3.
4.
5.
6.
7.
8.
9.
( Hi - z )
Metal may be exposed on the top or bottom of this product.
DD
Condition
This will not affect any quality, reliability or electrical spec.
GND
CE1
CE0
DI
DO
CLK
/ TIRQ
/ AIRQ
FOE
FOUT
V
Product Number (Please contact us)
RX-4581NB : Q41458191000200
DD
RX 4581 NB
V
V
V
V
DD
DD
DD
DD
Epson Toyocom
Epson Toyocom
Epson Toyocom
Epson Toyocom
= 5 V
= 3 V
= 5 V
= 3 V
SON
5.0
4.8
22 pin
0.2
Min.
1.3
0.1
T
Typ.
0.6
0.4
8.0
5.0
a
= 40 C to +85 C
22.
21.
20.
19.
18.
17.
16.
15.
14.
13.
12.
Max.
20.0
12.0
1.2
0.8
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
Unit
(Unit:mm)
A
A
Related parts for RX-4581NB:B3:ROHS
RX-4581NB:B3:ROHS Summary of contents
Page 1
... Real time clock module Real time clock module Real time clock module Real time clock module Built-in SRAM SERIAL-INTERFACE REAL TIME CLOCK MODULE RX - 4581 NB Built in frequency adjusted 32.768 kHz crystal unit. Interface Type : 4-wire serial interface Operating voltage range : 5.5 V ...
Page 2
... Epson Toyocom. ●The information, applied circuitry, programming, usage, etc., written in this material is intended for reference only. Epson Toyocom does not assume any liability for the occurrence of infringing on any patent or copyright of a third party ...