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CMOS timer with RAM and I2C-bus control.
TECHNICAL DATA
INA8583N
INA8583N is a timer with RAM and I2C-bus control. Designed for use in ap-
pliances having I2C-bus as clock/calendar/timer/alarm/events counter for turn-
ing on functions of the appliance at preset time or upon completion of an
event. To be used in audio and appliances.
Features:
- I2C- bus interface operating supply voltage: 2.5 V to 6 V;
- Clock operating supply voltage ( 0÷70°С): 1.0 V to 6 V;
- Operating current (at fSCL = 0Hz):
50 µА;
m- Clock function with four year calendar;
- 24 or 12 hour format;
o- 32.768 kHz or 50Hz time base;
.c- Serial bus (I2C);
- Automatic word address in crementation;
- Programmable alarm, timer and interrupt function;
U- Operating temperature range: -20 to +70 ОС.
-
TA = -20° Tо 70° C
t4Table1 – PIN ASSIGNMENT
eeOSCI
hOSCO
A0
SGND
SDA
taSCL
INT
Vcc
Pin
1 Generator input, 50Hz or occurrences
2 Generator output
3 Address input
4 GND
5 Data for I2C-bus
6 Clock pulses for I2C-bus
7 Open-drain interrupt output
8 Supply voltage
.DaPinning diagram
ww OSCI
w OSCO
1
2
8 Vcc
7 INT
A0 3
6 SCL
GND
4
5 SDA
Fig.1 www.DataS1heet4U.com

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INA8583
Block diagram INA8583N
OSCI
OSCO
INT
VCC
GND
INA8583N
INA8583
OSCILLATOR
32.768kHz
Power-on
reset
A0
SCL
SDA
I2C-bus
interface
Divider
1:256 or
100:128
100Hz
Control
logic
Address
register
Control/status
Hundredth of a second
seconds
minutes
hours
Year/date
Weekday/months
timer
Alarm control
Alarm regisers
or RAM
RAM
(240х8)
00
01
07
08
0F
FF
Fig. 2.
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INA8583
Table 2 – Recommend-operating conditions
Parameter
Symbol
Unit
Supply voltage, Vcc, V
Limits
Not more
Not less
Note
„ operating
„ clock
Low input voltage, Vil,
V
High input voltage, Vih,
V
Operating ambient tem-
perature, Tamb, °C
Input frequency,
fI, MHz
2.5
1.0
0
0.7*Vcc
-20
6.0
6.0
0.3*Vcc
Vcc
+70
1
Tamb=0÷+70°C
Only for event
mode
Table3 – Absolute maximum rating
Parameter
Limits
Note
Symbol
Unit Not more Not less
Supply voltage, Vcc, V
-0.8 7,0
Input voltage for all inputs, VI, V
Max output current, Io, mA
-0.8 Vcc+0.8 Note1
10
Max input current, II, mA
Current through inputs 04 or 08, IDD,
ISS, mА
Power dissipation on package, РTOT,
mW
10
50
300
Power dissipation on output , РО, mW
Storage temperature, Tstg, °С
-65
50
+150
Notes:
1. If voltage on diode is higher than VCC or lower than GND, the current will flow, the cur-
rent should be not more than ±0.5mA.
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INA8583
Table 4 – Electrical parameters.
Parameter, Symbol
unit
Supply
Supply current ,Iсс, µA
Supply current for clock,
IСС0,
µA
Limit
Not less
Not more
Testing con-
ditions
Tempera-
ture, °C
200 Vcc=6V
T=-20
FSCL= 100kHz +25
+70
50 Vcc=5V
10 Vcc=1V
Data storage supply cur-
5 Note 1
rent, ICCR, µA
I2C-bus enable level, VPOR,
V
1.5
VCC= 1V
2 VCC= 1V
2.3 Note 2
Input/output SDA
Low output current, IOL,
mA
3
Vcc= 6 V
Vol= 0.4 V
Input leakage current,
1 Vcc= 6 V
|II|, µA
VIL= 0 V
VIH= 6 V
SCL, SDA
Input capacity, СI,pF
7 VI=0 V
Inputs A0, OSCI
Input leakage current,
250 Vcc= 6 V
|II|, nA
VIL= 0 V
VIH= 6 V
Output INT
Output low current, IOL,
mA
Input leakage current,
3
Vcc=6.0 V
VOL=0,4 V
1 Vcc= 6 V
|II|, µA
Notes:
VIL= 0 V
VIH= 6 V
1. For event mode or 50Hz only.
2. The I2C-bus logic is disabled if VCC < VPOR.
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INA8583
INA8583N contains 256х8 RAM 8-bit. The word address register which is incremented automati-
cally, built-in 32.768 kHz oscillator circuit, frequency divider, interface of two line bi-directional
serial I2C-bus and power-on reset circuit.
The first 8 bits of the RAM (addresses 00÷07) are designated ass addressable 8-bit parallel
registers. The first register (address 00) is used as a control/status register. The memory addresses
01 to 07 are used as counters for the clock function. The memory address 08÷0F may be used as
free RAM locations or may be programmed as alarm registers.
The following modes can be selected by setting the control/status register:
„ Clock mode from 32.768 kHz;
„ Clock mode from 50 Hz;
„ Event counter mode.
In the clock mode hundredths of a second, seconds, minutes, hours, date, month (four-year
calendar) and a weekday are stored in a BCD format. The timer register stores up to 99 days. The
event counter mode is used for counting pulses applied to the oscillator input (OSCO left open-
circuit). In BCD format the event counter stores up to 6 digits.
By setting the alarm enabling bit of the control/status register the alarm control register (ad-
dress 08) is activated.
By setting the alarm control register the following may be programmed:
„ Dated alarm;
„ Weekday alarm;
„ Daily alarm;
„ Timer alarm.
In the clock mode the timer register (address 07) may be programmed to count hundredths
of a second, seconds, minutes, hours or days. Days are counted when an alarm is not programmed.
Whenever an alarm event occurs the alarm flag of the control/status register is set, and an
overflow condition of the timer will set the timer flag. The open drain interrupt output is switched
on (active LOW) when the alarm or timer flag is set. The flags remain set until directly reset by a
write operation to register (00 address).
When the alarm is disabled the remaining alarm registers (addresses 09÷0F) may be used as
free RAM.
In the clock modes 24hr or 12hr format can be selected by setting the most significant bit of
the hours counter register.
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