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Электронный компонент: IZ1229

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IZ1229
1
10-D
IGITS
C
ALCULATOR

The IZ1229 is a single chip CMOS LSI with 10-digit arithmetic operation , single memory,
extraction-of-square-root, percentage calculation, auto power off and punctuation and touch tone
function, designed for FEM LCD operation with a 1.5V power supply.

FUNCTIONS
Four standard functions (+, -,
,
)
Square and reciprocal calculations
Extraction of square root
Auto constant calculations (constant:
multiplicand, divisor,
addend and subtrahend)
Mark-up and mark-down calculations
Percentage calculations
Chain multiplication and division
Power calculations
Rough estimate calculations
Punctuation comma and touch tone mark display
Clear key: ON/C, CE
Touch tone function
FEATURES
Single chip CMOS construction
Floating decimal point
LCD direct drive
Overflow indication: "E"
On chip oscillator components
Auto Power off
Accumulating memory: M+, M-, MR,
MC, MRC
Bare chip is available
Direct type


LCD CONNECTION
H2 H3 a11 c10 b10 a10 c9 b9 a9 c8 b8 a8 c7 b7 a7 c6 b6 a6 c5 b5 a5 c4 b4 a4 c3 b3 a3 c2 b2 a2 c1 b1 a1 H1
ABSOLUTE MAXIMUM RATINGS ( T
a
= 25
o
C )
Characteristic Symbol
Value
Unit
Terminal Voltage
V
CC
- 0.3 ~ + 2.1
V
V
IN
- 0.3 ~ V
CC
+
0.3 V
Operating Temperature
T
a
0 ~ + 50
o
C
Storage Temperature
T
stg
- 55 ~ + 125
o
C





IZ1229
2
ELECTRICAL CHARACTERISTICS (T
a
= 25
o
C, V
CC
= 1.5V, unless otherwise specified)

Characteristic Symbol
Test
Condition
Min Typ Max Unit
Operating
Voltage
V
OP
1.1
1.5
1.8
V
Input Voltage
V
IH
V
CC
-
0.4
V
(pins FDISB,
EXT)
V
IL
0.4
Input Current 1
I
IH1
V
IN
= V
CC
1
A
(pins FDISB,
EXT)
I
IL1
V
IN
= 0V
1.5
2.5
3
Input Current 2
I
IH2
V
IN
= V
CC
;
APODISB
=
0V
1
A
(pins K4
K6)
I
IL2
V
IN
= 0V; FDISB = 0V
3
5.5
7.5
Output Voltage
V
OA
Without load
2.80
2.95
(pins a1
a11,
b1
b10,
V
OB
Without
load 1.30
1.50
1.70
V
c1
c10, H1
H3)
V
OC
Without
load 0
0.20
Display
Frequency
F
d
V
CC
= 1.3V, Display is
on
55 75
Hz
Touch Tone
Output Drive
I
OH
V
OH
=1.0V, APODISB
=
0V, FDISB = 0V
1.3
2
mA
Current I
OL
V
OL
=0.5V, APODISB
=
0V, FDISB = 1.5V
1.3 2
Supply Current
I
OFF
Display is off
1
A
I
DIS
V
CC
= 1.3V, Ddisplay is
on
6
10

IZ1229
3
FUNCTIONAL DESCRIPTION

Decimal point system

Complete floating decimal point system.

Integral number

10 digits leading zero suppression. Zero shift.

Symbols - : negative number display
E : error display
, : punctuation comma

: touch tone indicator

Error detections
System errors occur when:
1) The division by zero.
2) The extraction of square root of a negative number.
3) The integral part of any memory calculation result exceeds 10 digits.
Rough estimate calculation error occur when
The integral part of any calculation - any standard functions, percentage, square root,
reciprocal or power calculations result exceeds 10 digits.

Error indication
System error
"0" is indicated in the 1-digit position and "E" in the sign-digit position.
Rough estimate calculation error
The high-order 10-digit calculation result is indicated together with "E".
The decimal point is indicated if the position corresponding to a calculation result of time 10
-10
,
and no zero shift is performed

Error release
System error
A system error can be release by the ON/C key.
Rough estimate calculation error
ON/C key can release a rough estimate-calculation error and clear calculation result at once. CE
key can release only a rough estimate calculation error ("E" flag).

Number entry
Numericals can be entered up to 10 digits. Numerical entries equal to 11 digits or more are
ignored.

Memory protection
In any error detection, the memory contents present before the error detection are protected.

Memory indication
If the memory content is not zero, "M" is indicated in the sign-digit position.
IZ1229
4

Key bounce protection

Front edge
Minimum 3 words
Trailing edge
Minimum 16 words
1 word is 3.3ms when display frequency is F
d
= 100Hz.

Auto power OFF
Power automatically turns off after 7 - 8 minutes pass from the last key pressure. By connecting
the APODISB pin to GND or V
CC
, the auto power off function is disabled or enabled, respectively.
,
,
,
H1
H2
H3
H2
H3
,
,
,
,
c10
c9
b9a9 c8
b8a8 c7
b7a7 c6
b6a6 c5
b5a5 c4
b4a4 c3
b3a3 c2
b2a2 c1
b1a1
b10a10
a11


TOUCH TONE ( ) KEY
When power is ON, the touch tone function is enable and the beep sound with f=2KHz is
generated output during 125ms and
sign is displayed on LCD.
Selection of touch tone function is toggled by touch tone key.

CLEAR KEY DESCRIPTION

ON/C key
Power-on function.
All operations are cleared by the ON/C key (except memory contents).

CE key
CE key can edit the last operand or operator.

MARK-UP AND MARK-DOWN CALCULATION
ENTRY DISPLAY
A A A
A
+/-
A A
B B B
B
% %
A
AM/100
AM/100
+ OR -
AM/100
=
A + AM/100 OR A -
AM/100
Note: AM: AMOUNT
Direct LCD with IZ1229
IZ1229
5

APPLICATION CIRCUIT (direct LCD)
IZ1229 (CHIP)
21
H
1
9
a1~a7, b1~b7, c1~c7
a8~a11, b8~b10, c8~c10
H2, H3
2
a4
b4
c4
a5
b5
c3
b3
a3
c2
b2
a2
Vcc
Vcc
a11
a10
b10
c10
H
2
H
3
GND
V
C
V
A
V
B
c1
b1
a1
H
1
PO
PIEZO
BUZZER
0.1 F
0.1 F
Rp
D2
D1
K
5
K
6
%
7
4
1
2
3
0
5
6
8
9
M+
M-
x
+
MR
a8
a9
a10
b10
c10
b9
c9
b8
c8
.
=
MRC
MC
CE
OFF
+/-
-
.
.
K
4
K
4
K
3
K
5
K
6
APO
FD
EXT
ON/C
b9
c9
c5
a6
b6
c6
a7
b7
c7
a8
b8
c8
a9
33 F
1.5V
ON/C
+
-
NOTE1: AUTO POWER OFF CONDITION
D1, D2: Protection Diode
APODISB
V
CC
GND
Rp : Protection Resistor
(0.5 ~1.5K
)
APO STATE
ENABLE
DISABLE