SC3442
SCIENTIFIC 10-DIGITS CALCULATOR CIRCUIT
DESCRIPTION
The SC3442 is the CMOS LSI for a 10-digits display and the
complete single chip for scientific calculator with 56 programmed
functions.
FEATURES
* Display
-- 10 display digits plus negative code digits.
-- Scientific and engineering display.
-- 8 mantissa digits plus 2 exponent digits plus 2 negative code
digits.
* 14 kinds of special display
M
–
E
2ndF
HYP
DEG
RAD
Memory
Minus
Error
2nd Function
Hyperbolic
Degree
Radian
GRAD
(
)
BIN
OCT
HEX
CMX
STAT
Gradient
Parenthesis
Binary mode
Octal mode
Hexadecimal mode
Complex number mode
Statistic calculation mode
* It is possible to specify decimal part
digits by the TAB key.
* Direct drive for LCD (1/3 prebias, 1/4
duty)
* Automatic power off (about 7.5
minutes)
* Low power consumption
V
DD
=3.0V single power supply.
ORDERING INFORMATION
* The minus sign of the mantissa is floating minus.
* The arithmatic key operation has the same sequence as the
mathematical equation, 6 pending operations are allowed and ( )
are up to continuous 15 levels.
* Mutual conversion and calculation in arithmetic among binary,
octal, decimal, and hexadecimal numbers.
* One independent accumulating memory.
* It is possible to convert and fix the display number system by the
F→E key.
ABCOLUTE MAXIMUM RATINGS
Characteristics
Terminal Voltage
Operating Temperature
Storage Temperature
Symbol
V
DD
V
IN
T
opr
T
stg
Value
-0.3 ~ +5.0
-0.3 ~ V
DD
+0.3
0 ~+40
-55 ~ +125
Unit
V
V
°C
°C
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.04.17
Page 1 of 21
SC3442
ELECTRICAL CHARACTERISTICS
(V
DD
=+3.0V±0.2V, V
SS
=0V, T
amb
=25~70°C)
Characteristics
Operating Voltage
Supply Current
Symbol
V
DD
I
dis
I
opr
I
off
Osc Frequency
Frame Frequency
Auto Power Off
High Input Voltage (KI8~KI1)
Low Output Voltage (KI8~KI1)
High Output Voltage (KI8, KI4, KI2)
Low Output Voltage (KI1)
Key Pull Down Resistance (KI1)
Key Pull Up Resistance(KI8, KI4, KI2)
High Output Voltage (LCD, COM)
“ Output Voltage (LCD, COM)
M”
“ Output Voltage (LCD, COM)
M”
Low Output Voltage (LCD, COM)
F
dis
F
opr
F
f
I
apo
VIH
VIL
VOH
VOL
Fpd
Rpu
V
OH
V
OM
V
OM
V
OL
--
V
DD
=3V, Stand by
V
DD
=3V, Operation
V
DD
=3V, Off
V
DD
=3V, Stand by
V
DD
=3V, Operation
V
DD
=3V, Stand by
V
DD
=3V
--
--
--
--
V
ou
t=0V
V
out
=V
DD
--
--
--
--
110
300
V
DD
-0.5
V
SS
V
DD
-0.2
V
SS
30
30
V
DD
-0.2
2/3 V
DD
-0.2
1/3 V
DD
-0.2
V
SS
V
DD
V
SS
50
50
V
DD
2/3 V
DD
1/3 V
DD
V
SS
30
Condition
Min.
2.5
Typ.
3
20
70
1
45
200
180
430
600
V
DD
V
SS
+0.5
V
DD
V
SS
+0.2
70
70
V
DD
2/3 V
DD
+0.2
1/3 V
DD
+0.2
V
SS
+0.2
280
Max.
3.4
35
120
3
Unit
V
µA
µA
µA
kHz
kHz
Hz
Sec
V
V
V
V
kΩ
kΩ
V
V
V
V
PAD ASSIGNMENT
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.04.17
Page 2 of 21
SC3442
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal
a9
b9
a10
b10
a11
b11
a12
b12
a13
b13
COM3
COM2
KI4
KI8
GND
V
DD
DEN
KI1
KI2
COM1
LCD
LCD
LCD
LCD
LCD
LCD
No Connection
No Connection
LCD
LCD
Common Signal 3
Common 2
Key Input 4
Key Input 8
Ground
V
DD
(+3V)
Dump Enable
Key Input 1
Key Input 2
Common Signal 1
Description
Pin No.
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Signal
COM4
a0(KO)
b0(KO)
a1(KO)
b1(KO)
a2(KO)
b2(KO)
a3(KO)
b3(KO)
a4(KO)
b4(KO)
a5(KO)
b5(KO)
a6(KO)
b6(KO)
a7
b7
a8
b8
Description
Common Signal 4
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD (Key Output)
LCD
LCD
LCD
LCD
KEY CONNECTIONS
KI8
14
1st F
29
30
31
32
33
34
35
36
37
38
39
40
41
42
1
4
7
+/-
DEG
DMS
D
x
0
=
)
M
%
∑
x
∑
x
2
δ
KI4
13
HEX
STAT
1st F
2nd F
+
n
X
s
DATA
X
6
9
(
BIN
OCT
x
y
F
b
x
2
a
tan
E
DEC
2nd F
HEX
1st F
OFF
CE
KI2
26
2nd F
HEX
ON/C
KI1
25
STAT
21or44
2nd F
n!
CPLX
TAB
xy
1/x
r
θ
tan
-1
3
RM
M+
--
3
CD
HEX
RND
2
5
8
y
x
EXP
hyp
x
C
cos
log
y
π
cos
-1
10
x
e
x
sin
-1
DRG
F
E
B
A
in
sin
DRG
archyp
Note:
= Statistic Mode Keys
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.04.17
Page 3 of 21
SC3442
BASIC SPECIFICATIONS
1. NUMBER OF DISPLAY DIGITS
•
10-digit display and 14 kinds of special displays
•
Engineering display
•
Max mantissa 8 digits plus exponent 2 digits plus each negative code digit
•
Normal display
Max. 10 mantissa digits plus 1 negative code 6 digit
2. CLASSIFICATION OF OPERATION MODE
The following 6 types of operation mode are set by the 2ndF key and below keys:
2ndF STAT: Statistic calculation modes are set
2ndF CPLX: Complex number calculation mode set
2ndF - BIN: Binary mode set
2ndF - OCT: Octal mode set
2ndF - HEX: Hexadecimal mode set
2ndF - DEC: Decimal mode set
3. KINDS OF KEYS AND CLASSIFICATION OF THE MULTI-FUNCTIONS FOR ALL 42 TOUCH KEYS
STAT
2ndF
archyp
hyp
DMS D
DEG
π
DRG
DRG
sin
-1
sin
e
x
In
x
POWER
OFF
cos
-1
cos
tan
-1
tan
F
log
r
θ
a
1/x
x
2
x
(
BIN
x
x
DCT
x
HEX
-
DEC
+
s
RM
DATA CD
M+
%
=
TAB
F
E
xy
b
y
ON/C
n!
CE
CPLX
E
10
x
A
EXP
Y
y
x
B
3
x
x
C
n
)
∑
x
∑
x
2
7
8
9
M
δ
4
5
6
1
2
3
RND
0
+/-
4. THE CONDITION DURING CALCULATION
No key input is allowed and no data is displayed during calculation.
5. DISPLAY METHOD
a. Set number and result of operation are displayed in the right margin, minus floating.
b. Display of decimal number operation results.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.04.17
Page 4 of 21
SC3442
Display is made according to the display format that has been set by the F↔E key.
•
Floating mode
10
10
≤x≤10
100
10
≤x≤10
-99
-9
: Exponent display.
: Exponent display.
: Floating display.
0 and 10
-
9
≤x≤10
10
•
Engineering mode
0 and 10
-99
≤x≤10
100
(all ranges); Exponent display.
The F↔E key also converts the display format of a displayed numerical value simultaneously with the
display format setting.
At the same time, the number of digits below the decimal point of the above modes follows the display
format assigned by the 2dnF and F↔E keys.
Further, in the same manner as the F↔E key, the conversion is also takes place simultaneously with the
display format setting.
When the number of digits is specified, the last digit displayed is a rounded number, and when there is no
specification of the number of digits, the last digit displayed is a cut number.
Example:
2
7
=
0.285714285
TAB
2ndF
F
E
3
0.286
F
E
2.857-01
2ndF
F
E
2.8571428-01
c. Negative number are not displayed with the minus symbol “ but ate displayed in hexadecimal, octal, and
−”
binary two’ complements.
s
d. Display style and special display
Display style
Special display
2ndF
HYP
DEG
RAD
GRAD( )
BIN
OCT
HEX
CPLX
STAT
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2007.04.17
Page 5 of 21
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