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SC3442 Schematic ( PDF Datasheet ) - Silan Semiconductors

Teilenummer SC3442
Beschreibung SCIENTIFIC 10-DIGITS LCD CALCULATOR
Hersteller Silan Semiconductors
Logo Silan Semiconductors Logo 




Gesamt 21 Seiten
SC3442 Datasheet, Funktion
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 Memory
– Minus
GRAD
()
Gradient
Parenthesis
ORDERING INFORMATION
E Error
BIN Binary mode
2ndF 2nd Function
OCT
Octal mode
HYP Hyperbolic
HEX
Hexadecimal mode
DEG Degree
CMX
Complex number mode
RAD Radian
STAT Statistic calculation mode
* 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
* 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
VDD=3.0V single power supply.
FE key.
ABCOLUTE MAXIMUM RATINGS
Characteristics
Terminal Voltage
Operating Temperature
Storage Temperature
Symbol
VDD
VIN
Topr
Tstg
Value
-0.3 ~ +5.0
-0.3 ~ VDD+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 Datasheet, Funktion
e. Examples of display
Floating of -6000 1/x; TAB=7
SC3442
Same as above, engineering display
Error display
DEG
E
6. PROTECTION
a. Memory overflow protection
If the overflow occurs in the memory calculation, the data before the calculation is retained.
b. Statistical overflow protection
If the overflow occurs in the statistical calculation, the data before the calculation is retained.
7. THE NUMBER OF DIGITS OF THE INTERNAL RETAINED DATA.
The number of the digits of the mantissa of the displayed data is a maximum of 10 digits, but the available data
for successive calculations is the internally retained data.
The number of digits of the mantissa of internally retained data is as follows:
a. Data input
Maximum
10 digits
b. Arithmetic
Maximum
10 digits
c. Engineering function
d. Statistical function
e. Complex number function
f. Memory calculation
g. Number of random
Maximum
3 digits
8. AUTO CLEAR
When the power supply is suddenly turned on an auto clear routine is executed to initialize as DEC mode, no
TAB, floating, and DEG modes.
9. POWER OFF FUNCTION
a. Auto power off
About 7.5 minutes after operation is ended by pressing the key, the power supply is turned off.
b. OFF
Pressing this key will stop the oscillator. (Memory safe guard)
c. ON
Pressing this key will wake the oscillator and initialize.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2007.04.17
Page 6 of 21

6 Page









SC3442 pdf, datenblatt
SC3442
17. BINARY MODE (2NDF, BIN, 0, 1)
a. Data input and output are both binary integers in a maximum of 10 digits.
b. A negative number is expressed in binary number of two’s complement.
c. The range of internal operation is as shown below and if the result of the operation exceed the range, it
becomes an error (overflow)
Binary Number
Decimal Number
Outside the operation range
512DATA
111111111
511
111111110
510
Binary
Positive
Integer
111111101
:
:
10
509
:
:
2
11
00
111111111
-1
Binary
Positive
Integer
(Complement)
111111110
111111101
::
::
100000001
-2
-3
:
:
-511
100000000
-512
Outside the operation range
-512DATA
18. OCTAL MODE (2NDF, OCT, 0~7)
a. Data input and output are both octal integers with a maximum of 10 digits.
b. A negative number is expressed in the octal number display of two’s complement.
c. The range of internal operation is as shown below and if the result of the operation exceeds the rang, it
becomes an error (overflow)
Octal Number
Decimal Number
Outside the operation range
5 3 6 8 7 0 9 1 2DATA
3777777777
536870911
Binary
Positive
Integer
3777777776
:
:
1
536870910
:
:
1
00
777777777
-1
Octal
Positive
Integer
(Complement)
777777776
111111101
::
::
4000000001
-2
:
:
-5 3 6 8 7 0 9 1 1
4 0 0 0 0 0 0 0 0 0 -5 3 6 8 7 0 9 1 2
Outside the operation range
- 5 3 6 8 7 0 9 1 3DATA
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2007.04.17
Page 12 of 21

12 Page





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