IZ1239M single chip CMOS with 8-digit arithmetic operation, single mem
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IZ1239M DIGITS CURENCY CALCULATOR
IZ1239M single chip CMOS with 8-digit arithmetic operation, single memory, extraction-of-square-root, percentage calculation auto power function, designed operation with 1.5V power supply. IZ1239M special keys (C1, currency exchange calculations special memory save currency rate. result currency exchange operations formatted decimal always rounded exceeds decimal. FUNCTIONS Four standard functions result currency exchange operation rounded decimal Auto constant calculations Mark-up mark-down calculations Percentage calculations Chain multiplication division Power calculations Rough estimate calculations Clear key: ON/C, Currency exchange calculations Currency Currency Currency Currency FEATURES Single chip CMOS construction Floating decimal point direct drive Special memory currency rates Overflow indication: On-chip oscillator components Mirror Punctuation comma Auto Power Saving special memory contents when auto power Accumulating memory: Currencies SMR, Rate indication Rounded function (option) Formatting function Bare chip available
ABSOLUTE MAXIMUM RATINGS 25oC Characteristic Terminal Voltage Supply Voltage (Battery) Operating Temperature Storage Temperature Symbol Tstg Value Unit
IZ1239M
ELECTRICAL CHARACTERISTICS
1.5V, unless otherwise specified)
Characteristic Operating Voltage Input Voltage (Pins Input Current (Pins Output Voltage (P1, A2~A5) Output Voltage Display Frequency Symbol IOFF IDIS Test Condition 0.15 0.15 2.80 1.30 2.95 1.50 1.70 0.20 Unit
Supply Current
without load 15µA without load without load without load 1.3V while display display 1.3V while display 1.1V, while operation
OUTPUT WAVEFORM
OUTPUT WAVEFORM
FUNCTIONAL DESCRIPTION Decimal point system Complete floating decimal point system. digits leading zero suppression. Zero shift. currency exchange operations result formatted decimal. Symbols negative number display error display punctuation comma non-zero memory indicator currency exchange operations indicator RATE special memory indicator
IZ1239M
Error detection System errors occur when: division zero. extraction square root negative number. Rough estimate calculation error occur when integral part result standard functions, percentage, square, reciprocal, power calculations exceed digits. Error indication System error indicated 1-digit position sign-digit position. Rough estimate calculation error high-order 8-digit calculation result indicated together with "E". decimal point indicated position corresponding calculation result time zero shift performed Error release System error system error release ON/C key. Rough estimate calculation error rough estimate calculation error released ON/C, key. Number entry Numerical entered digits. Numerical entries equal digits more ignored. Memory protection error detection, special memory content retained when auto power off. bounce protection Front edge Down word about words. Trailing edge words word 3.3ms when display frequency 100Hz. Option rounding formatting functions enabled when opened connected disabled when connected VSS. During special memory recall icon RATE only opened connected icons RATE, connected VSS. Auto power Power automatically turns after minutes pass from last pressure. special memory content saving when power auto off.
IZ1239M
CONNECTION
a1b1 a2b2 a3b3 a4b4 a5b5 a6b6 a7b7 a8b8
Mirror with IZ1239M
DESCRIPTION
Numerals input keys
Decimal point key, Sign change key, Enter
Clear keys
ON/C: Power ON/All clear (system reset) except special memory contents Entry clear such only entered data cleared
Four standard function keys
Percent
Currency exchange keys
Entered Data multiplied (when press divided (when press currency rate (content special memory). During this operation icon
Currency rate C1/C2 (Entered Data setted into special memory this key). Recall special memory. When press icon RATE
Recall memory, clear memory, recall clear memory
RATE
IZ1239M
APPLICATION CIRCUIT (mirror LCD)
RATE
a1-a5, b1-b4, c1-c4
a6-a8, b5-b8, c5-c8
IZ1239M
1.5V
0.1µF 0.1µF
33µF
ON/C
NOTE: Chip substrate must floating connected
IZ1239M
DIAGRAM
LOCATION
Name Description Option Option Power supply Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output -1070 -1070 -1070 -1070 -1070 -1070 -1070 -1070 -1070 -1070 -1070 -915 -765 -615 -465 -315 -165 -810 -650 -470 -300 -130 1090 1090 1090 1090 1090 1090 1090 1090 1090 1090 1090 1090 1090 Name Description Display output Display output Display output Display output Display output Display output Display output Ground Capacitor terminal Capacitor terminal Capacitor terminal Connection Connection input input Strobe output Strobe output Strobe output Strobe output Strobe output Strobe output input input input 1050 1070 1070 1070 1070 1070 1070 1070 1070 1070 1070 1050 -135 -285 -435 -585 -735 -885 -1050 1070 -225 -485 -765 -915 -1070 -1090 -1090 -1090 -1090 -1090 -1090 -1090 -1090 -1090 -1090 -1090 -1050
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