IZ1225M single chip CMOS with 8-digit arithmetic operation, single mem

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IZ1225M single chip CMOS with 8-digit arithmetic operation, single mem

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IZ1225M BASIC FUNCTION 8-DIGITS CALCULATOR WITH TOUCH TONE PUNCTUATION FUNCTION
IZ1225M single chip CMOS with 8-digit arithmetic operation, single memory, extraction-of-square-root, percentage calculation auto power punctuation touch tone function, designed operation with 1.5V power supply. FUNCTIONS Four standard functions Auto constant calculations (constant: multiplicand, divisor, addend subtrahend) Square reciprocal calculations Mark-up mark-down calculations Extraction square root Percentage calculations Chain multiplication division Power calculations Rough estimate calculations Touch tone function Punctuation comma display Clear key: ON/C, ON/CE, ABSOLUTE MAXIMUM RATINGS 25oC)
Characteristic
FEATURES Single chip CMOS construction Floating decimal point direct drive Overflow indication: Accumulating memory: RM/CM bare chip available Mirror type
Symbol
Value
Unit
Note
Terminal Voltage Supply Voltage Operating Temperature Storage Temperature
TOPR Tstg
Note: Maximum voltage with respect
IZ1225M
ELECTRICAL CHARACTERISTICS 25oC, 3.0V, unless otherwise specified)
Characteristic Input Voltage Input Voltage (S1) Symbol VIH1 VIL1 VIH2 VIL2 IIH1 IIL1 IIH2 IIL2 IIH3 IIL3 IIH4 IIL4 VOH1 VOL1 Display Frequency Touch Tone (PO) Output Drive Current Dissipation IOFF Idis S2=GN without load IOUT 15µA without load without load without load 1.5V while display 1.5V, 0.5V, 1.5V, 0.5V, Display off, 1.5V while display Test Condition Unit
Output Voltage (P1, A2~A5) Output Voltage
0.15 0.15 2.80 1.30 2.95 1.50 1.70 0.20
NOTE: Measured next test circuit after power supply automatically turns off. Measured next test circuit while being displayed after auto clear operation while being depressed.
OUTPUT WAVEFORM
OUTPUT WAVEFORM
Input Current (S1)
Input Current (S1)
Input Current (S2)
Input Current
IZ1225M
FUNCTIONAL DESCRIPTION
Decimal point system Complete floating decimal point system. Integral number digits leading zero suppression. Zero shift. Symbols negative number display error display memory display punctuation comma touch tone indicator
Error detections System errors occur when: integral part memory calculation result exceeds digits. division zero. extraction square root negative number. Rough estimate calculation error 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 10-8, zero shift performed Error release System error system error release ON/C ON/CE key. Rough estimate calculation error rough estimate calculation error released ON/C, ON/CE, key. calculation result cleared ON/CE, retained. Number entry Numerical entered digits. Numerical entries equal digits more ignored.
IZ1225M
Memory protection error detection, memory content retained. Memory indication memory content zero, indicated sign-digit position. Doubler depression order priority when keys being depressed simultaneously, follows:
When ON/C depressed simultaneously, given priority. bounce protection Front edge Down word about words.
Trailing edge words word 3.3ms when display frequency 100Hz. DISPLAY FONTS Numericals font
Sigh font
URWDFLGQL HQRW KFXRW QRLWDXWFQXS VXQLP URUUH
MC/MR
\URPH0
IZ1225M
connector
b8a8
b7a7
b5a5
b4a4
b3a3
b2a2
b1a1
AUTO POWER Power automatically turns after minutes pass from last pressure. Low, High) ON/C operations except memory content cleared ON/C key. TOUCH TONE When power touch tone function enable beep sound generated output during 125ms sing displayed LCD. Selection touch tone function toggled touch tone key. Output wave form.
2KHz
MARK-UP MARK-DOWN CALCULATION Mark-up mark-down calculation performed follows.
ENTRY +OR= AB/100 DISPLAY AB/100 AB/100 A+AB/100 -AB/100
8c-5c ,8b-5b ,9a-6a
APPLICATION CIRCUIT
IZ1225M
21ZI
4c-1c ,4b-1b ,5a-1a
C/NO
IZ1225M
DIAGRAM
1080 1230 1380 1530 1680 1830 1995 2150 2280
2150
2150
1910 1760 1610 1460 1310 1160 1010
1955 1785 1655 1505 1355 1205
Z1225MR (CHI Chip Size:: 2280 2280 Size: Unit:
(0,0)
1025 1185 1345 1495 1645 1795
2150
IZ1225M
DESCRIPTION Ground COMMON COMMON Display output Display output Display output Display output Display output
Description
Piezo output input input input Strobe output Strobe output Strobe output Strobe output Strobe output Strobe output input input Test input
Name
Description 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 COMMON Power supply Test

IZ1225M single chip CMOS with 8-digit arithmetic operation, single mem

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