SC3423

Silan Semiconductors 8-DIGIT CALCULATOR DESCRIPTION The SC3423 is a single-chip LSI CMOS calculator with 8-digit four function arithmetic operations, single memory, extraction of square root and percentage calculation functions, leading zero and trailing zero suppression, chain calculations and internal debouncing and encoding of keyboard inputs. It is designed for LCD operation with 3.0V power supply (either from solar cell or battery), auto-power off, low power dissipation and single power supply making the SC3423 ideal for hand held calculators with low system cost. SC3423 46 45 44 43 42 41 40 39 38 37 36 35 47 33 1 32 2 31 3 30 4 29 5 28 6 27 7 8 26 9 25 10 24 11 12 13 14 15 16 17 18 19 20 21 22 23 FEATURES * Number of digits - 8 digits (rough estimated calculation is possible). * Calculations: - Standard four functions (+ , - , x , +). - Chain multiplication and division. - Auto-constant calculation (constant multiplicand, divisor, addend and subtrahend). - Square and reciprocal calculations. - Extraction of square root. - Percentage calculations. - Power calculations. - Rough estimate calculations. - Memory calculations. * Decimal point system-complete floating decimal point system. * Negative number indication: number + minus (-) sign. SC3423 chip topography * Display format: 8 digits & sign (-, E & M) leading zero suppression zero shift. * Touch tone function and display. * Punctuation comma display. * Auto power off ability. ORDERING INFORMATIOM SC3423 SC3424 SC3425 SC3426 Has on Chip Oscillator Resistor Pinning Mirrored Type of SC3423 No Oscillator Resistor Pinning Mirrored Type of SC3425 ABSOLUTE MAXIMUM RATING Characteristic Supply Voltage Input Voltage (Note: 1) (Note: 2) Symbol VDD - VSS VIN Rf TSTG TOPT Value -0.3 ~ +3.5 -0.3 ~ VDD + 0.3 560f5% -55 ~ +125 0 ~ + 50 Unit V V K¡ °C °C Resistance for CG Storage temperature Operating Temperature Note: 1.Maximum voltage on any pin with respect to the Vss. 2.Resistor value for CG is varied according to the floating capacitance on a printed circuit board. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 1 Silan Semiconductors PAD ASSIGNMENT S1 S2 VDD H1 a1 b1 c1 a2 b2 c2 a3 b3 CGIN K4 K6 K5 P1 P2 A5 A4 A3 A2 K2 K3 SC3423 46 45 44 43 42 41 40 39 38 37 36 35 47 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 33 32 31 30 Ti Po VSS H3 H2 a9 c8 b8 a8 c7 b7 SC3423 29 28 27 26 25 24 23 b5 c5 a4 b4 a5 a6 Note: The IC substrate should be connected to VDD in the PCB layout artwork. ELECTRICAL CHARACTERISTICS (Ta=25°C, VDD =3.0V,Unless otherwise specified) Parameter Input Voltage 1 ( Note: 3 ) Input Voltage 2 ( Note: 4 ) Input Current 1 ( Note: 5 ) Input Current 2 ( Note: 6 ) Input Current 3 ( Note: 4 ) Input Current 3 ( Note: 4 ) Output Voltage 1 ( Note: 7 ) Symbo l VIH1 VIL1 VIH2 VIL2 IIH1 IIL1 IIH2 IIL2 IIH3 IIL3 IIH3 IIL3 VOL1 VOA VOB VOC FD IOL IOH IDD Test conditions Min VDD-0.4 -VDD-0.4 -- a7 b6 c3 c4 c6 Typ -----5.5 ---10 30 ---2.95 1.50 0 75 1.5 1.3 -20 Max -0.4 -0.2 1 10 1 1 1 15 40 1 -0.15 -1.70 0.20 ---0.1 30 Unit V V µA µA µA µA V VIN=VDD VIN=0V VIN=VDD VIN=0V VIN=VDD VIN=0V VIN=VDD VIN=0V IOUT=15µA without load without load without load VDD=3V, display on, Rf=560k VDD=3V, VOL=0.5V,TI=3V VDD=3V, VOH=2.5V,TI=0V Display off, ( Note: 9 ) S2=VSS S2= VDD -----5 20 -VDD – 0.15 -2.80 1.30 -50 1.0 1.0 --- VOH1 without load Output Voltage 2 ( Note: 8 ) Display Frequency ( Note: 8 ) Touch Tone Output Drive Current ( Note: 11 ) Dissipation Current V Hz mA µA VDD1 VDD=3V, display on, ( Note: 10 ) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 2 Silan Semiconductors Note: 3. Applies to Pins K2 – K6, TI and S2. 4. Applies to Pin S1. 5. Applies to Pins K2 ~ K6 and TI. 6. Applies to Pin S2. 7. Applies to P1, P2, A2 ~ A5. 8. Applies to H1 ~ H3, a1 ~ a9, b1 ~ b8, c1 ~ c8. 9. Measured by the next test circuit after powe supply automatically yurns off. 10. Measured by the next test circuit while “0” is being displayed after auto-clear operation and while key is not being depressed. 11. Applies to PO SC3423 32 2 SC3423 VSS 34 35 1 47 µA + VDD IDD Test Circuit Rf=560k +/- 5% VSS OUTPUT WAVEFORM 1; Hi VOA VOB T VOC Fd=1/T VOA OUTPUT WAVEFORM 2 ai, bi, ci VOC PIN DESCRIPTION Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Symbol I/O S2 VDD H1 a1 b1 c1 a2 b2 c2 a3 b3 c3 a4 b4 c4 a5 b5 c5 a6 b6 c6 a7 b7 c7 I -O O O O O O O O O O O O O O O O O O O O O O Description APO(Auto Power Off) input Power Supply Display Output (Common) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Segment) Pin No. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Symbol I/O a8 b8 c8 a9 H2 H3 VSS Po Ti CGout CGin K3 K2 A2 A3 A4 A5 P2 P1 K5 K6 K4 S1 O O O O O O -O I O I I I O O O O O O I I I I Description Display Output (Common) Display Output (Segment) Display Output (Segment) Display Output (Segment) Display Output (Common) Display Output (Common) Ground Piezo Output Test Input Resistor terminal for CG Resistor terminal for CG Key input Key input Strobe output Strobe output Strobe output Strobe output Strobe output Strobe output Key input Key input Key input HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 3 Silan Semiconductors FUNCTIONAL DESCRIPTION 1. LCD DISPLAY Display Format Numericals Font SC3423 Sign Font Memory minus Punctuation Touch tone indicator Error LCD Connection H2 H3 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 LCD Driving System 1/2 bias, 1/3 duty Display Configuration Segment Electrode Side a9 c8 a8 b8 c7 a7 b7 c6 a6 b6 c5 a5 b5 c4 a4 b4 c3 a3 b3 c2 a2 b2 c1 a1 b1 Common Electrode Side H1 H2 H3 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 4 Silan Semiconductors Display Example No. “8” ON OR OFF WAVEFORM T1 V2 H3 V1 V0 V2 V1 H2 V0 V2 V1 H1 V0 V2 ai V1 V0 V2 bi V1 "ON" V0 ci V2 V1 V0 "OFF" ai.bi.ci V2 V1 V0 a b c "OFF" ai.bi.ci bi V1 "ON" V0 ci V2 V1 V0 V2 V1 V0 a b ai H2 V0 V2 V1 H1 V0 V2 V1 V0 V2 T2 T3 T4 T5 T6 V2 H3 V1 V0 V2 V1 SC3423 No. “5” ON OR OFF WAVEFORM T1 T2 T3 T4 T5 T6 c (H1 H2 H3) (H1 H2 H3) (H1 H2 H3) H3) (H1 H2 H3) 0 0 0 0 1 1 1 1 1 0 1 0 1 1 1 (H1 H2 H3) (H1 H2 1 1 1 2. KEYBOARD DESCRIPTIONS a) Equal Key (=) i) Performs Keyed-in operation and maintains that operation for possible use. ii) Establishes power/reciprocation calculation. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 5 Silan Semiconductors b) Multiplication Key (x) i) Enters multiplicand. ii) Performs previous operation and displays result. c) Division Key (÷) i) Enters dividend. ii) Performs previous operation and displays result. d) Addition Key (+) i) Conditions machine for an addition. ii) Performs previous operation and displays result. e) Subtraction Key (-) i) Conditions machine for a subtraction. ii) Performs previous operation and displays result. f) Percent Key (%) SC3423 The purpose of the percent key is to allow for calculation of add-on and discount. Deter mination of add-on requires the principal amount to be the first entry followed by the "+" or "x" key, with the percentage being the second entry. Depression of the percent key yields the amount to add on, such as tax or interest. Depression of the "=" key adds this amount to the principal. g) Change Sign Key (+/-) Pushing the "+/-" key twice in succession causes the corresponding sign to appear and disappear. During digit entry; this function changes the sign of the entered factor. h) Power On/All Clear Key (ON/AC) i) First push power-on displays "0". ii) In the middle of a digit entry, a second push will clear all registers and memory. i) Clear Entry/Clear Key (CE/C) i) During the digit entry, the first depression will clear the entry register. And display the previous enter number again. ii) The second push will clear all registers except memory. j) Clear Entry Key (CE) During the digit entry will clear the entry register and display number "0". k) Square Root Key ( ) Extracts the square root of a positive number displayed in the entry register. I) Memory Plus Key (M+) i) Adds the current display to the contents of memory. ii) It will terminate a number entry. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 6 Silan Semiconductors m) Memory Minus Key (M-) i) Subtracts the current display from the contents of memory ii) It will terminate a number entry. n) Memory Recall and Clear Key (RCM) SC3423 i) First push, as RM key, transfers the contents of the memory register into the display register. ii) Second push, as CM key, clears the memory. o) Number, Decimal Key ("O - 9", "•") The First number key in a sequence will clear the display and enter the digit in the display. Successive entries will shift the display left and enters the data in display register. The first decimal point entered is effective. An attempted entry of more than 8 digits or 7 decimal places will be ignored. p) Touch Tone ( ) Key i) When power is ON, the touchtone function is enable and the beep sound is generated output during 125ms and sign is displayed on LCD. ii) Selection of touchtone function is toggled by touchtone key. iii) Output waveform. fT=2kHz VOA VOC 125ms 3. ERROR CONDITIONS a). Error Detection System errors occur when: i) The integral part of any calculation result exceeds 16 digits. ii) The integral part of any memory calculation result exceeds 8-digit or when the integral part of any addend or subtrahend to memory exceeds 8-digit. iii) The integral part of a mark-up and markdown calculation result exceeds 8-digit. iv) A division by zero is attempted. v) An extraction of the square root of a negative number is attempted. Rough Estimate Calculation results occur when: The integral part of the result of any one of the standard four functions, percentage, square, reciprocal, and power calculations exceeds 8-digit and is equal to 16-digit or less. b). Error Indication i) System error: "0” is indicated in the first-digit position and "E" in the sign-digit position. ii) Rough Estimate Calculation result: HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 7 Silan Semiconductors SC3423 The high-order 8-digit of a calculation result is indicated together with "E". The location of the decimal point corresponds to the result of calculation times le-8, and no zero shift is performed. c). Error Release i) System error: A system error can be released by depressing ON/AC key. ii) Rough Estimate Calculation result: A rough estimate calculation error can be released by depressing the ON/AC or CE/C key. However the calculation result is not cleared by CE/C key but is retained. 4. OPERATION CHARACTERISTICS a) Constant Operation The SC3423 has implied constant mode on +, -, x, ÷, &, % operations. The constant is performed automatically by the "=" key, "%" key, or "%" key without a constant for addition, subtraction and division while the first operand is the constant for multiplication. b) Number Entry Numbericals can be entered up to 8-digit. Entries equal to 9-digit or more are ignored. c) Memory Protection In any error detection, the memory contents present before the error detection are protected. d) Memory Indication If the memory contents are a number other than zero, "M" is indicated in the sign-digit position. e) Auto Power Off If no key is depressed for a specific period of time, the power supply will automatically turn off. This time interval up to power-off is 131,072 words (Approximately equal to 14 minutes and 24 seconds at Fd= 52 Hz, the display time of a word being equal to 6ms when Fd= 52 Hz). 3V 1.5V 0V 1/Fd (3 Word cycles) Output waveform example f) Double Key Depression The order of priority, when two keys are depressed simultaneously is as follows : OFF -> ON/AC -> CE/C -> 5 -> 6 -> 4 -> ROM -> · -> 9 x 10 8 a+b = = x 1/a2 (a+b) c/d ((a+b) c/d) e/10 8E ((a+b) c/d) e/10 8 xe= CE/C Memory Calculations at |(a+b)C(c/d)Ce|>10 8 a M+ b MRM CM a + b M+ c x d M+ RM e M+ CE/E RM aM bM a - bM a-b a + bM c dM a+b+c dM 0M E 0M a+b+c dM a a-b a-b 0 a+b a+b+c d a+b+c d a+b+c d a+b+c d a+b+c d HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 10 Silan Semiconductors APPLICATION CIRCUITS SC3423 H2 H3 b7 a7 b6 a6 b5 a5 b4 a4 23 22 21 20 19 18 17 16 15 14 13 12 11 c7 a8 b8 c8 a9 H2 H3 VSS PO C9011 BEZZ +3V Ti 24 25 26 27 28 29 30 31 32 33 10 9 8 7 6 a3 c2 b2 a2 c1 b1 a1 H1 VDD S2 S1 47µf VDD +3V SC3423 35 36 37 38 39 40 41 42 43 44 45 46 CGIN K3 K2 A2 A3 A4 A5 P2 P1 K5 K6 K4 Auto Power Off Condition Pin S1 APO Enable L H APO Disable H L b3 c6 c5 c4 c3 5 4 3 2 1 47 H1 a9 b8 a8 b7 a7 b6 a6 b5 a5 b4 a4 b3 a3 b2 a2 b1 a1 c8 c7 c6 c5 c4 c3 c2 c1 3 2 1 6 5 4 9 8 CM + CE MRM % x ON/C S2 OFF M+ +/= ON/CE 0 RCM 7 Note: 1. The Pad 34 (CGout) 2. While using is deleted in SC3423 die. SC3425, please connect a 560k¡f5% resistor between Pad 34 and Pad 35. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 11 Silan Semiconductors CHIP TOPOGRAPHY SC3423 CGI N 35 K4 46 S1 S2 VDD H1 a1 b1 c1 a2 b2 c2 a3 b3 47 1 2 3 4 5 6 7 8 9 10 11 K6 45 K5 44 P1 43 P2 42 A5 41 A4 40 A3 39 A2 38 K2 37 K3 36 33 32 31 30 29 28 27 26 25 24 12 c3 13 a4 14 b4 15 c4 16 a5 17 b5 18 c5 19 a6 20 b6 21 c6 22 a7 23 Ti Po VSS H3 H2 a9 c8 b8 a8 c7 b7 Chip Size : 1.630 x 1.640 (mm 2 ) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 12 Silan Semiconductors PAD COORDINATES (Unit: µm) SC3423 (SC3423) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Symbol S2 VDD H1 a1 b1 c1 a2 b2 c2 a3 b3 c3 a4 b4 c4 a5 b5 c5 a6 b6 c6 a7 b7 c7 X -755 -755 -755 -755 -755 -755 -755 -755 -755 -755 -755 -630 -505 -380 -255 -125 -0 125 250 375 505 630 755 755 Y 505 380 255 130 0 -125 -250 -375 -500 -630 -765 -765 -765 -765 -765 -765 -765 -765 -765 -765 -765 -765 -755 -625 Pin No. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Symbol a8 b8 c8 a9 H2 H3 VSS Po Ti CGout CGin K3 K2 A2 A3 A4 A5 P2 P1 K5 K6 K4 S1 X 755 755 755 755 755 755 755 755 755 Y -500 -375 -250 -120 5 130 255 380 510 665 540 415 285 160 35 -90 -215 -340 -470 -595 -755 -755 760 760 760 760 760 760 760 760 760 760 760 760 630 Note: The original point of the coordinate is the die center. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2000.12.31 13