T9790U

T9790U TOSHIBA | Alldatasheet

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TOSHIBA CMOS DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC T9790U CMOS 1 CHIP LSI FOR LCD ELECTRONIC CALCULATOR The T9790U is a 1 chip microcomputer for 8-digits 1- memory electronic calculator. T9790U can drive the liquid crystal display (LCD). Single power supply operation, low power consumption make it suitable for single battery operated pocketable calculator. w Ms —— pS FEATURES FU © 8 digits of data and 1 symbol digit for calculator. @ Algebraic calculation mode. QFP44-P-1010-0.80 @ Punctuation. Weight : 0.34g (Typ.) @ Standard 4 functions(+, -, x, +), mark up percent with automatic add-on /discount, automatic constant calculations, chain calculations, memory calculations with memory overflow protection. @ Internal keyboard decoding and denouncing. © Complementary output buffer for direct driving of liquid crystal display (LCD : FEM type 3.0V, 1/2 bias, 1/3 duty). @ Single power supply (1.4V typ.) . ©@ Quad in line flat package (44 PIN) . @ Very low power consumption (2.66W typ. at wait) . © Very wide range of operating voltage (Vpp = 1.1~1.9V) . @ Automatic power off (A time for about 7 min.) . 980910EBA2 @ TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fall due to thei inherent electrical sensitivity and, vulnerability to physical stress. itis the responsibilty of the buyer, when utlizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of human life, bodily injury or damage to property. In developing your, designs, please ensure that TOSHIBA. products are, used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook @ The products described in this document are subject to the foreign exchange and foreign trade laws. © ‘he information contained herein is presented only as a guide for the applications, of our products. No_ responsibilty is assumed by, TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. e The information contained herein is subject to change without notice. 1998-12-02 1/23

« A s T9790U 5 a (ror view nt As cOM1 88 com2 71] 8 es coms > Ne ee8lies Nc 253s 50 SP PIE 12:13 P 2 iP & € FS F&F F SF F&F F Fe FC EF arora orLara(tartar tartare C1=€2=0.1pF bod bef ively bly by eS bel ely Ey Ly EE Pin Select [eo] Vpp Level Memory Hold ON Leo ES eve == mary Hold OFF NOTE INPUT capacity<400 (pF) at Vpp = 1.4 (V) Key resistance<3 (kQ) at Vpp = 1.4 (V) 1998-12-02 2/23

SMISeee) Z2eeSLSFISSEL? Ne Ne AG (ey Be 82 « A T9790U a 87 8 G (ToP view A Ag comt 8g com2 Ce cOM3 "Ye e@lie. we] e8soc8F err 213 a 2 Ie SF FS F & F&F F&F & BE SF F EF aA | rarer artarararatt _ bel bly edly sy be bly ely Gly Ey dy Ey) (1=02=0.1pF 3 = 10 nF Pin Select [eo] {Y0 bevel Memory Hold ON [eo] ee cove Memory Hold OF NOTE INPUT capacity<400 (pF) at Vpp = 1.4 (V) Key resistance<3 (kQ) at Vpp = 1.4 (V) 1998-12-02 3/23

Z2eeSLSFISSEL? Ne Ne AG (ey Be 82 « A T9790U a 87 8 G (ToP view Ay Ag comt 8g com2 Ce cOM3 me OTE ge Nel? e8soc8F err 213 a 2 iS SF 2 SF F F & & FF SF F F [Sa rarer tattartartaraftartartattars creconoapt belt bef edly bely bay ey tel Ely Ey Ey eG) 3 =10pF Pin Select [eo] {0 bevel Memory Hold ON Vsg Level Memory Hold OFF NOTE INPUT capacity<400 (pF) at Vpp = 1.4 (V) Key resistance<3 (kQ) at Vpp = 1.4 (V) 1998-12-02 4/23

wy yy | COMMON nin oto tno pin pin fig tn nia U0 U0~ Oe Oe OL, Bt, tt, tS KEY LAYOUT Ka kg & 8 Ag & 87 Ay % 86 46 6 85 AS Ca poet fe pede dete tee Pet |e a ee ee ee YbD Kt 1998-12-02 5/23

‘44 43 42 41 40 39 38 37 36 35 34 ia ol 33 INC ag Mz 32 C2

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oe? (ror view) 27H Ags 26 fl com 83 ho 25 i com2 Cg to 249 coms a 23 NC 42 13 14.15 16 17 18 19 20 21 22 Yegrespevee SOG SPECIFICATION OF CALCULATOR Operational Features (1) 8 digits of data and 1 symbol digit. (2) Algebraic mode. (3) Full floating point. (4) Standard 4 functions +, -, x, =. (5) | Memory calculation and memory hold. (6) Delta Percent, mark-up and mark-down functions. (7) | Percent with automatic add-on and discount. (8) | Constant calculation (Automatic constant) . (9) Chain calculation. (10) Leading zero suppression. (11) Trailing zero suppression. (12) Square root. (13) Change sign. 1998-12-02 6/23

(1) Numeral entry 8 digits (2) Addition / Subtraction 8 digits + (-) 8 digits=8 digits (3) Multiplication / Division 8 digitsx (+) 8 digits=8 digits (4) | Memory calculation 8 digits+ (-) 8 digits=8 digits Display Font 7. | rr Miadauerenoaan ErlLido'ittu tll tu, Overflow Condition (1) When division by zero is attempted, an overflow condition will result, and error symbol “E” and a zero are displayed. (2) | When the integer part of result exceeds 8 digits, the display will shown 8 most significant digits of result divided by 10*® and “E”. (3) | When the integer part of result exceeds 15 digits, display will show a zero and “E”. (4) When the integer part of result in memory register exceeds 8 digits at memory calculation, display will show a zero and “E", and previous data will be kept in memory register. (5) When an overflow occurs on the way of add-on/discount calculation, display will show a zero and “E”. (6) In overflow condition, any operation or numeral entry will be inhibited. Clearing Overflow Condition (1) The resulting overflow condition can be cleared by depressing [ON/C/CE] - (2) | At memory overflow condition, depression of or after [ON/C/CE] will recall the previous memory data. (3) At the condition of exceeding capacity overflow occurred in chain calculation, depression of [ON/C/CE] will reset the error symbol “E”, and you can continue the calculation using the displayed data. 1998-12-02 7/23

(1) Numeral entry 56.0~59.3ms (2) Addition 44191111 aii E] 102.6~105.9ms (3) Multiplication 1 99999999 [=] 258.6~261.9ms (4) Division 99999999 [+] 1 294.6~297.9ms (5) Memory Calculation 99999999 [=] 1 345.3~348.6ms (6) Percentage calculation 1 99999999 287.9~291.2ms (7) Square root 99999999 259.9~263.2ms Arithmetic Operations 1. Addition Key Op. Display A A A B B A+B c c E] A+B+C D D D E E D+E E] D+E 2. Subtraction (1) A A E] A B B al A-B c c E] A-B-C | A-B-C D D 9998-12-02 8/23

Key Op. Display | A-B-C+D E] - (A-B-C+D) 3. Multiplication (1) A A A B B El AB AB Cc Cc El AB+C @ E 0. A A B B E] -AB 4. Division (1) A A E] A B B EI AIB @ E 0. A A. E] -A B B E] -A/B 5. Power calculation (1) A A A 4998-12-02 9/23

Key Op. Display ES] a ES] a (2) A A E] A [=] V/A E] 1A 8 0. A A E] a E] ~~ @ El 0. A A E] -A E] -1/8 E] 1A (5) A A A ES] a a ES] at 6. Mixed calculation (1) A A A B B AB c c El AB+C D D 9998-12-02 10/23

Key Op. Display E] af ia E E = AB +C if 7. Constant calculation (1) A A A B B El AB c c [=] AC @ E 0. A A B B E] -AB Cc Cc E] -AC (3) A A E] A B B E] AIB Cc Cc E] C/B D D D ES] D? (4) A A A B B 9998-12-02 11/23

Key Op. Display E] A+B c c E] C+B (5) A A al A B B E] A-B c c El c-B (6) A A A B B El AB c c c D D El cD E E EI Ce CE F F E] CEF G G El G H H E] G/H ] ] E] W/H 1998-12-02 12/23

Key Op. Display (7) A A A B B A:B/100 c c A-C/100 D D E] D E E 100:D/E F F 100-F/E 8. Mark-up/ Discount calculator (1) A A A B B AB El A+AB (2) A A A B B | AB El A-AB (3) A A A B B A:B/100 A:B/100 E] A+A:B/100 1998-12-02 13/23

Key Op. Display (4) A A A B B A:B/100 El A:B/100 E] A-A:B/100 (5) A A A B B A+AB/100 (6) A A E] A B B A-AB/100 9. Memory calculation Key Op. Display Memory A A 0. A(M) A B B(M) A B(M) A+B c c(M) A+B =] c(M) A+B-C D D(M) A+B-C [ME ]or [ik] A+B-C(M) A+B-C or A+B-C 0. (2) A A 0. A 0. B B 0. A+B(M) A+B 4998-12-02 14/23

Key Op. Display Memory A+B(M) A+B A+B(M) 2(A+B) c c(M) 2(A+B) M-] c(M) 2(A+B) -C (3) A A 0. A 0. B B 0. A:B(M) AB c c(M) AB c(M) AB D D(M) AB =] c-D(M) AB -CD [MB] or (a A-B-C-D(M) AB-CD [M=] AB-CD 0. (4) A A 0. A 0. B B 0. E] AB 0. c c 0. c(M) c E] A-C (M) c D D(M) c =] D(M) c-D E] A-D (M) c-D (5) A A 0. A(M) A B B(M) A B(M) A+B or A+B(M) A+B 8998-12-02 15/23

Key Op. Display Memory A+B(M) A+B or A+B(M) A+B (A +B)2(M) A+B c c(M) A+B E] (A+B)? +C(M) A+B (6) 1.0000001 1.0000001 0. 1.000001 (M) 1,0000001 99999999 99999999. (M) 1.000001 0. (M) 1.0000001 0.(M) 1.0000001 or 10000001 (M) 1,0000001 10.Square root (1) A A Va B B (2) A A A B B VE E] AVE (3) A A A Va B B E] AB @ E& 0. A A E] -A VALE) 8998-12-02 10/23

Key Op. Display Memory (5) A A 0. A(M) A [MB or A(M) A Ea] A(M) A B B(M) A -B(M) A vBiM) A 0.(M) A 11.Percentage calculation (1) A A A B B A-B/100 c c A-C/100 D D A:D/100 (2) A A A B B B c c c (3) A A al A B B A-A:B/100 | A-A:B/100 A-A:B/100 1998-12-02 17/23

Key Op. Display Memory c c AB 12.Key correction (1) A A 0. A 0. E] A 0. E] A 0. A 0. VK 0. A+V/K(M) A+VR - (A+V/A) (M) A+VR or A+/A(M) A+VA_ B B 0. B 0. E] B 0. B 0. E] B 0. E] 1/B 0. 13.Others (1) A A A E] A (2) A A A E] A E] 1/A (3) A A E] A 1998-12-02 18/23

Key Op. Display Memory A El A (4) A A A El A E] -A (5) A A El A El A E] -A (6) A A A B B E] B (7) A A A B B Cc Cc El AC 14.Delta Percentage key function (1) A A A B B (A +B)/B-100 (2) A A E] A B B 9998-12-02 19/23

Key Op. Display Memory A/(1-B/100) JA/(1-B/100) -A| (3) A A kK] A B B A(1+B/100) (4) A A kK] A B B A(1-B/100) Key Chattering Protection (1) At time of key on : about 6.2~9.5ms, after key input (f¢ typ.) (2) At time of key off : about 30.8ms, after completion of the operation (f¢ typ.) (3) Simultaneous keying protection. lf 2 or more keys are pressed simultaneously, any key input is not accepted. TT 998 T2-02—-20723

PARAMETER SYMBOL RATING UNIT Supply Vollage Input Voltage -0.3~Vpp + 0.3 Storage Temperature —55~125 ELECTRICAL CHARACTERISTICS (Vpp = 1.4V t0.2V, Vss = OV, Ta = 25°C) TEST] PIN PARAMETER SYMBOL | CIR- TEST CONDITION TYP. |MAX.| UNIT cuit| NAME Operating Voliage | op |—| = | sd a pa] “eomtve [oe[—foesf [| — fl age Segment Vpb age Segment Vppb _ ‘owen [vor [—[e5) — [| — fo) | ou" Vss Vss ay" Vout =Vpp - 0.5V =| ton |= mes : Output Resistance “0"| Rot | — |Seament| Vour=Vicp+osv | — | — | 70] xa [-o"| Ro. | = [common |Vour=Vico+05v_| — | — | 70] [output Resistance |"m"| Row | — [Common |Vour=Vss+05v | — | — | 10] 0 | Key Pull Down fee” fomamml [oo pours | | we) Key Pull up Resistance | R pull up | — | ®=K3 |Vour=0V [as [30 | 240] KO | ug" . Vout =Vss +0.5V 0” Output Resistance RKEY | - | Segment Key Strobe kQ Input Leakage Current] i | — | Ko |= Vin= Vp P= [= 20] a | Current Consumption _ fam [wo [=| paorereormn [= [va] 9] Current Consumption Vpp =1.1V (OP) 'pp2 [-| -_| (ALL 9-V__Peak) 30 HA Current Consumption on coor [=[ = ome [= =| ol ila fg (wait) Yoo [te tyer=wat | 42| 7 | 98] Oscillating Frequency [fg (OP) [=| = ev ¢ (Typ) =Operate| 10.8 | 18 | 25.2] “H [Frame Frequency | fr |— | —|Vpp=14vwai) |_| 97 | 136] He | [rower off Timer | Timer__| — | — _|Vpp=1.av [300 [420 | 700] 1998-12-02 21/23

Display Device : FEM type LCD 3.0V, 1/2 bias, 1/3 duty dynamic system 11(97H2)*1 Vop : +1.5V Comte 7 Wss_ + 0V mont tnt=33ms"1hr hon ont fom ooo coms <0 He | Hoo H To ono 4 T 1 tom ot tt i wo ot tt y ton ot tout pp Ca~Cg 4 — ss ' f Vico 1/32duty ' i i i i arb 7 ee Yoo YLCD KEY PULSE OUTPUT ——— vo cOM1~COM3 — vss SEGMENT | Feces _ ve (*1) fg =7kHz (2) fg = 18kHz 1998-12-02 22/23

QFP44-P-1010-0.80 Unit : mm 12.2+0.3 33 23

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°+-34-4H Or 22 r on om on om on MI ql o oy ; ; co ho | on hr on oo 4400 or442 4 "1 3540.1 N _ 9 3 ata xs cal ft? 0.78+0.2 Weight : 0.34g (Typ.) 1998-12-02 23/23