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t6m74a,JT6M74A-AS 2003-02-28 1 toshiba cmos digital integrated circuit silicon monolithic t6m74a,JT6M74A-AS t6m74a, JT6M74A-AS cmos single-chip lsi for lcd calculator the t6m74a, JT6M74A-AS is a cmos single-chip microcomputer for 16-digit 1-memory calculator. t6m74a, JT6M74A-AS is the complete single-chip cmos lsi for calculator with single power supply operation. wide operating voltage range and low-power consumption make it suitable for 1.5 v solar battery operated. besides t6m74a, JT6M74A-AS can selectable with a pin-programmable to function of power timer and memory hold. with the following features. features display: 16 digits of data, 1 digit of sign, error symbol, memory load symbol. algebraic mode. standard 4 functions (+, ? , , ) automatic percentage operation with add-on, discount. automatic delta percentage, mark-up and mark-down operations. square root. constant calculation. chain calculation. change sign. floating point or momentary mode (selectable with a switch). fixed point (?0?, ?1?, ?2?, ?3?, ?4? or ?6? places) or floating point (selectable with a switch). adding point mode (selectable with a switch). rounding switches (rounding up, down and off). leading zero suppression. trailing zero suppression. punctuation on display, commas for thousands. memory contents indicator, turned on with non-zero in the memory. registration overflow, indicating that too many digits are entered (the most significant digit are protected). result overflow, indicating during calculation (most function key are locked as it happened). memory overflow indicating to flashing of memory load mark. key roll over function. floating minus. weight: 1.52 g (typ.)
t6m74a,JT6M74A-AS 2003-02-28 2 pin assignment (top view)
t6m74a,JT6M74A-AS 2003-02-28 3 system block diagram battery type
t6m74a,JT6M74A-AS 2003-02-28 4 dual type
t6m74a,JT6M74A-AS 2003-02-28 5 solar type
t6m74a,JT6M74A-AS 2003-02-28 6 connection of lcd segment common
t6m74a,JT6M74A-AS 2003-02-28 7 key connection k 12 : selectable with auto power off mode an memory hold status. mh (memory hold), mk (memory kill) k 11 : rounding k 10 : selectable with fixed point or floating mode. note 1: k12 line is no choose then keep condition. k12 line is no choose at the system power on then initial condition is a, mh mode selected. touch key lock key
t6m74a,JT6M74A-AS 2003-02-28 8 specification of calculator speed of calculation operation example 1. fixed point calculations (1) key display fixed point place (2) key display fixed point place
t6m74a,JT6M74A-AS 2003-02-28 9 2. adding point mode calculations key display key display key display 3. constant calculations (1) multiplication (2) division key display constant key display constant (3) addition (4) subtraction
t6m74a,JT6M74A-AS 2003-02-28 10 (5) percentage (6) percentage key display constant key display constant (7) add-on (8) discount 4. % calculations (1) key display (2) key display 5. mark-up, mark-down calculations (1) mark-up (2) mark-down key display key display
t6m74a,JT6M74A-AS 2003-02-28 11 6. add-on, discount calculations add-on discount key display key display (1) (2) (3) (4) (5) (6)
t6m74a,JT6M74A-AS 2003-02-28 12 maximum ratings characteristics symbol rating unit supply voltage v dd1 0.3~2.0 v input voltage v in 0.3~v dd1 0.3 v operating temperature t opr 0~40 c storage temperature t stg 55~125 c electrical characteristics (v dd1 1.5 0.2 v, v dd2 3.0 0.4 v, v ss 0 v, ta 25c) characteristics symbol test circuit pin name test condition min typ. max unit operating voltage v dd1 1.2 1.5 2.0 v ?1? input voltage v ih (1) k 2 ~k 9 reset v dd1 0.4 v dd1 v ?1? input voltage v ih (2) k 10 ~k 13 v dd2 0.4 v dd2 v ?0? input voltage v il k 2 ~k 13 reset 0 0.4 v ?1? output voltage v oh (1) segment com1~3 v dd2 0.2 v dd2 v ?0? output voltage v ol (1) segment com1~3 0 0.2 v ?m? output voltage v om com1~3 v dd1 0.2 v dd1 0.2 v ?1? output voltage v oh (2) k 1 ~k 9 v dd1 0.2 v dd1 v ?0? output voltage v ol (2) k 1 ~k 13 0 0.2 v ?1? output resistance r oh segment com1~3 v out v dd2 0.5 v 70 k ?0? output resistance r ol segment com1~3 v out 0.5 v 70 k r keyh (1) reset v out v dd1 0.5 v 25 r keyh (2) k 0 ~k 9 v out v dd1 0.5 v 14 key pull up resistance r keyh (3) k 10 ~k 13 v out 0 v 120 800 k r keyl (1) reset (1) v out v dd1 100 300 r keyl (2) reset (2) v out v dd1 18 300 r keyl (3) k 0 ~k 9 (1) v out 0.5 v 50 key pull down resistance r keyl (4) k 0 ~k 9 (2) v out v dd1 72 170 k oscillating (wait) f wait v dd1 1.5 v 5.4 9.0 15.5 khz frequency (operate) f op v dd1 1.5 v 20.0 34 61.3 khz frame frequency f f segment com1~3 v dd1 1.5 v 56.3 93.8 161.5 hz 1 (wait) i ddwait v dd1 1.5 v 3.3 2 (operate) i ddop v dd1 1.2 v 8.9 supply current 3 (off) i ddoff v dd1 1.5 v 2.0 a power off timer times t v dd1 1.5 v 429 600 1001 s
t6m74a,JT6M74A-AS 2003-02-28 13 waveforms for display note 2: at f 9 khz
t6m74a,JT6M74A-AS 2003-02-28 14 pad location table ( m) name x point y point com3 1757 1680 com2 1757 1520 com1 1757 1360 k 13 1757 1200 k 12 1757 1040 k 11 1757 880 k 10 1757 720 k 9 1757 560 k 8 1757 400 k 7 1757 240 k 6 1757 80 k 5 1757 80 k 4 1757 240 k 3 1757 400 k 2 1757 560 k 1 1757 720 k 0 1757 880 (ts4) 1757 1040 (ts3) 1757 1200 (ts2) 1757 1360 (ts1) 1757 1520 reset 1757 1680 v g 1388 1753 v dd1 1151 1753 v dd2 991 1753 v b 831 1753 v a 671 1753 v ss 511 1753 s 4 351 1753 s 3 191 1753 s 2 31 1753 s 1 129 1753 b 15 289 1753 a 15 449 1753 c 14 609 1753 b 14 769 1753 a 14 929 1753 c 13 1089 1753 name x point y point b 13 1757 1680 a 13 1757 1520 c 12 1757 1360 b 12 1757 1200 a 12 1757 1040 c 11 1757 880 b 11 1757 720 a 11 1757 560 c 10 1757 400 b 10 1757 240 a 10 1757 80 c 9 1757 80 b 9 1757 240 a 9 1757 400 c 8 1757 560 b 8 1757 720 a 8 1757 880 c 7 1757 1040 b 7 1757 1200 a 7 1757 1360 c 6 1757 1520 b 6 1757 1680 a 6 1278 1752 c 5 1118 1752 b 5 958 1752 a 5 798 1752 c 4 638 1752 b 4 478 1752 a 4 318 1752 c 3 158 1752 b 3 2 1752 a 3 162 1752 c 2 322 1752 b 2 482 1752 a 2 642 1752 c 1 802 1752 b 1 962 1752 a 1 1122 1752 note3: ( ) do not connect.
t6m74a,JT6M74A-AS 2003-02-28 15 chip layout pad layout active element
t6m74a,JT6M74A-AS 2003-02-28 16 package dimensions weight: 1.52 g (typ.)
t6m74a,JT6M74A-AS 2003-02-28 17 toshiba is continually working to improve the quality and reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the responsibility of the buyer, when utilizing toshiba products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products 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 toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. unintended usage of toshiba products listed in this document shall be made at the customer?s own risk. the products described in this document are subject to the foreign exchange and foreign trade laws. the information contained herein is presented only as a guide for the applications of our products. no responsibility 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. the information contained herein is subject to change without notice. 000707eb a restrictions on product use

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