T6M74A,JT6M74A-AS
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TOSHI BA CMO S Dig ita l Int egrat ed Circ uit Silicon Monolit h ic
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.)
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Pin Assignment (top view)
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System Block Diagram
Battery Type
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Dual Type
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Solar Type
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Connection of LCD
Segment
Common
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Key Connection
K12: Selectable wi th auto power OFF mode an memory hold status.
MH (memory hold), MK (memory kill)
K11: Rounding
K10: 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
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Specification of Calculator
Speed of Calculation
Operation Example
1. Fixed Point Calculations
(1) Key Display Fixed point place (2) Key Display Fixed point place
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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
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(5) Percentage (6) Percentage
Key Display Constant Key Display Constant
(7) Add-on (8) Discount
4. D
DD
D% Calculations
(1) Key Display (2) Key Display
5. Mark-Up, Mark-Down Calculations
(1) Mark-up (2) Mark-down
Key Display Key Display
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6. Add-On, Discount Calculations
Add-on Discount
Key Display Key Display
(1)
(2)
(3)
(4)
(5)
(6)
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Maximum Ratings
Characteristics Symbol Rating Unit
Supply volt age VDD1 -0.3~2.0 V
Input volt age VIN -0.3~VDD1 + 0.3 V
Operating temperature Topr 0~40 °C
Storage temperature Tstg -55~125 °C
Electrical Characteristics (VDD1 =
==
= 1.5 ±
±±
± 0.2 V , VDD2 =
==
= 3.0 ±
±±
± 0.4 V, VSS =
==
= 0 V, Ta =
==
= 25°C)
Characteristics Symbol
Test
Circuit P i n Nam e Test Condition Min Typ. Max Unit
Operating voltage VDD1 ¾ ¾ ¾ 1.2 1.5 2.0 V
“1” input volt age VIH (1) ¾ K2~K9
RESET
¾ VDD1
- 0.4 ¾ VDD1 V
“1” input volt age VIH (2) ¾ K10~K13 ¾
VDD2
- 0.4 ¾ VDD2 V
“0” input volt age VIL ¾ K2~K13
RESET
¾ 0 ¾ 0.4 V
“1” output volt age VOH (1) ¾ SEGMENT
COM1~3
¾ VDD2
- 0.2 ¾ VDD2 V
“0” output volt age VOL (1) ¾ SEGMENT
COM1~3
¾ 0 ¾ 0.2 V
“M” output voltage VOM ¾ COM1~3 ¾
VDD1
- 0.2 ¾ VDD1
+ 0.2 V
“1” output volt age VOH (2) ¾ K1~K9 ¾
VDD1
- 0.2 ¾ VDD1 V
“0” output volt age VOL (2) ¾ K1~K13 ¾ 0 ¾ 0.2 V
“1” output resist ance ROH ¾ SEGMENT
COM1~3 VOUT = VDD2 - 0.5 V ¾ ¾ 70 kW
“0” output resist ance ROL ¾ SEGMENT
COM1~3 VOUT = 0.5 V ¾ ¾ 70 kW
RKEYH (1) ¾ RESET VOUT = VDD1 - 0.5 V ¾ ¾ 25
RKEYH (2) ¾ K0~K9 V
OUT = VDD1 - 0.5 V ¾ ¾ 14
Key pull up resist ance
RKEYH (3) ¾ K10~K13 V
OUT = 0 V 120 ¾ 800
kW
RKEYL (1) ¾ RESET (1) VOUT = VDD1 100 ¾ 300
RKEYL (2) ¾ RESET (2) VOUT = VDD1 18 ¾ 300
RKEYL (3) ¾ K0~K9 (1) VOUT = 0.5 V ¾ ¾ 50
Key pull down resist ance
RKEYL (4) ¾ K0~K9 (2) VOUT = VDD1 72 ¾ 170
kW
Oscillating (WAIT) ffWAIT ¾ ¾ V
DD1 = 1.5 V 5.4 9.0 15.5 kHz
Frequency (OPERATE) ffOP ¾ ¾ VDD1 = 1.5 V 20.0 34 61.3 kHz
Frame frequency fF ¾ SEGMENT
COM1~3 VDD1 = 1.5 V 56.3 93.8 161.5 Hz
1 (WAIT) IDDWAIT ¾ ¾ VDD1 = 1.5 V ¾ ¾ 3.3
2 (OPERATE) IDDOP ¾ ¾ VDD1 = 1.2 V ¾ ¾ 8.9
Supply
current 3 (OFF) IDDOFF ¾ ¾ VDD1 = 1.5 V ¾ ¾ 2.0
mA
Power off timer times T ¾ ¾ V
DD1 = 1.5 V 429 600 1001 s
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Waveforms for Display
Note 2: At ff = 9 kHz
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Pad Location Table (mm)
Name X Point Y Point
COM3 -1757 -1680
COM2 -1757 -1520
COM1 -1757 -1360
K13 -1757 -1200
K12 -1757 -1040
K11 -1757 -880
K10 -1757 -720
K9 -1757 -560
K8 -1757 -400
K7 -1757 -240
K6 -1757 -80
K5 -1757 80
K4 -1757 240
K3 -1757 400
K2 -1757 560
K1 -1757 720
K0 -1757 880
(TS4) -1757 1040
(TS3) -1757 1200
(TS2) -1757 1360
(TS1) -1757 1520
RESET -1757 1680
VG -1388 1753
VDD1 -1151 1753
VDD2 -991 1753
VB -831 1753
VA -671 1753
VSS -511 1753
S4 -351 1753
S3 -191 1753
S2 -31 1753
S1 129 1753
B15 289 1753
A15 449 1753
C14 609 1753
B14 769 1753
A14 929 1753
C13 1089 1753
Name X Point Y Point
B13 1757 1680
A13 1757 1520
C12 1757 1360
B12 1757 1200
A12 1757 1040
C11 1757 880
B11 1757 720
A11 1757 560
C10 1757 400
B10 1757 240
A10 1757 80
C9 1757 -80
B9 1757 -240
A9 1757 -400
C8 1757 -560
B8 1757 -720
A8 1757 -880
C7 1757 -1040
B7 1757 -1200
A7 1757 -1360
C6 1757 -1520
B6 1757 -1680
A6 1278 -1752
C5 1118 -1752
B5 958 -1752
A5 798 -1752
C4 638 -1752
B4 478 -1752
A4 318 -1752
C3 158 -1752
B3 -2 -1752
A3 -162 -1752
C2 -322 -1752
B2 -482 -1752
A2 -642 -1752
C1 -802 -1752
B1 -962 -1752
A1 -1122 -1752
Note3: ( ) Do not connect.
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Chip Layout
Pad Layout
Acti ve Element
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Package Dimensions
Weight: 1.52 g (typ.)
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· 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.
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RESTRICTIONS O N PRODUCT USE
