Analog Resistive Touch Screen Controller
TSC-40/IC product specification
TSC-40/IC Product Specification
1. PRODUCTS OUTLINE
1-1. Scope of Application
This specification applies to the TSC-40/IC.
1-2. Outline
TSC-40/IC is an analog touch screen control IC that performs A/D conversion on analog signal for the
4-wire and 5-wire resistive analog touch screen, and transmits coordination data with 10bit resolution to
the host in a 9600bps serial (asynchronous).
The serial communication enables a connection with PC’s serial port via RS-232C I/F circuit or TTL level.
At the coordinate detection, internal filtering process provides a stabilized coordinate value. By using the
correction function, in addition to the losses that occur in the circuit, display deflection between touch
screen input point that occur in each element and indicator cursor can be corrected to adjust the display
position.
1-3. Features
§
Two coordinate output modes are provided and selected per application: “Coordinate data mode”
where coordinate information is sent with 10bit resolution as it is, and “correction data mode” where
read coordinate is converted to the indicator’s display coordinate and sent.
§
“Correction data mode“ is available after EEPROM is externally attached. It enables to set up to nine
correction points. Coordinate data can be corrected with the base of correction points. Using this
function allows the host driver to make the implementation of correction function unnecessary. In
addition, by placing correction points at the touch screen center and center points of four edges of
touch screen, resistance value deviation of transparent electrode film can be corrected.
§
Two external switch functions are always available in the coordinate (correction) data mode. Two
pieces of external switch information are, at the transmission of coordinate data, included in the
coordinate data as pen-down/pen-up information. Since in the pen-up mode, pen-up data can be
always output to the host, this switch is available as a function switch.
§
§
§
At the touch screen input, buzzer and LED outputs are available. Input confirmation via display and
sound is available.
When no touch screen input is performed, the state moves to “power-save mode“ so that such
application can be supported that requests a low power consumption.
Seven types of coordinate output rates are provided and either can be selected per application among
seven types: six types from 30 to 150p/s plus one type, a point mode that outputs the coordinate only
one time when pen-down is performed.
Document No. DER-S0026A
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
1-4. General specification
Item
Rating
DC 3.3V to 5.5V
Notes
Power supply voltage
Power consumption
29.5mW (standard)
-20 ˚C to +85 ˚C
(No dew condensation)
Operating Temp
-40 ˚C to +125 ˚C
(No dew condensation)
Temperature range at storing
Communication scheme
Asynchronous, serial
Communication rate
Data length
Stop bit
9600bps
8bits
Communication
scheme
Each setting is fixed
Fixed to 6MHz
1bit
Parity
None
Operation frequency
6MHz
(1) Point mode
Point Mode: Only when touch screen is
input, pen-down ID is sent once. After
input ends, no pen-up ID is sent.
(2) 30p/s
(4) 80p/s
(6) 130p/s
(3) 50p/s
(5) 100p/s
(7) 150p/s
Coordinate output rate (point / second)
Linearity error
±3 LSB
Input response time
10ms (TYP)
150p/s, For coordinate data mode.
In the correction data function,
resolution follows the setting value
Coordinate resolution
Dimension (mm)
10bit (1024×1024)
9×9×1.7
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
2. Pin layout and representation
SEL0
RxD
25
26
27
28
29
30
31
32
16
15
14
13
12
11
10
9
SEL4/EEP-CS
SEL3/EEP-CLK
SEL2/EEP-DI
LED1
TSC-40x
TxD
SW1
SW0
BEEP
AN0
xxx
P30
VSS
INDEX
XOUT
####
AN1
XIN
Marking specification
TSC-40x
xxx
Product number x: version number
ROM number
####
Lot number
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
3. Pin functions
Pin
number
Pin name
I/O
Functional description
1
2
AN2
AN3
I/O Touch screen XL/UR input pin.
I/O Touch screen XR/LL input pin.
Transition select pin.
I
3
SEL1
H = Auto transition*1 after reset. L = transition by command.
EEPROM DO input pin; At using no EEPROM, Vcc or GND is connected.
A/D converter reference voltage input pin; Vcc is connected.
Reset input pin (active L).
4
5
EEP-DO
VREF
I
I
RST
6
I
7
CNVSS
VCC
I
Operation mode control pin; Vss is connected.
Power supply input pin; Vcc is connected.
8
I
9
XIN
I
Clock input pin; When using external clock, clock is input to this pin.
Clock output pin; When using external clock, this pin is opened.
Power supply input pin (GND); GND is connected.
Opened*2.
10
11
12
13
XOUT
VSS
O
I
P30
O
O
LED1
LED output pin; ON = Lo, OFF = Hi.
EEPROM DI signal output pin; When using EEPROM, EEPROM DI is connected.
Whether or not EEPROM is used, connect with GND via resistance.
14*3
SEL2/EEP-DI
I/O
EEPROM SK signal output pin; When using EEPROM, EEPROM SK is connected.
15*3
SEL3/EEP-CLK I/O Touch screen mode setting pin. (L=4-wire, H=5-wire)
Whether or not EEPROM is used, connect with Vcc or GND via resistance.
EEPROM setting pin shared with EEPROM CS signal output pin.
EEPROM is set via resistance and Vcc or GND is connected. (L = Used, H = Not
used).
16*3
SEL4/EEP-CS
I/O
When using EEPROM, EEPROM CS is connected.
17
18
19
20
21
22
23
O
O
O
O
O
O
I
Unused pin; Opened.
SYD/LL
SYU/UL
SXL/UR
SXR/LR
THO
Touch screen LL control pin.
Touch screen UL control pin.
Touch screen UR control pin.
Touch screen LR control pin.
Pen down detection pin.
THI
In power-save mode, start signal input pin by pen down.
In power-save mode, start signal input pin by command reception.
Only used serial mode, RxD is connected.
24
25
RxD_I
SEL0
I
I
If power supply voltage is 4.0 to 5.5V, GND is connected. If power supply voltage is
3.3 to 4.0V, Vcc is connected.
26
27
28
29
30
31
32
RxD
TxD
I/O Data receive pin.
I/O Data send pin.
SW1
SW0
BEEP
AN0
I
I
SW1 input pin *4; H = ON = 1, L = OFF = 0.
SW0 input pin *4; H = ON = 1, L = OFF = 0.
BEEP output pin; Hi output; Output frequency =2.5kHz, Output time =50ms.
Touch screen YD/LL input pin.
O
I
AN1
I
Touch screen YU/Sense input pin.
Document No. DER-S0026A
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
*1: Auto transition = Mode changes by a command are not performed. It becomes a “Coordinate Data
Mode (150pps)” immediately after reset.
*2: Always open. If connected with VCC, VSS, or other circuit, an error operation may occur.
*3: About pin number 14, 15 and 16, immediately after a power supply injection, it works as an input
terminal and becomes an output terminal after that. Do not open these terminals.
*4: If neither SW0 nor SW1 function is used, connect 28 and 29 pins to GND directly.
Document No. DER-S0026A
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
4. Initial setting
4-1. EEPROM setting
Depending on that calibration is performed in either TSC-40/IC or host, you can select whether EEPROM
is used or not to store the correction data. EEPROM selection can be set via pin number 16, where
hardware reset release enables the setting.
VCC
(TSC-40/IC)
(EEPROM)
H= Not used
SEL4/EEP-CS
L= Used
CS
4-2. Touch screen mode setting
Touch screen mode setting for 4-wire/5-wire is performed by setting pin number 15 to “H” or “L”. When
power supply is turned on, or hardware reset is released, pin number 15 is read to turn on in either
4-wire/5-wire mode.
Mode
Pin number 15
GND
4-wire touch screen
5-wire touch screen
Vcc
4-3. Power supply voltage setting
Power supply mode setting for 3.3V/5V is performed by setting pin number 25 to “H” or “L”. When power
supply is turned on, or hardware reset is released, pin number 25 is read to turn on in either 3.3V mode/5V
mode.
Power supply voltage
3.3 to 4.0V
Mode
Pin number 25
Vcc
3.3V mode
5V mode
4.0 to 5.5V
GND
*When you operate it with 3.3V mode, the inside frequency of CPU works at 3MHz, and the sampling rate
is 80pps max in calibration data mode.
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
5. Data sheet
5-1. Absolute maximum rating
Rating
Maximum
Item
Symbol
Unit
Description
Minimum
Power supply voltage
Input voltage
VCC
VI
-0.3
-0.3
-0.3
6.5
Vcc+0.3
Vcc+0.3
200
V
V
Output voltage
VO
V
Power consumption
Operation temperature
Storage temperature
PD
mW
˚C
˚C
TOPR
TSTG
-20
-40
+85
+125
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
5-2. Recommended operational conditions
(Vcc=3.3 to 5.5V, Vss=0V, Ta=-20 to 85˚C, unless otherwise noted)
Limits
Item
Symbol
Unit
Description
Minimum
3.3
Standard
Maximum
5.5
VCC
VSS
5.0
0
V
V
V
Power supply voltage
Power supply voltage
Analog reference voltage
VREF
1.8
VCC
VCC
“H” input voltage
(Pin number 1 - 4, 12 - 32)
“H” input voltage
VIH
VIH
0.8VCC
V
0.8VCC
VCC
0.2VCC
0.2VCC
0.16VCC
-80
V
RST, XIN
“L” input voltage
VIL
0
0
0
V
(Pin number 1 - 4, 12 - 32)
“L” input voltage
VIL
V
RST, CNVSS
“L” input voltage
VIL
V
XIN
“H” total peak output current *2
(Pin number 1 - 4, 12 - 32)
“L” total peak output current *2
(Pin number 1 -4, 26 - 32)
“L” total peak output current *2
(Pin number 12 - 25)
ΣIOH (peak)
ΣIOL (peak)
ΣIOL (peak)
ΣIOH (avg)
ΣIOL (avg)
ΣIOL (avg)
IOH (peak)
IOL (peak)
IOH (avg)
mA
mA
mA
mA
mA
mA
mA
mA
mA
80
80
“H” total average output current*2
(Pin number 1 - 4, 12 - 32)
“L” total average output current*2
(Pin number 1 - 4, 26 - 32)
“L” total average output current*2
(pin number 12 - 25)
-40
40
40
“H” peak output current *3
(Pin number 1 - 4, 12 - 32)
“L” peak output current *3
(Pin number 1 - 4, 12 - 32)
“H” average output current *4
(Pin number 1 - 4, 12 - 32)
“L” average output current *4
(Pin number 1 - 4, 12 - 32)
-10
10
-5
IOL (avg)
XIN
5
mA
6.0
MHz
Vibration frequency
*1 Vcc = 4.0 to 5.5V
*2 The total output current is the sum of all the currents flowing through all the applicable ports. The total
average current is an average value measured over 100ms. The total peak current is the peak value of
all the currents.
*3 The peak output current is the peak current flowing in each port.
*4 The average output current IOL(avg), IOH(avg) in an average value measured over 100ms.
*5 When the oscillation frequency has a duty cycle of 50%.
Document No. DER-S0026A
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
5-3. Timing requirement
§
Reset
(Vcc = 3.3 to 5.5V , Vss = 0V , Ta = -20 to 85°C)
Limits
Minimum Maximum
Item
RST L width
Symbol
tw
Unit
Description
2
μs
tw
RST
0.8Vcc
0.8Vcc
0.2Vcc
0.2Vcc
§
External clock timing
Item
Limits
Symbol
Unit
Description
Minimum
Maximum
Input cycle
tC
166
70
ns
ns
Clock frequency: Fixed to 6MHz
Clock pulse width
tWH, tWL
tC
tWH
tWL
0.8VCC
0.2VCC
XIN
§
Clock input circuit
Using ceramic vibrator
CIN
External clock input circuit
XIN
XIN
XOUT
Open
XOUT
COUT
Document No. DER-S0026A
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
5-4. DC standards
(Vcc=3.3 to 5.5V, Vss=0V, Ta=-20 to 85˚C, unless otherwise noted)
Limits
Unit
Item
Symbol
Condition
Minimum
Standard
Maximum
IOH = -5mA
Vcc = 4.0 to 5.5V
IOH = -1.0mA
Vcc = 3.3 to 5.5V
IOL = 5mA
Vcc-1.5
Output “H” voltage *1
VOH
V
V
(Pin number 1-4, 12-32)
Vcc-1.0
1.5
0.3
VCC = 4.0 to 5.5V
IOL = 1.5mA
Output “L” voltage *1
VOL
VOL
VCC = 4.0 to 5.5V
(Pin number1-4, 12-32)
IOL = 1.0mA
1.0
2.0
0.3
VCC = 3.3 to 5.5V
IOL = 15mA
VCC = 4.1 to 5.5V
IOL = 1.5mA
V
V
Output “L” voltage
(Pin number. 12 - 16)
VCC = 4.1 to 5.5V
Hysteresis
(Pin number 12, 15, 17-26, 30)
Hysteresis
VT+ - VT-
0.4
0.5
0.5
V
VT+ - VT-
V
(Pin number 26, 28)
Hysteresis
VT+ - VT-
V
(Pin number 6)
Input “H” current
(Pin number 1-4, 12-32)
Input “H” current
(Pin number 6)
IIH
IIH
IIH
IIL
VI = VCC
VI = VCC
5.0
5.0
μA
μA
μA
μA
μA
μA
uA
Input “H” current
(Pin number 9)
VI = VCC
4.0
Input “L” current
(Pin number 1-4, 12-32)
Input “L” current
(Pin number 6)
VI = VSS
-5.0
-5.0
IIL
VI = VSS
Input “L” current
(Pin number 9)
IIL
VI = VSS
-4.0
0.1
Icc
1.0
Power supply current
STOP mode
Document No. DER-S0026A
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
6. Packaging Specification
6-1. Outline
With a basic packaging unit of 2000, TSC-40/IC is packaged for the number of 2000 and its multiple using
damp-proof aluminum laminate bags (Basic packaging). If the delivery quantity is less than 2000 or not
multiple of 2000, or the product can not be packaged with a unit of 2000, then no damp-proof packaging
specification is applicable (Small group packaging).
If packaged with small group packaging, the products may be dampened. Before packaging, the product
shall take the baking process as specified in [Baking] defined in “TSC-40/IC Storage/Implementation
Specification”.
6-2. Notes on storage/handling
(1) Handle the packages with care and avoid throwing and dropping them. Or, a large impact may be
imposed, causing packaging material’s damage, broken package or bending lead.
(2) Cardboard box may be deteriorated in its strength and deformed due to storage site’s humidity,
stacking condition and storage duration. It is desirable to keep the storage under normal
temperature/humidity (5 to 35 °C, 45 to 75%RH). For warehousing, follow the FIFO principle.
(3) After unpacking, be careful in handling the product to avoid electrostatic breakdown.
6-3. Basic packaging
6-3-1. Packaging type
Damp-proof packaging (Aluminum laminate bag)
6-3-2. Packaging quantity specification
Quantity per tray
250
Number of trays
8 + 1(cover)
Quantity per packages
2000
Desiccant
Tray
Product name label
Aluminum laminate bag
Humidity indicator
Packaging label
Packaging label
Product name
label
Packaging box
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
6-3-3. Diagram for packaging box sizes
L: 330 W: 152 D: 75 (mm)
6-4. Small group packaging
6-4-1. Packaging type
General packaging (No damp-proof processing)
6-4-2. Packaging quantity specification
Quantity per tray
250
Number of trays
1 to 8 +1(cover)
Quantity per packages
1 - 1999
Number of trays: 1 to 8
(Additionally, one dummy tray pl
aced at the top for reinforcing)
Air cap
Desiccant
Product name label
Antistatic bag
* No sizes specified for packaging box (Cardboard
box) used for transportation.
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TSC-40/IC Product Specification
6-5. Tray specification
This tray is heat-proof type, allowing the heating with 125 °C for 24 hours. During heating/cooling process,
however, bending may occur. In baking process, to minimize the bending, heat and cool the tray by placing
it on a flat plate.
6-6. Product name label specification
DMC P/N: Product number (TSC-40/IC)
QTY:
DAC:
Quantity
DMC Control Number
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
7. Storage Specification
7-1. Storage Conditions
For storing the product until its implementation, it is recommended that the following storage conditions are
applied:
1. Before unpacking the damp-proof package (Aluminum laminate bag)
Temperature and humidity:
Duration:
5 to 40 °C, 20 - 80%RH
Two years or less
2. After unpacking the damp-proof package (Aluminum laminate bag)
For the storing duration after the damp-proof package is unpacked and before the implementation, it is
recommended that the following storage conditions is to be applied:
(1) Reflow method:
One week or less under the ambient condition: 30 °C, 70%RH or less
(2) Wave soldering method: One week or less under the ambient condition: 30 °C, 70%RH or less
3. Temporary storage after damp-proof package is unpacked
To store again temporarily the once unpacked and unused damp-proof package, it is recommended to
pack it again into another damp-proof bag with desiccant within a shorter time after opened (Around 10
minutes) as far as possible, and fold the bag’s opening, followed by sealing with adhesive material
such as adhesive tape, then store it under the following conditions:
Temperature, humidity:
Duration:
5 to 40 °C, 20 - 80%RH
One month or less
7-2. Baking
If any condition among those 1 to 3 listed below is applicable, it is recommended to apply the baking as
described below to dry the moisture the package absorbs.
You may place the tray used for damp-proof packaging directly into the thermostatic chamber since the
tray is heat-proof type. When placing into the chamber or after removing from it, to avoid deformation, cool
the tray by placing it on the flat plate such as surface table.
1. Any condition among 1 to 3 in [7-1. Storage condition] is unsatisfied
2. Indicator’s 30% Humidity Check section changes the color to lavender or pink
3. Blue color indicator of desiccant (Silica gel) changes to pink or white
Baking method
Temperature:
Duration:
125 °C
20 to 24 hours
Frequency:
Four times or less (Upper limit: 96 accumulative hours)
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
8. Implementation Temperature Specification
1. Reflow method (Infrared reflow, air reflow)
Frequency:
Three times or less
Temperature:
The following device surface temperature profile is recommended.
260 °C max.
255 °C or above, 10-16s max.
220 °C or above, 60s max.
175±15 °C
1 to 4 °C/s
110±30s
Time
Figure 1: Infrared reflow, air reflow temperature profile
2. Wave soldering method (Flow soldering, solder dip method)
Frequency:
One time or less
Temperature:
Following temperature profile is recommended (Set the optimal preheat temperature
according to the flux type)
10s max. (Primary + Secondary flow
passage duration)
260 °C max.
80 to 150 °C (Package surface temperature)
Time
Figure 2: Wave soldering temperature profile
3. Soldering iron (Manual soldering)
Soldering bit’s temperature:
370 °C or lower
Soldering time:
Five seconds or less/terminal
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TSC-40/IC Product Specification
9. Terminal Pin Specification
Base material
Coat
:Cu
:Sn-1.5%Cu
:5um or above
Thickness of coat
10. Cleaning
In case of cleaning boards with solvents after soldering, following items should be taken attention.
*Administrative guidance and regulation.
*Residual ionic (non ionic) contamination.
*Solvent resistance of parts.
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
11. Changes and improvements
11-1. Version history
§
TSC-40/IC
Ver0.1 (October 3, 2007)
Draft release
Ver0.2 (December 10, 2007)
5-3. Timing requirement
External clock timing
Clerk mistake was corrected.
Input cycle 500ns → 166ns
Clock pulse 200ns → 70ns
6-6. Product name label specification
Ver0.3 (January 21, 2008)
“Pb Free” was added.
Circuit Diagram 5-Wire Resistive Touch Screen
Corrected the 15th-Pin (SEL3/EEP_CLK) to connection with Vcc via resistance.
Ver1.0 (March 13, 2008)
First release
(Change from ver0.3)
1-4. General specification
Input response time was added.
3. Pin functions Detail information was added in 22, 23, 24 pin.
9. Terminal Pin Specification was added.
Document number was added.
Circuit Diagram
Part number was added. (Rev 2)
Ver1.1 (June 30, 2008)
5-2. Recommended operational conditions (TTL input level selected) was deleted.
Ver1.2 (July 2, 2008)
1-4. General specification
Power supply voltage DC 2.4V to 5.5V → DC 3.3V to 5.5V
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
12. Warranty
12-1. Warranty Period
§ The warranty period is limited to 1 year from the date of shipping. The warranty for the initial defection
such as appearance defection is limited to 1 month.
§ Any defected parts under proper use will be examined by the supplier and replaced by the new parts if
the defection is considered to be caused by the supplier.
§ The replacement is subject to be included in the next lot.
12-2. Warranty Target
§ The warranty only covers the product itself and does not cover any damage to others caused by using
this product. Onsite repair or replacement is not supported.
§ We will do our best for delivery problem and product defections, but the warranty for the production line
is not covered.
12-3. Warranty Exceptions
Following conditions are not covered with the warranty and subject to charge.
§ Any malfunctions and damages during transportation and transfer by the user.
§ Any malfunctions and damages caused by a natural disaster or a fire.
§ Any malfunctions and damages caused by static electricity
§ Any malfunctions and damages caused by the failure of the associated equipment.
§ If the product is remodeled, disassembled or repaired by the user.
§ If the product is glued onto the equipment and uninstalled.
§ Any malfunctions and damages caused by an improper usage and handling against the specifications
and notes.
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Version 1.2 ©2008 DMC Co., Ltd.
TSC-40/IC Product Specification
13. Notes on use
13-1. Overall handling
§ When using the product, do not place it close to, or make it contact with, the conductive materials such
as metal.
§ Do not touch the metal part in the product directly with your hands. Or, it may be destructed by the static
electricity. If you contact, or may contact, it directly with your hand, prepare in advance the measure
against static electricity.
§ To store the product, use an appropriate packing box and keep the storage temperature range with no
overload on it.
§ In using the product or storing it, avoid the following conditions:
- Conditions where water is, or may be, attached to the product.
- Conditions where condensation takes place, or may take place.
- In the ambience of organic solvent or acidity or contact, or where the product contacts them.
§ Do not alter or disassemble the product.
13-2. Others
§ This specification may be changed for improvement without prior notices.
§ No liabilities are taken by us for any damage caused by use of this product.
§ This product intends to be used for the standard applications (e.g. office equipment and OA devices,
industrial use, communication devices, household equipment). Avoid its use where failure or malfunction
directly may affect the human body or special applications where extremely high reliability is required
(e.g. airline and space industries, nuclear controls, medical use for life-sustaining).
§ Semi-conductor devices may fail in a certain possibility. Keep the safety design in your mind so that
possible failure in this product shall not cause physical accidents such as injury and death, fire and other
social damages.
TSC-40/IC Product Specification
Version 1.2: Issued at July 2, 2008
©2008 DMC Co., Ltd.
This document is allowed to redistribute but no alteration, part or all, is prohibited.
9F Kanda Sent-Building 1-2-4, Yushima, Bunkyo-ku, Tokyo, 113-0034 Japan
Phone: +81-3-5209-7131 (Japanese), 7135 (English) Fax: +82-3-5209-7130
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Version 1.2 ©2008 DMC Co., Ltd.
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