tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 20

• Manufacturer Part Number: tmp1940cyaf
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

3. General Safety Precautions and Usage Considerations
3.1
3.1.1
This section is designed to help you gain a better understanding of semiconductor devices, so as
to ensure the safety, quality and reliability of the devices which you incorporate into your
designs.
When handling individual devices (which are not yet mounted on a printed
circuit board), be sure that the environment is protected against
electrostatic electricity. Operators should wear anti-static clothing, and
containers and other objects which come into direct contact with devices
should be made of anti-static materials and should be grounded to earth via
an 0.5- to 1.0-M protective resistor.
Please follow the precautions described below; this is particularly important for devices which are
marked “Be careful of static.”.
(1) Work environment
From Incoming to Shipping
When humidity in the working environment decreases, the human body and other insulators
can easily become charged with static electricity due to friction. Maintain the recommended
humidity of 40% to 60% in the work environment, while also taking into account the fact that
moisture-proof-packed products may absorb moisture after unpacking.
Be sure that all equipment, jigs and tools in the working area are grounded to earth.
Place a conductive mat over the floor of the work area, or take other appropriate measures, so
that the floor surface is protected against static electricity and is grounded to earth. The
surface resistivity should be 10
Cover the workbench surface also with a conductive mat (with a surface resistivity of 10
10
is to disperse static electricity on the surface (through resistive components) and ground it to
earth. Workbench surfaces must not be constructed of low-resistance metallic materials that
allow rapid static discharge when a charged device touches them directly.
Pay attention to the following points when using automatic equipment in your workplace:
(a) When picking up ICs with a vacuum unit, use a conductive rubber fitting on the end of the
(b) Minimize friction on IC package surfaces. If some rubbing is unavoidable due to the
(c) In sections which come into contact with device lead terminals, use a material which
(d) Ensure that no statically charged bodies (such as work clothes or the human body) touch
10
Electrostatic discharge (ESD)
8
5
pick-up wand to protect against electrostatic charge.
device’s mechanical structure, minimize the friction plane or use material with a small
friction coefficient and low electrical resistance. Also, consider the use of an ionizer.
dissipates static electricity.
the devices.
/sq, for a resistance between surface and ground of 7.5
to 10
8
4
3 General Safety Precautions and Usage Considerations
to 10
8
/sq and the resistance between surface and ground, 7.5
6
10
5
to 10
8
) . The purpose of this
4
to