TMPR4938 Datasheet, PDF (27/716 Pages) Toshiba Semiconductor – 64-Bit TX System RISC TX49 Family

3 General Safety Precautions and Usage Considerations
• If the 12-month storage period has expired, or if the 30% humidity indicator shown in Figure 1 is pink when
the packing is opened, it may be advisable, depending on the device and packing type, to back the devices at
high temperature to remove any moisture. Please refer to the table below. After the pack has been opened, use
the devices in a 5°C to 30°C. 60% RH environment and within the effective usage period listed on the
moisture-proof package. If the effective usage period has expired, or if the packing has been stored in a high-
humidity environment, bake the devices at high temperature.
Packing
Tray
Tube
Tape
Moisture removal
If the packing bears the “Heatproof” marking or indicates the maximum temperature which it can
withstand, bake at 125°C for 20 hours. (Some devices require a different procedure.)
Transfer devices to trays bearing the “Heatproof” marking or indicating the temperature which
they can withstand, or to aluminum tubes before baking at 125°C for 20 hours.
Deviced packed on tape cannot be baked and must be used within the effective usage period
after unpacking, as specified on the packing.
• When baking devices, protect the devices from static electricity.
• Moisture indicators can detect the approximate humidity level at a standard temperature of 25°C. 6-point
indicators and 3-point indicators are currently in use, but eventually all indicators will be 3-point indicators.
HUMIDITY INDICATOR
60%
50%
40%
30%
HUMIDITY INDICATOR
40
20%
30
10%
READ AT LAVENDER
BETWEEN PINK & BLUE
(a) 6-point indicator
20
READ AT LAVENDER
BETWEEN PINK & BLUE
(b) 3-point indicator
Figure 1 Humidity indicator
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