S1V3S344A00A600 Epson, S1V3S344A00A600 Datasheet - Page 41

• Manufacturer Part Number: S1V3S344A00A600
• Description: Telecom Voice Conditioning ICs Voice Guidance IC FLASH
• Manufacturer: Epson

Specifications of S1V3S344A00A600

• Application: Voice Guidance
• Supply Voltage (max): 5 V
• Supply Voltage (min): 3.3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 0.2 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.6.5
If erratic IC operations appear to be attributable to noise, consider the following three points.
• NRESET pin
• SCKS pin
• Power supplies
9.6.6
The IC is designed with a fundamental reliability satisfying EIAJ and MIL standards, but the following
precautions must be observed for product mounting.
Since OSCI and OSCO pins are constructed to use the internal transistors directly, the pins are susceptible to
mechanical damage during the board-mounting process. Moreover, the pins may also be susceptible to electraical
damage caused by such disturbances (listed below) whose electrical strength are varying gradually with time and
can exceed the absolute maximum rated voltage (2.5 V) of the IC.
• Electromagnetic induction noise from the utility power supply in the reflow process during board-mounting,
• Electromagnetic induction noise fro the tip of a soldering iron
Especially when using a soldering iron, make sure that the IC GND and soldering iron GND are at the same
potential before soldering.
S1V3S344 Hardware Specification
(Rev. 1.00)
Low-level noise on this pin resets the IC. However, the IC may not always be reset normally, depending on
the input waveform. Due to circuit design, this situation tends to occur when the reset input is in the high state,
with high impedance.
The SCKS pin is a synchronous clock input of a clock synchronous serial interface. If a noise goes into this
pin, depending on the input waveform, it will be recognized as valid data, and will become the cause of
malfunction. When connecting between the host and serial interface (SCKS, SIS, SOS and NSCSS) pins,
these should be connected as short as possible.
If noise lower than the rated voltage enters one of these power-supply lines, the IC may operate erratically.
Take collective measures in board design; for example, by using soild patterns for power supply lines, adding
decoupling capacitors to eliminate noise, or incorporating surge/noise counteracting devices into the power
supply lines.
rework process after board-mounting, or individual characteristics evaluation (experimental confirmation),
and
Noise-Induced Erratic Operations
Others
EPSON
9. Reference Material
37