S1V3S344A00A600 Epson, S1V3S344A00A600 Datasheet - Page 39

• 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 Precautions on Mounting
The following shows the precautions when designing the board and mounting the IC.
9.6.1
Oscillation characteristics change depending on conditions such as components used (oscillator, Rf, Rd, Cg, Cd)
and board pattern. In particular, when a ceramic or crystal oscillator is used, evaluate the components adequately
under real operating conditions by mounting them on the board before the external resistor (Rf, Rd) and capacitor
(Cg, Cd) values are finally decided.
Disurbances of the oscillation clock due to noise may cause a malfunction. To prevent this, the following points
should be taken into consideration.
• Components that are connected to the OSCI and OSCO pins, such as oscillator, resistors and capacitors,
• Whenever possible, configure digital signal lines with at least three millimeters clearance from the OSCI and
• Shield the OSCI and OSCO pins and lines connected to those pins as well as the adjacent layers of the board
S1V3S344 Hardware Specification
(Rev. 1.00)
should be connected in the shortest line.
OSCO and the components and lines connected to these pins. In particular, signals thet are switched
frequently must not be placed near these pins, components, and lines. The same applies to all layers on the
multi-layered board as the distance between the layers is around 0.1 to 0.2 mm. Furthermore, do not configure
digital signal lines in parallel with these components and lines when arranging them on the same or another
layer of the board. Such an arrangement is strictly prohibited, even with clearance of three millimeters or
more. Also, avoid arranging digital signal lines across these components and signal lines.
using VSS. As shown in Figure 9.4, shield the wired layers as much as possible. Whenever possible, make the
whole adjacent layers the ground layers, or ensure there is adequate shielding to a radius of five millimeters
around the above pins and lines. Do not configure digital signal lines in parallel with components and lines
even if such components and lines on other layers.
Oscillation Circuit
Figure 9.4 Example of oscillation circuit VSS pattern
OSCO
OSCI
VSS
EPSON
9. Reference Material
35