LA4278

No. 7096-4/6

Notes on Using the IC

• Maximum ratings

When this IC is used near its maximum ratings, it is possible that a slight fluctuation in the operating conditions could

cause the maximum ratings to be exceeded, damaging the IC. Therefore, allow for an adequate safety margin in

regards to supply voltage, etc., so that the IC is never used under conditions that exceed its maximum ratings.

• Short circuit between pins

Applying power to the IC while a short circuit exists between two pins can cause damage or deterioration in the IC.

Therefore, after mounting the IC on a board, make sure that there are no solder bridges, etc., causing a short circuit

between any of the pins before applying power to the IC.

• Using the IC in a radio

When using this IC in a radio, make sure that there is enough distance between the IC and the bar antenna.

• Printed circuit pattern

When designing the printed circuit pattern, keep power, output, and ground lines thick and short, and determine the

placement of the pattern and the components in such a way as to prevent the generation of an I/O feedback loop.

In addition, power supply capacitor C8 and oscillation blocking capacitor C7 and C10 should be placed as close as

possible to the IC pins in order to prevent oscillation.