BU9414FV Datasheet, PDF (56/61 Pages) Rohm – 32bit Audio DSP

BU9414FV
Technical Note
●Operational Notes
(1) ABSOLUTE MAXIMUM RATINGS
Permanent device damage may occur and break mode (open or short) can not be specified if power supply, operating
temperature, and those of ABSOLUTE MAXIMUM RATINGS are exceeded. If such a special condition is expected,
components for safety such as fuse must be used.
(2)Regarding of SCLI and SDAI terminals
SCLI and the SDAI terminal do not support 5 V-tolerant. Please use it within absolute maximum rating (4.5V).
(3) Power Supply
Power and Ground line must be designed as low impedance in the PCB. Print patterns if digital power supply and
analog power supply must be separated even if these have same voltage level. Print patterns for ground must be
designed as same as power supply. These considerations avoid analog circuits from the digital circuit noise. All pair of
power supply and ground must have their own de-coupling capacitor. Those capacitor should be checked about their
specification, etc. (nominal electrolytic capacitor degrades its capacity at low temperature) and choose the constant of
an electrolytic capacitor.
(4) Functionality in the strong electro-magnetic field
Malfunction may occur if in the strong electro-magnetic field.
(5) Input terminals
All LSI contain parasitic components. Some are junctions which normally reverse bias. When these junctions forward
bias, currents flows on unwanted path, malfunction or device damage may occur. To prevent this, all input terminal
voltage must be between ground and power supply, or in the range of guaranteed value in the Electrical
characteristics. And no voltage should be supplied to all input terminal when power is not supplied.
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2012.03 - Rev.A