SC9153A データシートの表示（PDF） - Silan Microelectronics

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SC9153A

ELECTRONIC VOLUME CONTROLLER

Silan Microelectronics 

Silan

Semiconductors

5.BACKUP WHEN POWER OFF

On the SC9153A, when the INH terminal is set

at “L” level, all input/output terminal are shut off

and current consumption is reduced to the

minimum. The backup by means of a capacitor

become possible in this condition. An example

of application, when a backup capacitor is

used, is shown right.

If VDD-VSS drops below 4.0V, the backup

becomes impossible.

+B

-VSS

SC9153A

16 VDD

7 INH

1000µF

16V

1 VSS

6.INITIALIZATION WHEN POWER ON

The SC9153A has the auto-initializating built-in

for initialization at time of power ON. As the

initializing system through detection of supply

voltage level is adopted., if rise power supply is

too fast, the initialization may not be fully

effected.(No external initialization is

necessary. )In addition for effective initialization,

it is necessary that the INH terminal is raised

simultaneously with supply voltage. Further, the

initializating level is –40dB.

It is recommended to rise supply voltage and the

INH terminal as illustrated below. If the VDD-VSS

drops below 4.0V, the auto-initializing function is

actuated.

VDD-VSS or INH

Terminal

Voltage

VDD-VSS=4.0V

T>1ms

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

7

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