SM7153 데이터 시트보기 (PDF) - Samhop Mircroelectronics

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SM7153

ELECTRONIC VOLUME CONTROLLER

Samhop Mircroelectronics 

三合微科股份有限公司

SM7153

SAMHOP Microelectronics Corp. ELECTRONIC VOLUME

CONTROLLER

(5) Backup When Power Off

When the INH terminal is set at ' L ' level, all input/output terminals are shut off and

current consumption is reduced to the minimum. The back up by means of a capacitor

becomes possible in this condition. An application circuit is shown in Figure 8.

+B

VDD

10KΩ

+

-

-Vss

51KΩ

Figure 8

If VDD-Vss drops below 4V, the backup becomes impossible.

(6) Initialisation When Power ON

When VDD-VSS drops below 4V, the auto-initialising function is actuated. The initialising

level is -40dB. If rise of power supply is to

It is recommended to rise supply voltage and the INH terminal as illustrated below.

VDD - VSS OR

INH TERMINAL VOLTAGE

* VDD - VSS = 4.0V

T

T≧1 msec

Figure 9

Page 7

V.1.0

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