enquiry about ICs

[naveen12]

hi everyone, i m in search of such type of ic which gives high voltage i.e. 5v when no voltage is supplied to it except vcc and gives 0 when high voltage(5v) is supplied to it. I have gone through several inverter ics but they fullfiled only one requirement i.e. those ics gives 0 in response to high voltage but they gives nothing when no voltage is supplied to them & i require high voltage in response to nil voltage. pls if anyone know abt such ic pls help me....

 

[KMoffett]

What IC inverters have you been looking at? Ones with "open collector" or "open drain" outputs need a pull-up resistor between the output and Vcc to get a high output with a low input.

Ken

 

[(*steve*)]

The OP needs a pull down resistor so that with "no voltage" is applied, the input is pulled low.

After that, any non OC or OD output inverter will do the trick.