LM193QML-SP: Input Voltage Greater Than Supply Voltage ???

Walter Heinz

Part Number: LM193QML-SP
Other Parts Discussed in Thread: LM339

If a voltage is applied (~8V) at the non-inverting input without any voltage applied to supply terminal Vcc or invertng input, can the device be damaged or suffer any degradation?

over 3 years ago

0 Paul Grohe over 3 years ago

TI__Guru 51686 points

Hello Walter,

As long as the current is limited, usually by any series resistance, then there should be no damage. The inputs can be taken up to +36V, even when Vcc=0V without damage.

See the LM339 family application note, particularly section 2.5:

Application Design Guidelines for LM339, LM393, TL331 Family Comparators

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LM193QML-SP: Input Voltage Greater Than Supply Voltage ???