SN74LVC1G175: Slew rate spec

Terry Wu2

Part Number: SN74LVC1G175

Hello Sirs,

Would you pls help to confirm slew rate spec for 1.8Vdd of sn74lvc1g175 ?

Spec show max rising/falling slew rate is 20ns/V . So we need to slower that this value ex: 100ns/V or need to fast that this value ex: 15n/v ?

Looks like some slew rate unit is deltaV/deltaT .

Many thanks !

over 7 years ago

0 Clemens Ladisch over 7 years ago

Guru 316640 points

The datasheet specifies the maximum limit for the input transition rise or fall rate, so your input signals must have that value or a lower one, i.e. 20 ns/V or something faster, e.g. 15 ns/V.

The specified unit is ns/V, not V/ns.

(Please do not call it "slew rate"; that designation is usually used for the speed at which a chip can actively drive an analog output.)

0 Terry Wu2 over 7 years ago in reply to Clemens Ladisch

Expert 2110 points

Hi Clemens,

Got it. TKS !

Is there slower rising/falling D-FF solutions you could suggest me ? TKS !

0 Clemens Ladisch over 7 years ago in reply to Terry Wu2

Guru 316640 points

How much slowness does your circuit require? The AUP family supports 200 ns/V, but there is no '175 AUP FF.

You can always put a Schmitt-trigger buffer (SN74xxx14) in front of a demanding input pin.

0 Terry Wu2 over 7 years ago in reply to Clemens Ladisch

Expert 2110 points

Hi Clemens,

Many thanks your suggestion !

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SN74LVC1G175: Slew rate spec