# Interpreting the datasheet for a CD4071B OR gate

#### PJB

Joined Oct 24, 2019
31
Hello,

I'm just a hobbyist and not a professional.

I would like to know what the meaning is of
the hyphens or dashes in this datasheet and
also the commas and periods.

TIA

PJB.

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#### WBahn

Joined Mar 31, 2012
30,242
Most people find these rather obvious/intuitive.

A hyphen/dash before a number means that it is negative.

A hyphen/dash that is the only thing in a box means that parameter is not supplied.

A comma separates things. So Vin (V) of "0,20" means either 0 V or 20 V. It's also used to separate a description from the symbol that represents it, such as "Input Low Voltage, V_IL Max."

A period is used either as a decimal point, such that 9.95 means 9 + 95/100, or to indicate an abbreviation, such that "Max." is an abbreviation of "Maximum".

Do you understand what a + sign or a - sign means?

#### MrChips

Joined Oct 2, 2009
30,932
Hyphen before a number means that the value is negative.
Period is the decimal place, for example, -6.8 means negative 6.8
Comma indicates the range of INPUT voltages, for example, 0,5 means LOW input voltage of 0V and HIGH input voltage of 5V.

Dash means that a value for that situation is not applicable or not available.

#### PJB

Joined Oct 24, 2019
31
A comma separates things. So Vin (V) of "0,20" means either 0 V or 20 V. It's also used to separate a description from the symbol that represents it, such as "Input Low Voltage, V_IL Max."
Do you mean only two discrete values, either 0V or 20V, or somewhere inbetween ?

#### eetech00

Joined Jun 8, 2013
4,004
Do you mean only two discrete values, either 0V or 20V, or somewhere inbetween ?
Vin shown as 0,15 represent logic voltage levels of either 0v (logic low), or 15v (logic high)
VDD represents the supply voltage level.

#### ericgibbs

Joined Jan 29, 2010
18,990
Hi PJB,
Couple of datasheets that may be useful.

E

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#### WBahn

Joined Mar 31, 2012
30,242
Do you mean only two discrete values, either 0V or 20V, or somewhere inbetween ?
The test conditions use either of those two values. Nothing in between.