# What is VIH VOH VIL Vol?

## What is VIH VOH VIL Vol?

VOL: Nominal voltage corresponding to a low logic state at the output of a logic gate for vI = VOH. VIL: Maximum input voltage that will be recognised as a low input logic level. VIH: Minimum input voltage that will be recognised as a high input logic level.

## What is VIH VOH?

The outputs are often called VOH and VOL (Voltage Out High/Low), and the inputs are called VIH and VIL (Voltage In High and Low). These numbers will appear in a table like this: parameter.

What is VIH voltage?

(VIH is minimum voltage interpreted as logic high/1) Low state/Logic 0: VI < VIL. (VIL is maximum voltage interpreted as logic low/0) “Noise Margin”- allow logic level to be correct despite some voltage variation.

### What is the significance of the voltage range between VIH and VIL between VOH and VOL?

As you might suspect VIH is the minimum Input High voltage of a logic gate, and VIL is the maximum input low voltage. Here is the really important point: Any voltage between VIL and VIH is no mans land. A voltage in that range will result in an unpredictable output.

### How is Vil calculated?

low voltage and input-high voltages are:

1. VIL = 2.5 V – (1/5) (2.5 V) = 2 V. VIH = 2.5 V + (1/5) (2.5 V) =3 V.
2. The low and high noise margins are therefore: NML = VIL – VOL = 2 – 0 = 2 V.
3. NMH = VOH – VIH =5 – 3 = 2 V. The transition region (or “gray area”) is the interval.
4. VIL < VIN < VIH. or 2 V < VIN < 3 V.

What does v O min mean?

VOH => Min voltage at output which allows a 1(high) VOL => Max voltage at output which can be ‘read’ as a 0(low) IIH. => Input current when input = 1. IIL.

## What is the recommended supply voltage level in hd74ls04p?

SPECIFICATIONS

Mfr Package Description 6.30 X 19.20 MM, 2.54 MM PITCH, PLASTIC, DIP-14
Seated Height-Max 5.06 mm
Supply Voltage-Nom (Vsup) 5
Supply Voltage-Min (Vsup) 4.75 V
Supply Voltage-Max (Vsup) 5.25 V

## What is VM in transistor?

– also called midpoint voltage, VM. – here, Vin = Vout = VM. • Calculating VM. – at VM, both nMOS and pMOS in Saturation. – in an inverter, IDn = IDp, always!

How is VM calculated in CMOS?

1. Finding VM. s Goal: find VM = input voltage for the output = VM. both transistors are saturated at VIN = VM since. VDSn = VM – 0 > VM – VTn. VSDp = VDD – VM = (VDD – VM) +VTp.
2. Finding Av. We note that vsg2 = – vin and can simplify the small-signal circuit. + _ g1 = g2.

### What is the voltage for the high logic level in hd74ls86p?

PRODUCT FEATURES
Product Name Digital Logic ICs – AND/NOT/OR/FF/Latch etc
Supply Voltage 4.75 V ~ 5.25 V
Function *
Manufacturer Renesas

### How do you determine logic level?

Logic levels are usually represented by the voltage difference between the signal and ground, although other standards exist. The range of voltage levels that represent each state depends on the logic family being used.

Why are Voh and VIH greater than Vil?

Electrical characteristics of any IC include VOH, VOL, VIH, and VIL. To interface any two ICs, VOH and VIH should be compatible. I am not able to understand why VOH should be greater than VIH and why VOL should be less than VIL. Kindly help me to understand this.

## What is the difference between V O H and V O L?

Ideally, V O H ≫ V I H and V O L ≪ V I L. The differences between the output voltages and the input voltages are called the static noise margin of the interface, and you would like the noise margin to be large so that the circuits would work reliably in the presence of noise.

## What’s the difference between V I H and V I L?

Any input voltage greater than V I H is guaranteed to be recognized as a logic ‘1’, and any input voltage less than V I L is guaranteed to be recognized as a logic ‘0’.