SN74LVC1G11: VOH,VOL

Vidhya J

Part Number: SN74LVC1G11

Tool/software:

HI Team,

For this 2 input AND gate there is no data given for VOH and VOL for VDD=3.3V and VDD=5V??

Similarly for SN74LVC1GU04DBVR (NOT gate), SN74LVC1G11DCKR (3 input AND gate) and SN74LVC1G34DSFR (1bit buffer) what has to be considered for VDD=3.3V and VDD=5V??

Thanks and Regards,

Vidhya

1 month ago

0 Clemens Ladisch 1 month ago

Guru 277650 points

Use the values specified for 3 V and 4.5 V; those are the worst case of 3.3 V ± 0.3 V or 5 V ± 0.5 V supplies.

0 Owen Westfall 1 month ago

TI__Expert 7801 points

Hi Vidhya,

Please see [FAQ] What method is best used for estimating specification values between those given in the datasheet?

-Owen

0 Vidhya J 1 month ago in reply to Clemens Ladisch

Prodigy 240 points

ok. So For 5V, VOH min is 3.8V

for 3.3V, VOH is 2.3V for 24mA IOH

VOH is 2.4V for 16mA IOH.

Limits are not defined for lesser current of 1mA or 2mA.

Please clarify.

0 Vidhya J 1 month ago in reply to Vidhya J

Prodigy 240 points

Also, (+) [FAQ] What is the output voltage (VOH or VOL) when the output current is X or the supply voltage is Y? - Logic forum - Logic - TI E2E support forums

As per this, can consider vcc-0.7=3.3-0.7= 2.6V? or VOH=2.7V for lesser IOH??

0 Clemens Ladisch 1 month ago in reply to Vidhya J

Guru 277650 points

The outputs behave like resistors. The actual V_OL and V_OH depend on the actual input current of your other device.

0 Vidhya J 1 month ago in reply to Clemens Ladisch

Prodigy 240 points

As per datasheet, VOH is 2.4V for 16mA IOH with VDD=3V

How to calculate VOH for <3mA IOH with VDD=3.3V?

0 Clemens Ladisch 1 month ago in reply to Vidhya J

Guru 277650 points

See [FAQ] What is the output voltage (VOH or VOL) when the output current is X or the supply voltage is Y?

3.3 V is the worst case of a 3.3 V ± 0.3 V supply; just use the 3 V values.

For 16 mA, the voltage drop is 3 V − 2.4 V = 0.6 V. At 3 mA, the voltage drop is 0.6 V × 3 mA / 16 mA = 0.1125 V. So V_OH is 3.3 V − 0.1125 V ≈ 3.2 V.