TXU0202: How to determine VIL, VIH, VOL, and VOH?

ArTzy

Part Number: TXU0202

Tool/software:

Hi Experts,

For the IC with MPN# TXU0202DCUR, with the below requirements:
VCCA is 3.3V
VCCB is 5.0V
OE is pulled up at 3.3V through 4.7K RESISTOR

For the above condition, we want to know:
1. VIL and VIH for A1 Pin
2. VOL and VOH for B1Y Pin
3. VIL and VIH for B2 Pin
4. VOL and VOH for A2Y Pin

Regards,
Archie A.

2 months ago

0 ArTzy 2 months ago

TI__Genius 16510 points

I followed these FAQs:

But still need further clarifications.

Given the requirements above, the chosen supply voltage is closer to 3V and 4.5V, but 5V is mid-way to 5.5V in the table.

For worst-case, is it safe to consider 3V & 5.5V threshold for VIL, and 3V & 4.5V table for VIH:

Therefore,

A1_VIH = 1.92V
A1_VIL = 0.89V

B2_VIH = 3.33V
B2_VIL = 1.51V

Q1: Is this understanding and voltage level correct for input threshold signals?

For output levels,

A2Y_VOH = 2.2V
A2Y_VOL = 0.8V

B1Y_VOH = 3.7V
B1Y_VOL = 0.8V

Do these parameters also correct?

For your guidance. Thank you.

Regards,
Archie A.

+1 Clemens Ladisch 2 months ago

Guru 298800 points

These tables use 3 V and 4.5 V supply voltages as the worst case of supplies with about 10 % tolerances. Just use the 3 V and 4.5 V V_OL values. The V_OH values can be shifted up by 0.3 V or 0.5 V.

For how to interpolate values, see [FAQ] What method is best used for estimating specification values between those given in the datasheet?

Please note that these V_OL and V_OH values are specified for a certain current. When connected to high-impedance CMOS inputs, the V_OL and V_OH values will be GND and V_CC because the actuall current is zero; see [FAQ] What is the output voltage (VOH or VOL) when the output current is X or the supply voltage is Y?

0 ArTzy 2 months ago in reply to Clemens Ladisch

TI__Genius 16510 points

Thanks, Clemens!

Perfect!

Regards,
Archie A.

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TXU0202: How to determine VIL, VIH, VOL, and VOH?