TCA9535: consumption for IOH

Shunsuke Nagata

Part Number: TCA9535

Hi,

Datasheet show IOH characteristics as below

But blow graph shows different performance

e.g. With Vcc-Voh = 0.4V(3V - 2.6V), Ioh should be about 17mA at 85C. But above characteristics shows 8mA. Which data should be correct?

Regards,
Nagata.

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 320330 points

Both are correct. The graph shows typical characteristics, i.e., what was measured for one typical chip. The table shows the minimum, which is guaranteed for all devices.

0 Kenneth Arnold over 4 years ago

TI__Expert 8030 points

Nagata,

Clemens is correct. If you have any more questions please let us know.

Best,

Kenneth

0 Shunsuke Nagata over 4 years ago in reply to Kenneth Arnold

TI__Genius 13470 points

Could you please let me know the voltage drop when Vcc=1.65V and Ioh = -1mA and -0.1mA?

I would like to know if the output can achieve over 1.4V in this condition.

Regards,
Nagata.

0 Clemens Ladisch over 4 years ago in reply to Shunsuke Nagata

Guru 320330 points

For small currents, the output behaves linearly; see [FAQ] What is the output voltage (VOH or VOL) when the output current is X or the supply voltage is Y?

So at 1.65 V, for −1 mA, the maximum voltage drop is (1.65 V − 1.2 V) / 8 ≈ 0.056 V; for −0.1 mA, 0.006 V.

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TCA9535: consumption for IOH