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SN74LV245A: Input and Output configuration for different voltages pull up resistor need

Part Number: SN74LV245A
Other Parts Discussed in Thread: SN74AUC245

Dear All,

I've gone through  datasheet of IC Page number 12 Figure 5 shows typical application of IC which is 5 to 3.3V compatibility.

In my design My sensor Output is 1.5V to  2.2V so we're planning to have 2V supply. Now for latching 8mA current from IC with input of 1.5V I want my Output to be 2V. 

What I could understand from Recommended Operating Conditions from Page 6 Section 7.3 is High-level output current at 2V is -50uA please guide us whether having pullup resistor over here will work or is there any alternative part available or this.




  • Hi Abhishek,

    The LV family is really optimized for 3.3V to 5V operation.

    If you're wanted to do 1.5V to 2.2V operation, I would recommend going with something more modern like the SN74AUC245 -- it's optimized for 1.8V operation, so you will see much better performance. It supports 8mA operation at 1.8V, with a max supply rating of 2.7V