SN74LV245A: To complete the pulse signal level conversion using this device, the internal output impedance of this device needs to be known, which is not queried in the manual

ruchan

Part Number: SN74LV245A

At present, it is necessary to use this device to realize the level conversion of 10ns pulse width 30KHz refrequency pulse signal, and the output impedance inside the SN74LV245A device needs to be known.

problem：The output impedance of SN74LV245A after OE is enabled is required.

1 个月前

0 Taylor 1 个月前

TI__Expert 6875 points

Hi ruchan,

We will contact you later.

0 Taylor 1 个月前

TI__Expert 6875 points

Hi ruchan,

With a 4.5 supply, the worst-case output impedance is V_OL / I_OL = 0.55 V / 16 mA ≈ 34 Ω. The typical value is roughly half that.

逻辑

逻辑论坛

SN74LV245A: To complete the pulse signal level conversion using this device, the internal output impedance of this device needs to be known, which is not queried in the manual