what is meant by totempole

[alvarorahul]

hi guys

could anyone tell me what exactly is meant by totempole as in totempole output , etc.

 

[flatulent]

There are two or more transistors between the power supply pin and ground. One pulls the output towards the supply and the other pulls the output towards ground (but not at the same time).

This colourful term comes from the red indians of North America carving faces on a tree trunk.

 

[suvendu]

"totempole "is a configulation in TTL circuit.the named comes as one transistor is upon another transistor.

 

[@t]

"Totempole" output also distinguishes itself from other drivers with a passive
high or low. One of the states there is ruled by a resistor (or current source).

Totempole outputs can never be or'ed or and'ed together, while the passive
ones can.

 

[Jack// ani]

Then what’s the difference between Push-Pull and totempole??

Thanks

 

[coolchip]

Then what’s the difference between Push-Pull and totempole??

Thanks

active pull-up is called totem-pole.

cmiw

 

[barkha]

A totem pole consists of two transistors, which are driven complementary.One transistor pulls the output voltage down, the other transistor pulls the output voltage up. Depending on the desired output, only one of the two transistors is conducting.
Two totem pole outputs should never be tied together. If two totem pole outputs are connected, a shortcut occurs if they carry different digital signals (0/1 or 1/0) , it means If one output voltage is high and the other low , the "pullup" transistor of the first gate fights the "pulldown" transistor of the other. This is one of the most frequent causes of burned out chips