Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

what is meant by totempole

Status
Not open for further replies.

alvarorahul

Advanced Member level 4
Joined
Apr 13, 2005
Messages
110
Helped
6
Reputation
12
Reaction score
1
Trophy points
1,298
Activity points
2,062
hi guys

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

flatulent

Advanced Member level 5
Joined
Jul 19, 2002
Messages
4,629
Helped
489
Reputation
980
Reaction score
150
Trophy points
1,343
Location
Middle Earth
Activity points
46,689
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

Full Member level 3
Joined
Oct 10, 2004
Messages
169
Helped
16
Reputation
32
Reaction score
3
Trophy points
1,298
Activity points
2,121
"totempole "is a configulation in TTL circuit.the named comes as one transistor is upon another transistor.
 

@t

Member level 3
Joined
May 14, 2005
Messages
66
Helped
5
Reputation
10
Reaction score
4
Trophy points
1,288
Activity points
1,724
"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

Advanced Member level 3
Joined
Dec 2, 2004
Messages
759
Helped
107
Reputation
222
Reaction score
58
Trophy points
1,308
Activity points
5,006
Then what’s the difference between Push-Pull and totempole??

Thanks
 

coolchip

Full Member level 2
Joined
Nov 17, 2003
Messages
125
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Activity points
1,109
Jack// ani said:
Then what’s the difference between Push-Pull and totempole??

Thanks

active pull-up is called totem-pole.

cmiw
 

barkha

Advanced Member level 4
Joined
Aug 8, 2005
Messages
114
Helped
21
Reputation
42
Reaction score
10
Trophy points
1,298
Location
India
Activity points
2,576
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
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top