![]() this problem of TTL with totem-pole output is overcome in TTL with open collector output. TTL with totem-pole output has a major problem that the two outputs of the two gates cannot be connected together. Here, the outputs of two NAND gates are connected together. ![]() using a wired-AND connection, the fan-in of the circuit is increased. In terms of 0 and 1, table (a) can be written as in table (b).Ī wired-AND connection has two or more than two gates connected together. The operation of the circuit is summarized in table (a) TTL with active pull-up is known as TTL with totem-pole output. What is ttl circuit with totem-pole output stage minimize gate and advantages disadvantages or ttl with totem pole output ?įigure shows the circuit of a two-input TTL NAND gate with totem-pole output.
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