SN74CBTLV3126: FET bus switch Output enable Logic low or High

Sugumar Krishnasamy

Part Number: SN74CBTLV3126
Other Parts Discussed in Thread: SN74CBTLV3125,

Hi,

We are planning to use your FET bus switch SN74CBTLV3126PWR and we have checked the Table 1. Truth Table and it is mentioned High is enable and Low is disable.

Whereas in the overview (Page 08) it is mentioned " The FET multiplexers and demultiplexers are disabled when the output-enable (OE) input is high". These both are contradictory.

Please confirm to enable the switch what is OE pin state? We need to A and B to connected when enabled.

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 317320 points

SN74CBTLV3125: active-low enable
SN74CBTLV3126: active-high enable

The truth table is correct.

0 Parker Dodson over 4 years ago

TI__Guru 52412 points

Hi Sugumar,

Clemens is correct, the 26 is an active high part while the 25 is active low. Thank you for bringing the contradiction to our attention so we may correct it.

Best,

Parker Dodson

Switches & multiplexers

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SN74CBTLV3126: FET bus switch Output enable Logic low or High