SLRS021D December 1967 – January 2017 SN55451B , SN55452B , SN55453B , SN55454B , SN75451B , SN75452B , SN75453B , SN75454B
PRODUCTION DATA.
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NOTE
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
Typically the SN75451B device drives a high-voltage or high-current peripheral from an MCU or logic device that cannot tolerate these conditions. The following design is a common application of the SN75451B device, driving an LED using one channel and a high voltage peripheral using the other. In this configuration, the LED will turn on whenever the high voltage peripheral is on.
Each of the inputs to the logic gate should never float. If one of the inputs is floating, then the logic gate could be in an unknown state. Be sure to connect ground or VCC to any unused input channels.