资 源 简 介
These octal transceivers are designed specifically for low-voltage (3.3-V) VCC operaTIon, but with the capability to provide a TTL interface to a 5-V system environment.
The ’LVTH543 devices contain two sets of D-type latches for temporary storage of data flowing in either direcTIon. Separate latch-enable (LEAB or LEBA) and output-enable (OEAB or OEBA) inputs are provided for each register, to permit independent control in either direcTIon of data flow.
The A-to-B enable (CEAB) input must be low to enter data from A or to output data from B. If CEAB is low and LEAB is low, the A-to-B latches are transparent; a subsequent low-to-high transiTIon of LEAB puts the A latches in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the data present at the output of the A latches.
