TC4055BP, TC4056BP/BF are LC drivers which drive the
field effect type liquid crystal with seven segments
by BCD input.
If DF input-"L", a selected output among segment
outputs of a through g becomes "H" level and if DF
input="H", a selected output becomes "L" level.
Seven segment liquid crystal element can be directly
driven by applying the pulse in-phase with DF input
to the common terminal (back plane) of liquid crystal.
TC4055BP is equipped with DF output for the common.
terminal and TC4056BP/BF is equipped with the latch.
If VEElowers only "L" side of logical signal can be
achieved.