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The TC40H194 is a 4-bit bidirectional bit

register, which permits right shift (in the direc-

tion from QA to Qp) and left shift (in the direc-

tion from QD to QA) operations.

When CLEAR terminal is set to L level, output

goes to L level regardless of other inputs. All

the other operations synchronize with the rising

edge of CLOCK.

The function and pin assignment of this

register are the same as those of the TTL74194 and

the LSTTL 74LS194.