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General Description

The CD4043BC are quad cross-couple 3-STATE CMOS NOR latches, and the CD4044BC are quad cross-couple 3-STATE CMOS NAND latches. Each latch has a separate Q output and individual SET and RESET inputs. There is a common 3-STATE ENABLE input for all four latches. A logic “1” on the ENABLE input connects the latch states to the Q outputs. A logic “0” on the ENABLE input disconnects the latch states from the Q outputs resulting in an open circuit condition on the Q output. The 3-STATE feature allows common bussing of the outputs.

Features

■ Wide supply voltage range: 3V to 15V

■ Low power: 100 nW (typ.)

■ High noise immunity: 0.45 VDD (typ.)

■ Separate SET and RESET inputs for each latch

■ NOR and NAND configuration

■ 3-STATE output with common output enable

Applications

? Multiple bus storage

? Strobed register

? Four bits of independent storage with output enable

? General digital logic