CD4043BDR

CD4043B types are quad crosscoupled 3-state CMOS NOR latches and the CD4044B types are quad cross-coupled 3-state CMOS NAND latches. Each latch has a separate Q output and individual SET and RESET inputs. The Q outputs are controlled by a common ENABLE input. A logic "1" or high on the ENABLE input connects the latch.states to the Q outputs. A logic "0" or low on the ENABLE input disconnects the latch states from the Q outputs, resulting in an open circuit condition on the Q outputs. The open circuit feature allows common busing of the outputs.

Applications

• Hold registers in multi-register systems
• 4-bit independent storage with output enable
• Strobed registers
• General-purpose digital logic
• CD4043B for positive-logic systems
• CD4044B for negative-logic systems

Key features

• 3-state outputs with common output ENABLE
• Separate SET and RESET inputs for each latch
• NOR and NAND configurations
• 5-V, 10-V, and 15-V parametric ratings
• Standardized symmetrical output characteristics
• 100% tested for quiescent current at μ20νν
• Maximum input current of μμ at 78ν over full package temperature range; 100 nA at 18 V and z5℃
• Noise margin (over full package temperature range): 1 V at ΔDD = 5V, 2V at VDD = 10V, 2.5νV at vDD = 15V
• Meets all requirements of JEDEC Tentative Standard No. 1aB, "Standard Specifications for Description of B′ Series CMOS Devices"
• Holding register in multi-register system
• Four bits of independent storage with output ENABLE
• Strobed register
• General digital logic
• CD4643B for positive logic systems
• CD4044B for negative logic systems