四三态或非R / S锁存器。四三态与非R / S锁存器 Quad 3-STATE NOR R/S Latches . Quad 3-STATE NAND R/S Latches
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