CD4021中文资料8-Stage Static Shift Register数据手册ONSEMI规格书

描述 Description

General Description
The CD4021BC is an 8-stage parallel input/serial output shift register. A parallel/serial control input enables individ ual JAM inputs to each of 8 stages. Q outputs are available from the sixth, seventh, and eighth stages. All outputs have equal source and sink current capabilities and conform to
standard “B” series output drive. When the parallel/serial control input is in the logical “0”
state, data is serially shifted into the register synchronously with the positive transition of the clock. When the parallel/serial control is in the logical “1” state, data is jammed into each stage of the register asynchronously with the clock.
All inputs are protected against static discharge with diodes to VDDand VSS.

特性 Features

■Wide supply voltage range: 3.0V to 15V
■High noise immunity: 0.45 VDD(typ.)
■Low power TTL compatibility:
    Fan out of 2 driving 74L or 1 driving 74LS
■5V–10V–15V parametric ratings
■Symmetrical output characteristics
■Maximum input leakage 1 µA at 15V over full temperature range

简介

CD4021属于集成电路（IC）的移位寄存器。由ONSEMI制造生产的CD4021移位寄存器移位寄存器是低级逻辑器件，通常用于在串行和并行方式之间转换数字逻辑信号形式的数据，或在数字字内移动数据位的位置。移位寄存器通常使用集成到一个设备中的一组触发器来实现，常用于集成度更高的逻辑器件，但仍可用于 I/O 扩展等应用，在这些应用中离散形式的函数可能会非常有用。