CD4021中文資料8-Stage Static Shift Register數(shù)據(jù)手冊O(shè)NSEMI規(guī)格書

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

簡介

CD4021屬于集成電路（IC）的移位寄存器。由ONSEMI制造生產(chǎn)的CD4021移位寄存器移位寄存器是低級邏輯器件，通常用于在串行和并行方式之間轉(zhuǎn)換數(shù)字邏輯信號形式的數(shù)據(jù)，或在數(shù)字字內(nèi)移動數(shù)據(jù)位的位置。移位寄存器通常使用集成到一個設(shè)備中的一組觸發(fā)器來實現(xiàn)，常用于集成度更高的邏輯器件，但仍可用于 I/O 擴展等應(yīng)用，在這些應(yīng)用中離散形式的函數(shù)可能會非常有用。