HCF4021中文資料8級(jí)靜態(tài)移位寄存器數(shù)據(jù)手冊(cè)ST規(guī)格書

描述 Description

The HCF4021 is a monolithic integrated circuit fabricated in metal oxide semiconductor technology available in PDIP-16 and SO-16 packages.

This device is an 8-stage parallel or serial-input/serial-output register having common clock and parallel/serial control inputs, a single serial data input, and individual parallel \"jam\" inputs to each register stage. Each register stage is a D-type, master-slave flip-flop in addition to an output from stage 8. \"Q\" outputs are also available from stages 6 and 7. Serial entry is synchronous with the clock but parallel entry is asynchronous.

In this device, entry is controlled by the parallel/serial control input. When the parallel/serial control input is low, data are serially shifted into the 8-stage register synchronously with the positive transition of the clock line. When the parallel/serial control input is high, data are jammed into the 8-stage register via the parallel input lines and synchronous with the positive transition of the clock line. The clock input of the internal stage is “forced” when asynchronous parallel entry is made. Register expansion using multiple packages is permitted.

特性 Features

? Medium speed operation: 12 MHz (typ.) clock rate at VDD- VSS= 10 V
? Fully static operation
? 8 master-slave flip-flops plus output buffering and control gating
? Quiescent current specified up to 20 V
? 5 V, 10 V, and 15 V parametric ratings
? Input leakage current II= 100 nA (max.) at VDD= 18 V, TA= 25 °C
? 100% tested for quiescent current
? ESD performance
?CDM: 1 kV
?HBM: 2 kV
?MM: 200 V

簡(jiǎn)介

HCF4021屬于集成電路（IC）的移位寄存器。由ST制造生產(chǎn)的HCF4021移位寄存器移位寄存器是低級(jí)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(hào)形式的數(shù)據(jù)，或在數(shù)字字內(nèi)移動(dòng)數(shù)據(jù)位的位置。移位寄存器通常使用集成到一個(gè)設(shè)備中的一組觸發(fā)器來(lái)實(shí)現(xiàn)，常用于集成度更高的邏輯器件，但仍可用于 I/O 擴(kuò)展等應(yīng)用，在這些應(yīng)用中離散形式的函數(shù)可能會(huì)非常有用。