MC14549B中文资料逐次求近寄存器数据手册ONSEMI规格书

描述 Description

The MC14549B and MC14559B successive approximation registers are 8 bit registers providing all the digital control and storage necessary for successive approximation analog to digital conversion systems. These parts differ in only one control input. The Master Reset (MR) on the MC14549B is required in the cascaded mode when more than 8 bits are desired. The Feed Forward (FF) of the MC14559B is used for register shortening where End of Conversion (EOC) is required after less than eight cycles. Applications for the MC14549B and MC14559B include analog-to-digital conversion, with serial and parallel outputs.

特性 Features

• Totally Synchronous Operation
• All Outputs Buffered
• Single Supply Operation
• Serial Output
• Retriggerable
• Compatible with a Variety of Digital and Analog Systems such as the MC1408 8-Bit D/A Converter
• All Control Inputs Positive-Edge Triggered
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Capable of Driving 2 Low-Power TTL Loads, 1 Low-Power Schottky TTL Load or 2 HTL Loads Over the Rated Temperature Range
• Chip Complexity: 488 FETs or 122 Equivalent Gates
• Pb-Free Packages are Available

简介

MC14549B属于集成电路（IC）的移位寄存器。由制造生产的MC14549B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。