SN74LS299中文资料通用移位/存储寄存器数据手册TI规格书

描述 Description

These Schottky TTL eight-bit universal registers feature multiplexed inputs/outputs to achieve full eight-bit data handling in a single 20-pin package. Two function-select inputs and two output-control inputs can be used to choose the modes of operation listed in the function table. Synchronous parallel loading is accomplished by taking both function-select lines, S0 and S1, high. This places the three-state outputs in a high-impedance state, which permits data that is applied on the input/output lines to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. A direct overriding input is provided to clear the register whether the outputs are enabled or off.  

特性 Features

• Multiplexed Inputs/Outputs Provide Improved Bit Density
• Four Modes of Operations:
• Hold (Store)
• Shift Left
• Shift Right
• Load Data
• Operates with Outputs Enabled or at High Z
• 3-State Outputs Drive Bus Lines Directly
• Can Be Cascaded for N-Bit Word Lengths
• SN54LS323 and SN74LS323 Are Similar But Have Synchronous Clear
• Applications:
• Stacked or Push-Down Registers Buffer Storage, and Accumulator Registers

简介

SN74LS299属于集成电路（IC）的移位寄存器。由TI制造生产的SN74LS299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。