SN74F299DW集成电路（IC）的移位寄存器规格书PDF中文资料

SN74F299DW属于集成电路（IC）的移位寄存器。由德州仪器制造生产的SN74F299DW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。

Four Modes of Operation:

− Hold (Store)

− Shift Right

− Shift Left

− Load Data

Operates With Outputs Enabled or at High

Impedance

3-State Outputs Drive Bus Lines Directly

Can Be Cascaded for N-Bit Word Lengths

Direct Overriding Clear

Applications:

− Stacked or Pushdown Registers

− Buffer Storage

− Accumulator Registers

description/ordering information

These 8-bit universal shift/storage registers

feature multiplexed I/O ports to achieve full 8-bit

data handling in a single 20-pin package. Two

function-select (S0, S1) inputs and two

output-enable (OE1, OE2) inputs can be used to

choose the modes of operation listed in the

function table.

Synchronous parallel loading is accomplished by

taking both S0 and S1 high. This places the

3-state outputs in a high-impedance state and

permits data that is applied on the I/O ports to

be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in

any mode. Clearing occurs when the clear (CLR) input is low. Taking either OE1 or OE2 high disables the outputs

but has no effect on clearing, shifting, or storage of data.