MC14557集成电路（IC）的移位寄存器规格书PDF中文资料

MC14557属于集成电路（IC）的移位寄存器。由安森美半导体公司制造生产的MC14557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。

1-to-64 Bit Variable Length Shift Register

The MC14557B is a static clocked serial shift register whose length may be programmed to be any number of bits between 1 and 64. The number of bits selected is equal to the sum of the subscripts of the enabled Length Control inputs (L1, L2, L4, L8, L16, and L32) plus one. Serial data may be selected from the A or B data inputs with the A/B select input. This feature is useful for recirculation purposes. A Clock Enable (CE) input is provided to allow gating of the clock or negative edge clocking capability.

The device can be effectively used for variable digital delay lines or simply to implement odd length shift registers.

• 1−64 Bit Programmable Length

• Q and Q Serial Buffered Outputs

• Asynchronous Master Reset

• All Inputs Buffered

• No Limit On Clock Rise and Fall Times

• Supply Voltage Range = 3.0 Vdc to 18 Vdc

• Capable of Driving Two Low−power TTL Loads or one Low−power

Schottky TTL Load Over the Rated Temperature Range

• These Devices are Pb−Free and are RoHS Compliant