M74HC165集成电路（IC）的移位寄存器规格书PDF中文资料

M74HC165属于集成电路（IC）的移位寄存器。由意法半导体集团制造生产的M74HC165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。

描述 Description

The M74HC165 is a high speed CMOS 8-bit PISO (parallel-in-serial-out) shift register fabricated with silicon gate C2MOS technology. This device contains eight clocked master slave RS flip-flops connected as a shift register, with auxiliary gating to provide overriding asynchronous parallel entry. The parallel data enter when the shift/load input is low and can change while shift/load is low, provided that the recommended set-up and hold times are observed. For clocked operation, shift/load must be high. The two clock inputs perform identically: one can be used as a clock inhibit by applying a high signal, to allow this operation clocking is accomplished through a 2-input nor gate. To avoid double clocking, however, the inhibit signal should only go high while the clock is high. Otherwise the rising inhibit signal causes the same response as rising clock edge. All inputs are equipped with protection circuits against static discharge and transient excess voltage.

特性 Features

■ High speed:

– tPD = 15 ns (typ.) at VCC = 6 V

■ Low power dissipation:

– ICC = 4 μA (max.) at TA = 25 °C

■ High noise immunity:

VNIH = VNIL = 28 VCC (Min.)

■ Symmetrical output impedance:

|IOH| = IOL = 4 mA (min)

■ Balanced propagation delays: tPLH ≅ tPHL

■ Wide operating voltage range:

VCC (opr) = 2 V to 6 V

■ Pin and function compatible with 74 series 165