型号：SN74HC166N 
品牌：TI
厂家：Texas Instruments
描述： 8-Bit Parallel-Load Shift Registers 16-PDIP -40 to 85 
类别：集成电路 (IC)
家庭：逻辑 - 移位寄存器
系列：74HC
逻辑类型：移位寄存器
输出类型：标准
元件数：1
每个元件的位元数：8
功能：并行或串行至串行
电源电压：2 V ~ 6 V
工作温度：-40°C ~ 85°C
安装类型：通孔
封装/外壳：16-DIP（0.300"，7.62mm）
供应商设备封装：16-PDIP
包装：管件
其它名称：296-8255-5

标准包装：25

SN74HC166N SN74HC166N SN74HC166N

Wide Operating Voltage Range of 2 V to 6 V

Outputs Can Drive Up To 10 LSTTL Loads

Low Power Consumption, 80-μA Max ICC

Typical tpd = 13 ns

±4-mA Output Drive at 5 V

Low Input Current of 1 μA Max

Synchronous Load

Direct Overriding Clear

Parallel-to-Serial Conversion

description/ordering information (continued)

These parallel-in or serial-in, serial-out registers feature gated clock (CLK, CLK INH) inputs and an overriding

clear (CLR) input. The parallel-in or serial-in modes are established by the shift/load (SH/LD) input. When high,

SH/LD enables the serial (SER) data input and couples the eight flip-flops for serial shifting with each clock

(CLK) pulse. When low, the parallel (broadside) data inputs are enabled, and synchronous loading occurs on

the next clock pulse. During parallel loading, serial data flow is inhibited. Clocking is accomplished on the

low-to-high-level edge of CLK through a 2-input positive-NOR gate, permitting one input to be used as a

clock-enable or clock-inhibit function. Holding either CLK or CLK INH high inhibits clocking; holding either low

enables the other clock input. This allows the system clock to be free running, and the register can be stopped

on command with the other clock input. CLK INH should be changed to the high level only when CLK is high.

CLR overrides all other inputs, including CLK, and resets all flip-flops to zero.

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