74HCT166D register equivalent, 8-bit parallel-in/serial out shift register.
* Wide supply voltage range from 2.0 V to 6.0 V
* CMOS low power dissipation
* High noise immunity
* Latch-up performance exceeds 100 mA per JESD 78 Class.
* Synchronous serial input for easy expansion
* Input levels:
* For 74HC166: CMOS level
* For 74HCT166: .
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