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HD74LV165A - Parallel-Load 8-bit Shift Register

Description

The HD74LV165A is 8-bit serial shift register shifts data from QA to QH when clocked.

Parallel inputs to each stage are enabled by a low level at the Shift/Load input.

Also included is a gated clock input and a complementary output from the eighth bit.

Features

  • VCC = 2.0 V to 5.5 V operation All inputs VIH (Max. ) = 5.5 V (@VCC = 0 V to 5.5 V) All outputs VO (Max. ) = 5.5 V (@VCC = 0 V) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C) Output current ±6 mA (@VCC = 3.0 V to 3.6 V), ±12 mA (@VCC = 4.5 V to 5.5 V) HD74LV165A Function Table Inputs SH/LD L H H H H H H CLK INH X L L H X ↑ ↑ CLK X ↑ ↑ X H L L SER X H L X X H L A H a.

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Full PDF Text Transcription

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HD74LV165A Parallel-Load 8-bit Shift Register ADE-205-267 (Z) 1st Edition March 1999 Description The HD74LV165A is 8-bit serial shift register shifts data from QA to QH when clocked. Parallel inputs to each stage are enabled by a low level at the Shift/Load input. Also included is a gated clock input and a complementary output from the eighth bit. Clocking is accomplished through a 2-input NOR gate permitting one input to be used as a clock inhibit function. Holding either of the clock inputs high inhibits clocking, and high enables the other clock input. Data transfer occurs on the positive going edge of the clock. Parallel loading is inhibited as long as the Shift/Load input is high.
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