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74HC91 - 8-bit Shift Register

Description

This serial-in, serial-out, 8-bit shift register is composed of eight R-S master-slave flip-flops, input gating, and a clock drive.

Single-rail data and input control are gated through inputs A and B and an internal inverter to form the complementary inputs to the first bit of the shift register.

Features

  • High Speed Operation: tpd (Data Word Input to Output) = 21 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs tn A H L X X : tn : t n + 8: B H X L Irrelevant Reference bit time, clock low Bit time after 8 low-to-high clock transitions Outputs tn + 8 QH H L L QH L H H HD74HC91 P.

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Datasheet Details

Part number 74HC91
Manufacturer Hitachi
File Size 49.79 KB
Description 8-bit Shift Register
Datasheet download datasheet 74HC91 Datasheet
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Full PDF Text Transcription

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HD74HC91 8-bit Shift Register Description This serial-in, serial-out, 8-bit shift register is composed of eight R-S master-slave flip-flops, input gating, and a clock drive. Single-rail data and input control are gated through inputs A and B and an internal inverter to form the complementary inputs to the first bit of the shift register. Drive for the internal common clock line is provided by an inverting clock driver. This clock pulse inverter/driver causes these circuits to shift information one bit on the positive edge of an input clock pulse.
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