74ACT16374SSCX Ver la hoja de datos (PDF) - Fairchild Semiconductor

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74ACT16374SSCX

16-Bit D-Type Flip-Flop with 3-STATE Outputs

Fairchild Semiconductor 

Functional Description

The ACT16374 consists of sixteen edge-triggered flip-flops

with individual D-type inputs and 3-STATE true outputs.

The device is byte controlled with each byte functioning

identically, but independent of the other. The control pins

can be shorted together to obtain full 16-bit operation. Each

byte has a buffered clock and buffered Output Enable com-

mon to all flip-flops within that byte. The description which

follows applies to each byte. Each flip-flop will store the

state of their individual D inputs that meet the setup and

hold time requirements on the LOW-to-HIGH Clock (CPn)

transition. With the Output Enable (OEn) LOW, the con-

tents of the flip-flops are available at the outputs. When

OEn is HIGH, the outputs go to the high impedance state.

Operation of the OEn input does not affect the state of the

flip-flops.

Logic Diagrams

Truth Tables

Inputs

CP1

OE1

L



L

L

L

X

H

Inputs

CP2

OE2

L



L

L

L

X

H

H HIGH Voltage Level

L LOW Voltage Level

X Immaterial

Z HIGH Impedance

LOW-to-HIGH Transition

Byte 1 (0:7)

I0–I7

H

L

X

X

I8–I15

H

L

X

X

Outputs

O0–O7

H

L

(Previous)

Z

Outputs

O8–O15

H

L

(Previous)

Z

Byte 2 (8:15)

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