IN74HC652 データシートの表示（PDF） - Integral Corp.

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IN74HC652

OCTAL 3-STATE BUS TRANSCEIVERS AND D FLIP-FLOPS High-Performance Silicon-Gate CMOS

Integral Corp. 

IN74HC652

FUNCTION TABLE

Dir. OE CAB CBA SAB SBA

A

B

FUNCTION

INPUTS INPUTS Both the A bus and the B bus are

inputs.

L HXXXX

Z

Z

The output functions of the A and B

bus are disabled.

X X INPUTS INPUTS Both the A and B bus are used for

inputs to the internal flip-flops. Data at

the bus will be stored on low to high

transition of the clock inputs.

OUTPUTS INPUTS The A bus are outputs and the B bus

X* X X L

L

are inputs.

L

The data at the B bus are displayed

L

L

X*

H

XL

L

H

at the A bus.

L

The data at the B bus are displayed

H

H

at the A bus. The data of the B bus

are stored to the internal flip-flops on

low to high transition of the clock

X* X X H

Qn

pulse.

X

The data stored to the internal flip-

flops, are displayed at the A bus.

X*

XH

H

H

The data at the B bus are stored to

L

L

the internal flip-flops on low to high

transition of the clock pulse. The

states of the internal flip-flops output

directly to the A bus.

INPUTS OUTPUTS The A bus are inputs and the B bus

X X* L X

L

are outputs.

L

The data at the A bus are displayed

HH

H

X*

L

X

L

H

at the B bus.

L

The data at the B bus are displayed

H

H

at the A bus. The data of the B bus

are stored to the internal flip-flops on

low to high transition of the clock

X X* H X

X

pulse.

Qn The data stored to the internal flip-

X* H X

L

flops are displayed at the B bus.

L

The data at the A bus are stored to

H

H

the internal flip-flops on low to high

transition of the clock pulse. The

states of the internal flip-flops output

directly to the B bus.

OUTPUTS OUTPUTS Both the A bus and the B bus are

outputs

H L XXHH

Qn

Qn The data stored to the internal flip-

flops are displayed at the A and B bus

respectively.

HH

Qn

Qn The output at the A bus are displayed

at the B bus, the output at the B bus

are displayed at the A bus respec.

X : DON’T CARE

Z : HIGH IMPEDANCE

Qn : THE DATA STORED TO THE INTERNAL FLIP-FLOPS BY MOST RECENT LOW TO HIGH

TRANSITION OF THE CLOCK INPUTS

* : THE DATA AT THE A AND B BUS WILL BE STORED TO THE INTERNAL FLIP-FLOPS ON EVERY

LOW TO TRANSITION OF THE CLOCK INPUTS

6

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