74ALVCH16652 データシートの表示（PDF） - Philips Electronics

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74ALVCH16652

16-bit transceiver/register with dual enable; 3-state

Philips Electronics 

Philips Semiconductors

16-bit transceiver/register with dual enable; 3-state

Product specification

74ALVCH16652

FUNCTION TABLE

See note 1.

INPUTS

nOEAB

L

L

X

H

L

L

L

L

H

H

H

nOEBA

H

H

H

H

X

L

L

L

H

H

L

nCPAB

H or L

↑

↑

↑

H or L

↑

X

X

X

H or L

H or L

nCPBA

H or L

↑

H or L

↑

↑

↑

X

H or L

X

X

H or L

nSAB

X

X

X

L

X

X

X

X

L

H

H

nSBA

X

X

X

X

X

L

L

H

X

X

H

DATA I/O

nA0 to nA7 nB0 to nB7

input

input

FUNCTION

isolation store A and B data

input

input

unspecified(2) store A, hold B

output

store A in both registers

unspecified(2) input

output

input

hold A, store B

store B in both registers

output

input

real-time B data to A bus

stored B data to A bus

input

output

real-time A data to B bus

stored A data to B bus

output

output

stored A data to B bus and

stored B data to A bus

Notes

1. H = HIGH voltage level;

L = LOW voltage level;

X = don’t care;

↑ = LOW-to-HIGH.

2. The data output functions may be enabled or disabled by various signals at the nOEAB and nOEBA inputs. Data input

functions are always enabled, i.e., data at the bus inputs will be stored on every LOW-to-HIGH transition on the clock

inputs.

1999 Nov 23

3

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