SN74ALS29854

8-BIT TO 9-BIT PARITY BUS TRANSCEIVER

SDAS118C – FEBRUARY 1987 – REVISED JANUARY 1995

3

POST OFFICE BOX 655303

error-flag waveforms

ERR

CLR

LE

Bi + PARITY

OEA

OEB

Even

H

Odd

L

H

L

H

L

H

L

H

L

Pass

Store

Clear

Sample

ERROR-FLAG FUNCTIONS

INPUTS

INTERNAL

TO DEVICE

OUTPUT

PRESTATE

OUTPUT

FUNCTION

LE

CLR

POINT P

ERRn–1†

ERR

L

L

L

H

X

L

H

Pass

L

H

L

X

H

X

L

H

L

L

H

Sample

H

L

X

X

H

Clear

H

H

X

L

H

L

H

Store

† ERRn–1 represents the state of ERR before any changes at CLR, LE, or point P.

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage applied to a disabled I/O port

5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range

– 65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.