SN74BCT29854 Datasheet, PDF (3/7 Pages) Texas Instruments – 8-BIT TO 9-BIT PARITY BUS TRANSCEIVER

error-flag waveforms
OEB
OEA
Bi + PARITY
SN74BCT29854
8-BIT TO 9-BIT PARITY BUS TRANSCEIVER
SCBS257 – SEPTEMBER 1987 – REVISED NOVEMBER 1993
H
L
H
L
Even
Odd
H
LE
L
H
CLR
L
H
ERR
L
Pass
Store
Clear
Sample
ERROR-FLAG FUNCTION TABLE
INPUTS
LE CLR
L
L
INTERNAL
TO DEVICE
POINT P
L
H
OUTPUT
PRESTATE
ERRn–1†
X
OUTPUT
ERR
L
H
FUNCTION
Pass
L
L
H
X
H
X
L
L
L
Sample
H
H
H
L
X
X
H
Clear
H
H
X
L
H
L
H
Store
† _{ERRn–1 represents the state of the ERR output before any changes at CLR, LE,}
or point P.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^‡
Supply voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage applied to a disabled I/O port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
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