PAL16L8B Datasheet, PDF (27/33 Pages) Advanced Micro Devices – 20-Pin TTL Programmable Array Logic

KEY TO SWITCHING WAVEFORMS
WAVEFORM
INPUTS
Must be
Steady
OUTPUTS
Will be
Steady
May
Change
from H to L
May
Change
from L to H
Don’t Care,
Any Change
Permitted
Does Not
Apply
Will be
Changing
from H to L
Will be
Changing
from L to H
Changing,
State
Unknown
Center
Line is High-
Impedance
“Off” State
KS000010-PAL
SWITCHING TEST CIRCUIT
5V
AMD
S1
R1
Output
Test Point
R2
CL
16492D-18
Specification
tPD, tCO
tPZX, tEA
tPXZ, tER
S1
Closed
Z → H: Open
Z → L: Closed
H → Z: Open
L → Z: Closed
CL
50 pF
5 pF
Commercial
R1
R2
All but B-4:
All but B-4:
200 Ω
390 Ω
B-4:
800 Ω
B-4:
1.56 kΩ
PAL16R8 Family
Measured
Output Value
1.5 V
1.5 V
H → Z: VOH – 0.5 V
L → Z: VOL + 0.5 V
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