PALCE20V8 Datasheet, PDF (19/27 Pages) Advanced Micro Devices – EE CMOS 24-Pin Universal Programmable Array Logic

KEY TO SWITCHING WAVEFORMS
WAVEFORM
SWITCHING TEST CIRCUIT
INPUTS
Must be
Steady
May
Change
from H to L
May
Change
from L to H
Don’t Care,
Any Change
Permitted
Does Not
Apply
OUTPUTS
Will be
Steady
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
5V
S₁
R₁
Output
C_L
R₂
Specification
t_PD, t_CO
t_PZX, t_EA
t_PXZ, t_ER
S₁
Closed
Z → H: Open
Z → L: Closed
H → Z: Open
L → Z: Closed
C_L
50 pF
5 pF
Commercial
R₁
R₂
200 Ω
390 Ω
H-5: 200 Ω
16491E-10
Measured Output Value
1.5 V
1.5 V
H → Z: V_OH – 0.5 V
L → Z: V_OL + 0.5 V
PALCE20V8 Family
19