PAL16L8B Datasheet, PDF (25/33 Pages) Advanced Micro Devices – 20-Pin TTL Programmable Array Logic

AMD
SWITCHING CHARACTERISTICS over COMMERCIAL operating ranges (Note 1)
Parameter
Symbol
tPD
Parameter Description
Input or Feedback to Combinatorial Output
Min
Max Unit
16L8, 16R6,
16R4
35
ns
tS
Setup Time from Input or Feedback to Clock
35
ns
tH
Hold Time
0
ns
tCO
Clock to Output or Feedback
16R8, 16R6,
25
ns
tWL
Clock Width
LOW
16R4
25
ns
tWH
HIGH
25
ns
Maximum
fMAX
Frequency
(Note 2)
External Feedback 1/(tS + tCO)
No Feedback
1/(tWH + tWL)
tPZX
OE to Output Enable
tPXZ
OE to Output Disable
16
MHz
20
MHz
25
ns
25
ns
tEA
Input to Output Enable Using Product Term Control
16L8, 16R6,
35
ns
tER
Input to Output Disable Using Product Term Control
16R4
35
ns
Notes:
1. See Switching Test Circuit for test conditions.
2. These parameters are not 100% tested, but are calculated at initial characterization and at any time the design is modified
where frequency may be affected.
PAL16R8B-4 (Com’l)
2-27