PAL16L8B Datasheet, PDF (21/33 Pages) Advanced Micro Devices – 20-Pin TTL Programmable Array Logic

AMD
CAPACITANCE (Note 1)
Parameter
Symbol
Parameter Description
Test Conditions
Typ Unit
CIN
Input Capacitance
VIN = 2.0 V
VCC = 5.0 V
7
COUT
Output Capacitance
VOUT = 2.0 V
TA = 25°C
f = 1 MHz
pF
7
Note:
1. These parameters are not 100% tested, but are evaluated at initial characterization and at any time the design is modified
where capacitance may be affected.
SWITCHING CHARACTERISTICS over COMMERCIAL operating ranges (Note 2)
Parameter
Symbol Parameter Description
Min
Max Unit
tPD
Input or Feedback to Combinatorial Output
16L8, 16R6,
16R4
25
ns
tS
Setup Time from Input or Feedback to Clock
25
ns
tH
Hold Time
0
ns
tCO
Clock to Output
15
ns
tWL
Clock Width
LOW
tWH
HIGH
Maximum
fMAX
Frequency
(Note 4)
External Feedback
Internal Feedback
(fCNT)
1/(tS + tCO)
1/(tS + tCF)
(Note 5)
No Feedback
1/(tWH + tWL)
tPZX
OE to Output Enable
tPXZ
OE to Output Disable
15
16R8, 16R6,
16R4
15
25
28.5
33
ns
ns
MHz
MHz
MHz
20
ns
20
ns
tEA
Input to Output Enable Using Product Term Control
tER
Input to Output Disable Using Product Term Control
16R8, 16R6,
16R4
25
ns
25
ns
Notes:
2. See Switching Test Circuit for test conditions.
3. Calculated from measured fMAX internal.
4. 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.
5. tCF is a calculated value and is not guaranteed. tCF can be found using the following equation:
tCF = 1/fMAX (internal feedback) – tS.
PAL16R8B-2 (Com’l)
2-23