PAL16L8B Datasheet, PDF (13/33 Pages) Advanced Micro Devices – 20-Pin TTL Programmable Array Logic

AMD
CAPACITANCE (Note 1)
Parameter
Symbol
CIN
COUT
Parameter Description
Input Capacitance ^{CLK, OE}
I1–I8
Output Capacitance
Test Conditions
VIN = 2.0 V
VOUT = 2.0 V
VCC = 5.0 V
TA = 25°C
f = 1 MHz
Typ Unit
8
5
pF
8
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
tPD
tS
tH
tCO
tSKEWR
tWL
tWH
fMAX
tPZX
tPXZ
tEA
tER
Parameter Description
Input or Feedback to Combinatorial Output
Setup Time from Input or Feedback to Clock
Hold Time
Clock to Output
Skew Between Registered Outputs (Note 4)
Clock Width
LOW
HIGH
Maximum
Frequency
(Note 5)
External Feedback
Internal Feedback
(fCNT)
1/(tS + tCO)
1/(tS + tCF)
(Note 6)
No Feedback
OE to Output Enable
1/(tWH + tWL)
OE to Output Disable
Input to Output Enable Using
Product Term Control
Input to Output Disable Using
Product Term Control
-5
16L8, 16R8,
16R4
Min
(Note 3)
1
Max
5
4.5
0
1
4.0
1
16R8, 16R6,
16R4
4
4
117
125
125
1
6.5
1
5
2
6.5
16L8, 16R6,
16R4
2
5
-4
Min
(Note 3)
1
4.5
0
1
4
4
125
125
125
1
1
2
2
Max
4.5
3.5
0.5
6.5
5
6.5
5
Unit
ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
ns
ns
ns
ns
Notes:
2. See Switching Test Circuit for test conditions.
3. Output delay minimums for tPD, tCO, tPZX, tPXZ, tEA, and tER are defined under best case conditions. Future process improve-
ments may alter these values; therefore, minimum values are recommended for simulation purposes only.
4. Skew testing takes into account pattern and switching direction differences between outputs.
5. These parameters are not 100% tested, but are calculated at initial characterization and at any time the design is modified
where the frequency may be affected.
6. tCF is a calculated value and is not guaranteed. tCF can be found using the following equation:
tCF = 1/fMAX (internal feedback) – tS.
PAL16R8-4/5 (Com’l)
2-15