PAL16L8B Datasheet, PDF (15/33 Pages) Advanced Micro Devices – 20-Pin TTL Programmable Array Logic

AMD
CAPACITANCE (Note 1)
Parameter
Symbol
Parameter Description
Test Conditions
Typ
Unit
CIN
COUT
Input Capacitance
Output Capacitance
VIN = 2.0 V
VOUT = 2.0 V
VCC = 5.0 V
TA = 25°C
f = 1 MHz
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
Parameter Description
Input or Feedback to
Combinatorial Output
1 Output Switching
Min
(Note 3) Max Unit
16L8, 16R6,
3
7.5
16R4
3
7
ns
tS
tH
tCO
tSKEW
tWL
tWH
fMAX
tPZX
tPXZ
tEA
tER
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
7
0
1
16R8, 16R6,
16R4
5
5
74
100
100
1
1
16L8, 16R6,
3
16R4
3
ns
ns
6.5
ns
1
ns
ns
ns
MHz
MHz
MHz
8
ns
8
ns
10
ns
10
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 is measured with all outputs switching in the same direction.
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.
PAL16R8-7 (Com’l)
2-17