AMD
CAPACITANCE (Note 1)
Parameter
Symbol
Parameter Descriptions
Test Conditions
VIN = 2.0 V
Typ
5
Unit
pF
CIN
Input Capacitance
Output Capacitance
VCC = 5.0 V, TA = 25°C,
COUT
VOUT = 2.0 V
f = 1 MHz
8
pF
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
Min
(Note 4)
Parameter Description
Max
Unit
tPD
tS
Input or Feedback to Combinatorial Output
3
7.5
0
10
ns
Setup Time from Input or Feedback to Clock
Hold Time
ns
ns
tH
tCO
tWL
tWH
Clock to Output
3
7.5
ns
LOW
Clock Width
6
ns
HIGH
6
ns
External Feedback
Maximum
1/(tS + tCO
1/(tS + tCF) (Note 5)
1/(tWH + tWL
)
66.7
71.4
83.3
2
MHz
MHz
MHz
ns
fMAX
Frequency
(Note 3)
Internal Feedback (fCNT
)
No Feedback
)
tPZX
tPXZ
tEA
OE to Output Enable
OE to Output Disable
10
10
10
10
2
ns
Input to Output Enable Using Product Term Control
Input to Output Disable Using Product Term Control
3
ns
tER
3
ns
Notes:
2. See Switching Test Circuit for test conditions.
3. 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.
4. 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.
5. tCF is a calculated value and is not guaranteed. tCF can be found using the following equation:
tCF = 1/fMAX (internal feedback) – tS.
2-52
PALCE16V8Q-10 (Com’l)
AMD [ AMD ]
