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 5)
Parameter Description
Max
Unit
tPD
Input or Feedback to Combinatorial Output
8 Outputs Switching
1 Output Switching
3
3
7.5
7
ns
ns
tS
tH
Setup Time from Input or Feedback
5
0
1
ns
ns
Hold Time
tCO
Clock to Output
5
1
ns
tSKEWR
tWL
Skew Between Registered Outputs (Note 4)
ns
LOW
4
4
ns
Clock Width
HIGH
tWH
ns
External Feedback
Maximum
1/(tS + tCO
1/(tS + tCF) (Note 6)
1/(tWH + tWL
)
100
125
125
1
MHz
MHz
MHz
ns
Frequency
(Note 3)
fMAX
Internal Feedback (fCNT
)
No Feedback
)
tPZX
tPXA
tEA
OE to Output Enable
OE to Output Disable
6
6
9
9
1
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. Skew testing takes into account pattern and switching direction differences between outputs that have equal loading.
5. Output delay minimums for tPD, tCO, tPZX, tPXZ, tEA, and tER are defined under best case conditions. Future process improvements
may alter these values therefore, minimum values are recommended for simulation purposes only.
6. tCF is a calculated value and is not guaranteed. tCF can be found using the following equation:
tCF = 1/fMAX (internal feedback) – tS.
2-48
PALCE16V8H-7 (Com’l)
AMD [ AMD ]
