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PALCE20V8

EE CMOS 24-Pin Universal Programmable Array Logic

Advanced Micro Devices 

AMD

CAPACITANCE (Note 1)

Parameter

Symbol

Parameter Description

Test Conditions

Typ

Unit

CIN

Input Capacitance

VIN = 2.0 V VCC = 5.0 V, TA = 25°C,

5

pF

COUT

Output Capacitance

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 Parameter Description

-15

Min Max

-25

Min Max

tPD

Input or Feedback to Combinatorial Output

15

25

tS

Setup Time from Input or Feedback to Clock

12

15

tH

Hold Time

0

0

tCO

Clock to Output

10

12

tWL

LOW

Clock Width

tWH

HIGH

8

12

8

12

External Feedback

Maximum

1/(tS + tCO)

45.5

37

fMAX

Frequency Internal Feedback (fCNT) 1/(tS + tCF) (Note 4) 50

40

(Note 3)

No Feedback

1/(tWH + tWL)

62.5

41.6

tPZX

OE to Output Enable

15

20

tPXZ

OE to Output Disable

15

20

tEA

Input to Output Enable Using Product Term Control

15

25

tER

Input to Output Disable Using Product Term Control

15

25

Unit

ns

ns

ns

ns

ns

ns

MHz

MHz

MHz

ns

ns

ns

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. tCF is a calculated value and is not guaranteed. tCF can be found using the following equation:

tCF = 1/fMAX (internal feedback) – tS.

PALCE20V8H-15/25 Q-15/25 (Com’l)

2-173

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