Specifications GAL16V8

1996 Data Book

3-77

Specifications GAL16V8B

AC SWITCHING CHARACTERISTICS

Over Recommended Operating Conditions

A

Input or I/O to

8 outputs switching

3

7.5

3

10

3

15

3

20

3

25

ns

Comb. Output

1 output switching

—

7

—

—

—

—

—

—

—

—

ns

A

Clock to Output Delay

2

5

2

7

2

10

2

11

2

12

ns

—

Clock to Feedback Delay

—

3

—

6

—

8

—

9

—

10

ns

—

Setup Time, Input or Fdbk before Clk

↑

7

—

10

—

12

—

13

—

15

—

ns

—

Hold Time, Input or Fdbk after Clk

↑

0

—

0

—

0—

0—

0

—

ns

A

Maximum Clock Frequency with

83.3

—

58.8

—

45.5

—

41.6

—

37

—

MHz

External Feedback, 1/(tsu + tco)

A

Maximum Clock Frequency with

100

—

62.5

—

50

—

45.4

—

40

—

MHz

Internal Feedback, 1/(tsu + tcf)

A

Maximum Clock Frequency with

100

—

62.5

—

62.5

—

50

—

41.6

—

MHz

No Feedback

—

Clock Pulse Duration, High

5

—

8

—

8

—

10

—

12

—

ns

—

Clock Pulse Duration, Low

5

—

8

—

8

—

10

—

12

—

ns

B

Input or I/O to Output Enabled

3

9

3

10

—

15

—

20

—

25

ns

B

OE to Output Enabled

2

6

2

10

—

15

—

18

—

20

ns

C

Input or I/O to Output Disabled

2

9

2

10

—

15

—

20

—

25

ns

C

OE to Output Disabled

1.5

6

1.5

10

—

15

—

18

—

20

ns

UNITS

1) Refer to Switching Test Conditions section.

2) Calculated from fmax with internal feedback. Refer to fmax Descriptions section.

3) Refer to fmax Descriptions section.

-25

MIN.

MAX.

-20

MIN.

MAX.

-15

MIN.

MAX.

-10

MIN.

MAX.

PARAM.

DESCRIPTION

TEST

-7

MIN.

MAX.

CAPACITANCE (T

SYMBOL

PARAMETER

MAXIMUM*

UNITS

TEST CONDITIONS

C

I

Input Capacitance

8

pF

V

C

I/O

I/O Capacitance

8

pF

V

*Guaranteed but not 100% tested.

COM

COM / IND

COM / IND

IND

COM / IND