www.fairchildsemi.com

6

Extended AC Electrical Characteristics

Note 11: Skew is defined as the absolute value of the difference between the actual propagation delays for any two separate outputs of the same device.

Note 12: This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase

(i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.).

Note 13: This specification is guaranteed but not tested. The limits represent propagation delays with 250 pF load capacitors in place of the 50 pF load

capacitors in the standard AC load. This specification pertains to single output switching only.

Note 14: 3-STATE delays are load dominated and have been excluded from the datasheet.

Note 15: The Output Disable Time is dominated by the RC network (500

Ω, 250 pF) on the output and has been excluded from the datasheet.

Capacitance

Symbol

Parameter

16 Outputs Switching

Units

(Note 12)

(Note 13)

Min

Typ

Max

Min

Max

Propagation Delay

4.1

10.1

6.1

14.5

ns

Clock to Bus

4.2

10.1

6.0

14.8

Propagation Delay

4.0

10.0

5.4

13.7

ns

Bus to Bus

4.7

10.7

5.9

13.5

Propagation Delay

3.8

9.6

5.7

14.2

ns

Select to Bus

4.3

10.9

6.1

15.5

(w/An or Bn HIGH or LOW)

Enable Time

5.0

12.7

(Note 14)

ns

G to An/Bn

4.1

11.3

Disable Time

3.2

8.3

(Note 15)

ns

G to An/Bn

3.5

8.6

Enable Time

4.1

11.3

(Note 14)

ns

DIR to An/Bn

4.4

13.0

Disable Time

2.9

9.5

(Note 15)

ns

DIR to An/Bn

3.4

9.7

Pin-to-Pin Skew

1.0

ns

(Note 11)

Clock to Bus

Pin-to-Pin Skew

1.0

ns

(Note 11)

Clock to Bus

Pin-to-Pin Skew

1.0

ns

(Note 11)

Bus to Bus

Pin-to-Pin Skew

1.0

ns

(Note 11)

Bus to Bus

Pin-to-Pin Skew

(Note 11)

Select to Bus

1.0

ns

(w/An or Bn HIGH or LOW)

Pin-to-Pin Skew

(Note 11)

Select to Bus

1.2

ns

(w/An or Bn HIGH or LOW)

Pin-to-Pin Skew

2.1

ns

(Note 11)

Clock to Bus

Pin-to-Pin Skew

1.0

ns

(Note 11)

Bus to Bus

Pin-to-Pin Skew

2.7

ns

(Note 11)

Select to Bus

Symbol

Parameter

Typ

Units

Conditions

Input Capacitance

4.5

pF

Power Dissipation Capacitance

95

pF