54ABT646 datasheet(6/14 Pages) NSC

6 / 14 page

DC Electrical Characteristics (Continued)

Note 4: For 8-bit toggling, ICCD < 1.4 mA/MHz.

Note 5: Guaranteed but not tested.

AC Electrical Characteristics

54ABT

A = −55˚C to +125˚C

Fig.

Symbol

Parameter

CC = 4.5V– 5.5V

Units

No.

L = 50 pF

Min

Max

max

Max Clock Frequency

125

MHz

PLH

Propagation Delay

2.2

8.8

Figure 8

PHL

Clock to Bus

1.7

8.8

PLH

Propagation Delay

1.5

7.9

Figure 8

PHL

Bus to Bus

1.5

7.9

PLH

Propagation Delay

1.5

8.1

Figure 8

PHL

SBA or SAB to A

n to Bn

1.5

8.9

PZH

Enable Time

1.0

7.3

Figure 10

PZL

OE to A

n or Bn

1.9

8.8

PHZ

Disable Time

1.5

9.3

Figure 10

PLZ

OE to A

n or Bn

1.5

9.3

PZH

Enable Time

1.0

7.7

Figure 10

PZL

DIR to A

n or Bn

2.2

9.5

PHZ

Disable Time

1.5

8.7

Figure 10

PLZ

DIR to A

n or Bn

1.5

9.2

AC Operating Requirements

54ABT

A = −55˚C to +125˚C

Fig.

Symbol

Parameter

CC = 4.5V– 5.5V

Units

No.

L = 50 pF

Min

Max

S(H)

Setup Time, HIGH

3.5

Figure 11

S(L)

or LOW Bus to Clock

H(H)

Hold Time, HIGH

1.0

Figure 11

H(L)

or LOW Bus to Clock

W(H)

Pulse Width,

4.0

Figure 9

W(L)

HIGH or LOW

Capacitance

Symbol

Parameter

Typ

Units

Conditions

A = 25˚C

Input Capacitance

CC = 0V (non I/O pins)

I/O (Note 6)

Output Capacitance

CC = 5.0V (An,Bn)

Note 6: CI/O is measured at frequency, f = 1 MHz, per MIL-STD-883B, Method 3012.

54ABT646 Datasheet(PDF) 6 Page - National Semiconductor (TI)

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