Philips Semiconductors

Product specification

74F786

4-bit asynchronous bus arbiter

February 14, 1991

7

AC ELECTRICAL CHARACTERISTICS

LIMITS

+85

SYM-

BOL

PARAMETER

TEST

UNIT

CONDITION

MIN

TYP

MAX

MIN

MAX

MIN

MAX

Propagation delay,

A, B, C, D to YOUT

Waveform 1

2.5

2.5

4.5

4.5

7.5

7.5

2.0

2.5

8.5

7.5

2.0

2.5

8.5

7.5

ns

Propagation delay,

BRn to BGn

Waveform 2

5.0

4.5

7.0

6.5

10.0

9.5

4.5

4.0

10.5

10.0

4.5

4.0

10.5

10.0

ns

Propagation delay,

EN to BGn

Waveform 2

3.0

2.5

5.0

4.5

8.0

7.5

2.5

2.5

8.5

8.0

2.5

2.5

8.5

8.0

ns

Propagation delay,

BRa to BGb

Waveform 2

5.0

7.0

10.0

4.5

10.5

4.5

10.5

ns

AC WAVEFORMS

A, B, C, D

YOUT

SF00445

Waveform 1. Propagation delay for AND gate to output

BRn, EN

BGn

SF00446

Waveform 2. Propagation delay for bus request or enable to

bus grant output

BRa

BGa

BRb

BGb

SF00447

Waveform 3. Propagation delay for bus request to bus grant

output

Notes to AC waveforms

2. a and b represents any of the bus requests or grants. BGa

low–to–high transition and the BGb high–to–low transition occur

simultaneously.