Philips Semiconductors

Product specification

74F1779

8-bit bidirectional binary counter (3-State)

1989 Apr 06

6

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

SYMBOL

PARAMETER

LIMITS

UNIT

SYMBOL

PARAMETER

MIN

MAX

UNIT

TC

2.5

V

High level output voltage

TC

2.7

3.4

V

High-level output voltage

I/On

2.4

V

I/On

2.7

3.3

V

Low level output voltage

0.30

0.50

V

Low-level output voltage

0.35

0.50

V

Input clamp voltage

–0.73

–1.2

V

I

Input current at maximum

I/On

1

mA

input voltage

others

100

µA

High-level input current

except

20

µA

Low-level input current

I/On

–0.6

mA

Off-state output current

High-level voltage applied

I/On

70

µA

Off-state output current

Low-level voltage applied

I/On

–600

µA

–60

–150

mA

100

145

mA

Supply current (total)

100

145

mA

110

155

mA

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting

of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other tests. In any sequence of

AC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL

PARAMETER

TEST

CONDITION

UNIT

MIN

TYP

MAX

MIN

MAX

Maximum clock frequency

Waveform 1

115

130

100

MHz

Propagation delay

CP to I/On

Waveform 1

4.0

5.0

6.5

7.0

10.0

10.5

4.0

5.0

10.5

11.0

ns

Propagation delay

CP to TC

Waveform 1

4.0

4.5

6.5

6.5

9.0

9.0

3.5

4.0

9.5

9.5

ns

Propagation delay

CET to TC

Waveform 2

2.0

2.5

4.0

4.5

6.5

7.0

2.0

2.5

7.5

7.5

ns

Output Enable time to

High or Low level

Waveform 4

Waveform 5

2.0

4.5

4.0

6.5

6.5

9.0

2.0

4.0

7.5

9.5

ns

Output Enable time from

High or Low level

Waveform 4

Waveform 5

1.0

1.0

3.0

4.0

6.0

7.0

1.0

1.0

6.5

7.5

ns