Philips Semiconductors

Product specification

74F641/74F642*

Transceivers

74F641 Octal Bus Transceiver with Common Output Enable, Non-Inverting (Open Collector)

74F642 Octal Bus Transceiver with Common Output Enable, Inverting (Open Collector)

2

1999 Jan 08

853–0382 20616

* Discontinued part. Please see the Discontinued Products List.

FEATURES

(20

µA in High and Low states)

—74F642, inverting

ORDERING INFORMATION

DESCRIPTION

COMMERCIAL RANGE

PKG DWG #

20-pin plastic DIP

N74F641N

SOT146-1

20-pin plastic SOL

N74F641D

SOT163-1

TYPE

TYPICAL

PROPAGATION

DELAY

TYPICAL SUPPLY CURRENT

(TOTAL)

74F641

8.0ns

69mA

74F642

8.5ns

52mA

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74F(U.L.)

HIGH/LOW

LOAD VALUE

HIGH/LOW

A0 - A7, B0 - B7

Data inputs

1.0/0.033

20

µA/20µA

T/R

Transmit/Receive input

2.0/0.067

40

µA/40µA

OE

Output Enable inputs

2.0/0.067

40

µA/40µA

A0 - A7

Data outputs

OC/40

OC/24mA

B0 - B7

Data outputs

OC/106.7

OC/64mA

NOTE: One (1.0) FAST unit load is defined as: 20

µA in the High state and 0.6mA in the Low state. OC = Open Collector.

PIN CONFIGURATION – 74F641

SF00198

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

T/R

A0

A1

A2

A3

A4

A5

A6

A7

GND

OE

B0

B1

B2

B3

B4

B6

B5

B7

PIN CONFIGURATION – 74F642

SF00198

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

T/R

A0

A1

A2

A3

A4

A5

A6

A7

GND

OE

B0

B1

B2

B3

B4

B6

B5

B7