74F641 データシートの表示（PDF） - Philips Electronics

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74F641

Transceivers

Philips Electronics 

Philips Semiconductors

Transceivers

Product specification

74F641/74F642*

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

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

FEATURES

• High-impedance NPN base inputs for reduced loading

(20µA in High and Low states)

• Octal bidirectional bus interface

• Common Output Enable for both Transmit and Receive modes

• Open collector outputs sink 64mA

• —74F641, non-inverting

—74F642, inverting

ORDERING INFORMATION

DESCRIPTION

COMMERCIAL RANGE

VCC = 5V ±10%,

Tamb = 0°C to +70°C

20-pin plastic DIP

N74F641N

20-pin plastic SOL

N74F641D

PKG DWG #

SOT146-1

SOT163-1

TYPE

74F641

74F642

TYPICAL

PROPAGATION

DELAY

8.0ns

8.5ns

TYPICAL SUPPLY CURRENT

(TOTAL)

69mA

52mA

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74F(U.L.)

HIGH/LOW

A0 - A7, B0 - B7

Data inputs

1.0/0.033

T/R

Transmit/Receive input

2.0/0.067

OE

Output Enable inputs

2.0/0.067

A0 - A7

Data outputs

OC/40

B0 - B7

Data outputs

OC/106.7

NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state. OC = Open Collector.

LOAD VALUE

HIGH/LOW

20µA/20µA

40µA/40µA

40µA/40µA

OC/24mA

OC/64mA

PIN CONFIGURATION – 74F641

T/R 1

A0 2

A1 3

A2 4

A3 5

A4 6

A5 7

A6 8

A7 9

GND 10

20 VCC

19 OE

18 B0

17 B1

16 B2

15 B3

14 B4

13 B5

12 B6

11 B7

SF00198

PIN CONFIGURATION – 74F642

T/R 1

A0 2

A1 3

A2 4

A3 5

A4 6

A5 7

A6 8

A7 9

GND 10

20 VCC

19 OE

18 B0

17 B1

16 B2

15 B3

14 B4

13 B5

12 B6

11 B7

SF00198

* Discontinued part. Please see the Discontinued Products List.

1999 Jan 08

2

853–0382 20616

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