74F642 Просмотр технического описания (PDF) - Philips Electronics
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74F642 Datasheet PDF : 10 Pages
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Philips Semiconductors
Transceivers
Product specification
74F641/74F642*
LOGIC DIAGRAM – 74F641
T/R 1
OE 19
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
VCC = Pin 20
GND = Pin 10
18 B0
17 B1
16
B2
15 B3
14 B4
13
B5
12 B6
11 B7
SF01149
FUNCTION TABLE – 74F641
INPUTS
INPUTS/OUTPUTS
OE
T/R
An
Bn
L
L
A=B
INPUTS
H
H
INPUTS
B=A
H
X
OFF
OFF
H = High voltage level
L = Low voltage level
X = Don’t care
OFF= High if pull-up resistor is connected to open collector output
LOGIC DIAGRAM – 74F642
T/R 1
OE 19
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
VCC = Pin 20
GND = Pin 10
18 B0
17 B1
16
B2
15 B3
14 B4
13
B5
12 B6
11 B7
SF01150
FUNCTION TABLE – 74F642
INPUTS
INPUTS/OUTPUTS
OE
T/R
An
Bn
L
L
A=B
INPUTS
H
H
INPUTS
B=A
H
X
OFF
OFF
H = High voltage level
L = Low voltage level
X = Don’t care
OFF= High if pull-up resistor is connected to open collector output
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08
4
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