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CD74HCT242 Datasheet(PDF) 2 Page - Texas Instruments

Part No. CD74HCT242
Description  High Speed CMOS Logic Quad-Bus Transceiver with Three-State Outputs
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD74HCT242 Datasheet(HTML) 2 Page - Texas Instruments

   
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Functional Diagrams
CD74HCT242
CD74HC243, CD74HC243
DIRECTION
SELECT LOGIC
A0
A1
A2
A3
OEB
OEA
3
4
5
6
1
13
11
10
9
8
B0
B1
B2
B3
DIRECTION
SELECT LOGIC
A0
A1
A2
A3
OEB
OEA
3
4
5
6
1
13
11
10
9
8
B0
B1
B2
B3
TRUTH TABLE
CONTROL INPUTS
HCT242 SERIES
HC, HCT243 SERIES
DATA PORT STATUS
DATA PORT STATUS
OEB
OEA
An
Bn
An
Bn
HH
OIOI
L
H
ZZZZ
H
L
ZZZZ
LL
I
OIO
NOTE:
H = High Voltage Level
L = Low Voltage Level
I = Input
O = Output (Same Level as Input)
O = Output (Inversion of Input Level)
Z = High Impedance
To prevent excess currents in the High Z modes all I/O terminals should be terminated with 10k
Ω to 1MΩ resistors.
CD74HCT242, CD74HC243, CD74HCT243


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