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CD54HCT640 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. CD54HCT640
Description  High-Speed CMOS Logic Octal Three-State Bus Transceiver, Inverting
Download  11 Pages
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD54HCT640 Datasheet(HTML) 2 Page - Texas Instruments

 
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Functional Diagram
OUTPUT ENABLE AND
DIRECTION-SELECT LOGIC
A0
A7
OE
DIR
B0
B7
A1
THRU
A6
B1
THRU
B6
VCC = 20
GND = 10
TRUTH TABLE
CONTROL INPUTS
DATA PORT STATUS
OE
DIR
An
Bn
LL
OI
HH
Z
Z
HL
Z
Z
LH
I
O
To prevent excess currents in the High-Z modes all I/O terminals
should be terminated with 1k
Ω to 1MΩ resistors.
H = High Level
L = Low Level
I = Input
O = Output (Inversion of Input Level)
Z = High Impedance
CD54HC640, CD74HC640, CD54HCT640, CD74HCT640
CD54HC640, CD74HC640, CD54HCT640, CD74HCT640


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