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74HCT643 Datasheet(PDF) 3 Page - NXP Semiconductors

Part # 74HCT643
Description  Octal bus transceiver; 3-state; true/inverting
PDF  6 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HCT643 Datasheet(HTML) 3 Page - NXP Semiconductors

  74HCT643 Datasheet HTML 1Page - NXP Semiconductors 74HCT643 Datasheet HTML 2Page - NXP Semiconductors 74HCT643 Datasheet HTML 3Page - NXP Semiconductors 74HCT643 Datasheet HTML 4Page - NXP Semiconductors 74HCT643 Datasheet HTML 5Page - NXP Semiconductors 74HCT643 Datasheet HTML 6Page - NXP Semiconductors  
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December 1990
3
Philips Semiconductors
Product specification
Octal bus transceiver; 3-state;
true/inverting
74HC/HCT643
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
1
DIR
direction control
2, 3, 4, 5, 6, 7, 8, 9
A0 to A7
data inputs/outputs
10
GND
ground (0 V)
18, 17, 16, 15, 14, 13, 12, 11 B0 to B7
data inputs/outputs
19
OE
output enable input (active LOW)
20
VCC
positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
INPUTS
INPUTS/OUTPUTS
OE
DIR
An
Bn
L
L
H
L
H
X
A=B
inputs
Z
inputs
B= A
Z
Fig.4 Functional diagram.



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