m5474hct640 STMicroelectronics, m5474hct640 Datasheet - Page 2

• Manufacturer Part Number: m5474hct640
• Description: Octal Transceiver 3-state Hct245 Inverting Hct640 Inverting, Hct643 Inverting/non Inverting
• Manufacturer: STMicroelectronics

M54/M74HCT245/640/643
INPUT AND OUTPUT EQUIVALENT CIRCUIT
IEC LOGIC SYMBOLS
TRUTH TABLE
X: ”H” or ”L”
Z: High impedance
2/11
G
H
L
L
INPUT
HCT245
DIR
H
X
L
OUTPUT
A BUS
INPUT
Z
FUNCTION
OUTPUT
HCT640
B BUS
INPUT
Z
PIN DESCRIPTION
18, 17, 16,
15, 14, 13,
2, 3, 4, 5,
6, 7, 8, 9
PIN No
12, 11
19
10
20
1
HCT245
A = B
B = A
Z
SYMBOL
A1 to A8
B1 to B8
GND
DIR
V
G
CC
OUTPUT
HCT640
A = B
B = A
Directional Control
Data Inputs/Outputs
Data Inputs/Outputs
Output Enabel Input
(Active LOW)
Ground (0V)
Positive Supply Voltage
NAME AND FUNCTION
Z
HCT643
HCT643
A = B
B = A
Z