參數(shù)資料
型號(hào): MC74VHCT245A
廠商: ON SEMICONDUCTOR
英文描述: Octal Bus Transceiver(八雙向收發(fā)器)
中文描述: 八路總線收發(fā)器(八雙向收發(fā)器)
文件頁(yè)數(shù): 2/7頁(yè)
文件大小: 106K
代理商: MC74VHCT245A
MC74VHCT245A
http://onsemi.com
2
Figure 1. Logic Diagram
A
DATA
PORT
A8
A7
A6
A5
A3
A4
A2
A1
9
8
7
6
5
4
3
2
DIR
OE
1
19
18
17
16
15
14
13
12
11
B1
B2
B3
B4
B5
B6
B7
B8
B
DATA
PORT
Figure 2. Pin Assignment
A5
A3
A2
A1
DIR
GND
A8
A7
A6
A4
5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
11
12
13
B3
B2
B1
OE
V
CC
B8
B7
B6
B5
B4
OE
DIR
Operation
L
L
H
L
H
X
Data Tx from Bus B to Bus A
Data Tx from Bus A to Bus B
Buses Isolated (HighZ State)
Control Inputs
FUNCTION TABLE
applied to the device are individual stress limit values (not normal operating conditions) and are
not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
Derating
SOIC Packages: – 7 mW/ C from 65 to 125 C
TSSOP Package: 6.1 mW/ C from 65 to 125 C
MAXIMUM RATINGS
Symbol
V
CC
V
in
V
I/O
IK
Parameter
DC Supply Voltage
DC Input Voltage
DC Output Voltage
OK
OUT
OUT
CC
Value
Unit
out
– 0.5 to + 7.0
– 0.5 to + 7.0
– 0.5 to + 7.0
CC
V
V
CC
CC
D
Power Dissipation in Still Air,
CC
in
I/O
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this highimpedance cir-
cuit. For proper operation, V
in
and
V
out
should be constrained to the
range GND
(V
in
or V
out
)
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or V
CC
).
Unused outputs must be left open.
V
CC
.
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