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MC74VHCT245ADTRG Datenblatt(PDF) 2 Page - ON Semiconductor

Teilenummer MC74VHCT245ADTRG
Bauteilbeschribung  Octal Bus Transceiver
Download  7 Pages
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Hersteller  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC74VHCT245ADTRG Datenblatt(HTML) 2 Page - ON Semiconductor

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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
VCC
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 (High−Z State)
Control Inputs
FUNCTION TABLE
MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage
– 0.5 to + 7.0
V
Vin
DC Input Voltage
– 0.5 to + 7.0
V
VI/O
DC Output Voltage
Outputs in 3−State
High or Low State
– 0.5 to + 7.0
– 0.5 to VCC + 0.5
V
IIK
Input Diode Current
− 20
mA
IOK
Output Diode Current (VOUT < GND; VOUT > VCC)
± 20
mA
Iout
DC Output Current, per Pin
± 25
mA
ICC
DC Supply Current, VCC and GND Pins
± 75
mA
PD
Power Dissipation in Still Air,
SOIC Package†
TSSOP Package†
500
450
mW
Tstg
Storage Temperature
– 65 to + 150
_C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any
of these limits are exceeded, device functionality should not be assumed, damage may occur
and reliability may be affected.
†Derating − SOIC Package: – 7 mW/
_C from 65_ to 125_C
TSSOP Package: − 6.1 mW/
_C from 65_ to 125_C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
VCC
DC Supply Voltage
4.5
5.5
V
Vin
DC Input Voltage
0
5.5
V
VI/O
DC Output Voltage
Outputs in 3−State
High or Low State
0
0
5.5
VCC
V
TA
Operating Temperature
− 40
+ 85
_C
tr, tf
Input Rise and Fall Time
VCC =5.0V ±0.5V
0
20
ns/V
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
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 high−impedance cir-
cuit. For proper operation, Vin and
Vout should be constrained to the
range GND
v (Vin or Vout) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.


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