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74VHC245 Datasheet(PDF) 2 Page - STMicroelectronics

Part No. 74VHC245
Description  OCTAL BUS TRANSCEIVER 3-STATE
Download  8 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHC245 Datasheet(HTML) 2 Page - STMicroelectronics

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PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCT ION
1
DIR
Directional Control
2, 3, 4, 5,
6, 7, 8, 9
A1 to A8
Data Inputs/Outputs
18, 17, 16,
15, 14, 13,
12, 11
B1 to B8
Data Inputs/Outputs
19
G
Output Enable Input
10
GND
Ground (0V)
20
VCC
Positive Supply Voltage
TRUTH TABLE
INPUT
F UNCTI ON
OUT PUT
GDIR
A BUS
B BUS
L
L
OUTPUT
INPUT
A = B
L
H
INPUT
OUTPUT
B = A
HX
Z
Z
Z
X:”H” or ”L”
Z: High impedance
INPUT EQUIVALENT CIRCUIT
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Val ue
Unit
VCC
Supply Voltage
-0.5 to +7.0
V
VI
DC Input Voltage (DIR, G)
-0.5 to +7.0
V
VI/O
Bus I/O Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
- 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 25
mA
ICC or IGND DC VCC or Ground Current
± 75
mA
Tstg
Storage Temperature
-65 to +150
oC
TL
Lead Temperature (10 sec)
300
oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Valu e
Uni t
VCC
Supply Voltage
2.0 to 5.5
V
VI
Input Voltage (DIR, G)
0 to 5.5
V
VI/O
Bus I/O Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
V
Top
Operating Temperature
-40 to +85
oC
dt/dv
Input Rise and Fall Time (see note 1) (VCC =3.3
± 0.3V)
(V CC =5.0
± 0.5V)
0 to 100
0to 20
ns/V
ns/V
1) VIN from 30% to70%of VCC
74VHC245
2/8


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