Philips Semiconductors Product specification
74LVC245A
74LVCH245A
Octal bus transceiver with direction pin with
5-volt tolerant inputs/outputs (3-State)
1998 May 20
3
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
DIR
A0
A1
A2
A3
A4
A5
A6
A7
GND
V
CC
OE
B0
B1
B2
B3
B4
B5
B6
B7
SV00014
PIN DESCRIPTION
PIN NUMBER SYMBOL FUNCTION
1 DIR Direction control
2, 3, 4, 5, 6,
7, 8, 9
A
0
to A
7
Data inputs/outputs
10 GND Ground (0V)
18, 17, 16, 15,
14, 13, 12, 11
B
0
to B
7
Data inputs/outputs
19 OE Output enable input (active-Low)
20 V
CC
Positive supply voltage
FUNCTION TABLE
INPUTS INPUTS/OUTPUTS
OE DIR
An
B
0
L L A = B Inputs
L H lnputs B = A
H X Z Z
H = HIGH voltage level
L = LOW voltage level
X = Don’t care
Z = High impedance OFF-state
LOGIC SYMBOL
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
OE
19
DIR
1
SV00016
LOGIC SYMBOL (IEEE/IEC)
G3
19
3EN1 (BA)
1
3EN2 (AB)
∇ 1
2 ∇
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
SV00208