INTEGRATED CIRCUITS
74AC245/74ACT245
Octal transceiver with direction pin
(3-State)
Product specification
Philips
Semiconductors
1997 Apr 07
Philips Semiconductors
Product specification
74AC245
74ACT245
Octal transceiver with direction pin (3-State)
PIN CONFIGURATION
LOGIC SYMBOL
1
DIR
A0
DIR
1
20
2
19
OE
A1
3
18
B0
A2
4
17
5
16
18
A1
A2
B2
6
15
7
14
B4
A6
8
13
B2
5
B3
A5
B1
4
16
A3
A4
B0
3
17
B1
A3
B5
A7
9
12
15
A4
B3
6
14
A5
B6
11
GND 10
OE
2
VCC
A0
19
B7
B4
7
13
A6
B5
8
12
A7
B6
9
11
B7
SV00014
PIN DESCRIPTION
SV00016
FUNCTION TABLE
PIN NUMBER
SYMBOL
1
DIR
INPUTS
NAME AND FUNCTION
INPUTS/OUTPUTS
A0 – A7
18, 17, 16, 15, 14,
13, 12, 11
B0 – B7
19
OE
10
GND
VCC
Positive supply voltage
Bn
An= Bn
Inputs
H
Inputs
Bn =An
Z
Z
Ground (0V)
20
An
L
L
Data inputs/outputs (A side)
DIR
L
2, 3, 4, 5, 6, 7, 8, 9
OEn
Direction control input
Data inputs/outputs (B side)
H
L
X
Z
Output enable input
(active–Low)
=
=
=
=
H
X
High voltage level
Low voltage level
Don’t care
High impedance “Off” state
LOGIC SYMBOL (IEEE/IEC)
19
G3
3 EN1 (BA)
1
3 EN2 (AB)
2
18
1
2
3
17
4
16
5
15
6
14
7
13
8
12
9
11
SV00183
1997 Apr 07
3