74HC/HCT154 Philips Semiconductors (Acquired by NXP), 74HC/HCT154 Datasheet - Page 3

• Manufacturer Part Number: 74HC/HCT154
• Description: 4-to-16 Line Decoder/demultiplexer
• Manufacturer: Philips Semiconductors (Acquired by NXP)

H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
Philips Semiconductors
PIN DESCRIPTION
LOGIC SYMBOL
FUNCTION TABLE
1998 Feb 17
1DIR
PIN NUMBER
2, 3, 5, 6, 8, 9,
13, 14, 16, 17,
36, 35, 33, 32,
47, 46, 44, 43,
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
28, 34, 39, 45
19, 20, 22, 23
30, 29, 27, 26
41, 40, 38, 37
16-bit bus transceiver with direction pin; 30 series
termination resistors; 5V Input/Outputs tolerant (3-State)
4, 10, 15, 21,
7, 18, 31, 42
47
46
44
43
41
40
38
37
11, 12
1
nOE
24
25
48
H
1
L
L
INPUTS
1B0 to 1B7
2B0 to 2B7
2A0 to 2A7
1A0 to 1A7
SYMBOL
1DIR
GND
2DIR
nDIR
2OE
1OE
V
H
CC
L
X
48
12
11
2
3
5
6
8
9
1OE
1B0
1B1
1B2
1B3
1B4
1B5
1B6
1B7
2DIR
Direction control
Data inputs/outputs
Ground (0V)
Positive supply voltage
Data inputs/outputs
Direction control
Output enable input
(active LOW)
Data inputs/outputs
Data inputs/outputs
Output enable input
(active LOW)
2A0
2A1
2A2
2A3
2A4
2A5
2A6
2A7
24
36
35
33
32
30
29
27
26
NAME AND FUNCTION
inputs
A = B
nAn
Z
INPUTS/OUTPUT
inputs
B = A
nBn
SW00197
Z
23
25
13
14
16
17
19
20
22
2OE
2B0
2B1
2B2
2B3
2B4
2B5
2B6
2B7
3
LOGIC SYMBOL (IEEE/IEC)
BUSHOLD CIRCUIT
Data Input
2DIR
1OE
1DIR
2OE
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
2A0
2A1
2A2
2A3
2A4
2A5
2A6
2A7
48
1
25
24
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
V
CC
G3
3 EN1 [BA]
3 EN2 [AB]
G6
6 EN4 [BA]
6 EN5 [AB]
1
4
74LVCH162245A
74LVC162245A/
5
2
To internal circuit
Product specification
12
13
14
16
17
19
20
22
23
11
SW00196
2
3
5
6
8
9
1B0
1B1
1B2
1B3
1B4
1B5
1B6
1B7
2B0
2B1
2B2
2B3
2B4
2B5
2B6
2B7
SW00044