74AHC257 Philips Semiconductors, 74AHC257 Datasheet - Page 4

• Manufacturer Part Number: 74AHC257
• Description: Quad 2-input multiplexer; 3-state
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2000 Apr 03
handbook, halfpage
handbook, halfpage
Quad 2-input multiplexer; 3-state
GND
1I 0
1I 1
2I 0
2I 1
Fig.1 Pin configuration.
Fig.3 IEC logic symbol.
1Y
2Y
15
S
11
10
14
13
1
2
3
5
6
1
2
3
4
5
6
7
8
G1
EN
1
1
MUX
257
MNA536
MNA538
16
15
14
13
12
11
10
9
12
4
7
9
V CC
OE
4I 0
4I 1
4Y
3I 0
3I 1
3Y
4
handbook, halfpage
handbook, halfpage
15
11
10
14
13
1
2
3
5
6
1I 0
1I 1
2I 0
2I 1
3I 0
3I 1
4I 0
4I 1
OE
S
1I 0 1I 1 2I 0 2I 1 3I 0 3I 1 4I 0 4I 1
Fig.4 Functional diagram.
2
SELECTOR
Fig.2 Logic symbol.
3
S
1
1Y
5
4
2Y
6
7
MULTIPLEXER
11
3Y
9
OUTPUTS
3-STATE
12
10
4Y
74AHCT257
Product specification
74AHC257;
OE
15
14
13
MNA537
1Y
2Y
3Y
4Y 12
MNA540
4
7
9