Integrated Circuits |
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74138 |
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3-to-8 line decoder/demultiplexer; inverting |
PDF datasheet |
A0 | 1 • | 16 | Vcc |
A1 | 2 | 15 | Y 0 |
A2 | 3 | 14 | Y 1 |
E 1 | 4 | 13 | Y 2 |
E 2 | 5 | 12 | Y 3 |
E3 | 6 | 11 | Y 4 |
Y 7 | 7 | 10 | Y 5 |
GND | 8 | 9 | Y 6 |
Pin | Symbol | Description |
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1 | A0 | data input 0 |
2 | A1 | data input 1 |
3 | A2 | data input 2 |
4 | E 1 | enable input 1 (active low) |
5 | E 2 | enable input 2 (active low) |
6 | E3 | enable input 3 (active high) |
7 | Y 7 | output 7 |
8 | GND | ground |
9 | Y 6 | output 6 |
10 | Y 5 | output 5 |
11 | Y 4 | output 4 |
12 | Y 3 | output 3 |
13 | Y 2 | output 2 |
14 | Y 1 | output 1 |
15 | Y 0 | output 0 |
16 | Vcc | supply voltage |
Specifications |
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(typical values under recommended operating conditions, unless specified) |
Parameter | Value | Unit |
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Propagation delay, An to Y n |
12 (74HC) 17 (74HCT) |
ns |
Propagation delay, E3 to Y n |
14 (74HC) 19 (74HCT) |
ns |
Propagation delay, E n to Y n |
14 (74HC) 19 (74HCT) |
ns |
Note |
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Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information. |
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