Integrated Circuits |
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74259 |
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8-bit addressable latch |
PDF datasheet |
A0 | 1 • | 16 | Vcc |
A1 | 2 | 15 | MR |
A2 | 3 | 14 | LE |
Q0 | 4 | 13 | D |
Q1 | 5 | 12 | Q7 |
Q2 | 6 | 11 | Q6 |
Q3 | 7 | 10 | Q5 |
GND | 8 | 9 | Q4 |
Pin | Symbol | Description |
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1 | A0 | address input |
2 | A1 | address input |
3 | A2 | address input |
4 | Q0 | latch output |
5 | Q1 | latch output |
6 | Q2 | latch output |
7 | Q3 | latch output |
8 | GND | ground |
9 | Q4 | latch output |
10 | Q5 | latch output |
11 | Q6 | latch output |
12 | Q7 | latch output |
13 | D | data input |
14 | LE | latch enable input (active low) |
15 | MR | conditional reset input (active low) |
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, D to Qn |
18 (74HC) 20 (74HCT) |
ns |
Propagation delay, An to Qn |
17 (74HC) 20 (74HCT) |
ns |
Propagation delay, LE to Qn |
17 (74HC) 20 (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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