74639 Octal O.C./3-state Bus Transceiver
Pin Arrangement
Electrical Characteristics
Input | Output | N | LS | ALS | ALS 1000 | F | S | AS | AS 1000 | HC | HCT | Unit [max] |
---|---|---|---|---|---|---|---|---|---|---|---|---|
A | B | - | 15 | 12 | 21 | - | - | 9.5 | - | - | - | nS |
B | A (OC) | - | 25 | 30 | 9 | - | - | 22 | - | - | - | nS |
G' | A (OC) | - | 50 | 35 | 23 | - | - | 21.5 | - | - | - | nS |
B | - | 40 | 25 | 17 | - | - | 10.5 | - | - | - | nS | |
VOH of OC = 5.5V [max] |
N | LS | ALS | ALS 1000 | F | S | AS | AS 1000 | Unit | ||
---|---|---|---|---|---|---|---|---|---|---|
A,B | High | - | 20 | 20 | 20 | - | - | 50 | - | uA |
Low | - | 0.4 | 0.1 | 0.1 | - | - | 0.75 | - | mA | |
G',DIR | High | - | 20 | 20 | 20 | - | - | 20 | - | uA |
Low | - | 0.4 | 0.1 | 0.1 | - | - | 0.5 | - | mA |
N | LS | ALS | ALS 1000 | F | S | AS | AS 1000 | HC | HCT | Unit | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|
3S | High | - | 15 | 15 | 15 | - | - | 15 | - | - | - | mA |
Low | - | 24 | 24 | 16 | - | - | 64 | - | - | - | mA | |
High@High-Z | - | 400 | - | - | - | - | - | - | - | - | uA | |
Low@High-Z | - | 20 | - | - | - | - | - | - | - | - | uA | |
OC | High@High-Z | - | 100 | 100 | 100 | - | - | 100 | - | - | - | uA |
Low@High-Z | - | 24 | 24 | 16 | - | - | 64 | - | - | - | mA |
Reference
IC # | Logic | Output Type | Comment |
---|---|---|---|
74LS638 | Inverted | OC / Tri-State | . |
74LS639 | Non-Inverted | OC / Tri-State | . |
74LS640 | Inverted | Tri-State | . |
74LS641 | Non-Inverted | OC | . |
74LS642 | Inverted | OC | . |
74LS643 | Inverted / Non-Inverted | Tri-State | . |
74LS644 | Inverter / Non-Inverted | OC | . |
74LS645 | Non-Inverted | Tri-State | = 74LS245 |