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| Part Number | SN74ALS27AD | SN74ALS27AN | SN74ALS27ADR | SN74ALS20AD | SN74ALS21AD |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Active | Active |
| Logic Type | NOR Gate | NOR Gate | NOR Gate | NAND Gate | AND Gate |
| Number of Circuits | 3 | 3 | 3 | 2 | 2 |
| Number of Inputs | 3 | 3 | 3 | 4 | 4 |
| Features | - | - | - | - | - |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Current - Quiescent (Max) | - | - | - | - | - |
| Current - Output High, Low | 400µA, 8mA | 400µA, 8mA | 400µA, 8mA | 400µA, 8mA | 400µA, 8mA |
| Logic Level - Low | 0.8V | 0.8V | 0.8V | 0.8V | 0.8V |
| Logic Level - High | 2V | 2V | 2V | 2V | 2V |
| Max Propagation Delay @ V, Max CL | 15ns @ 5V, 50pF | 15ns @ 5V, 50pF | 15ns @ 5V, 50pF | 12.5ns @ 5V, 50pF | 15ns @ 5V, 50pF |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 14-SOIC | 14-PDIP | 14-SOIC | 14-SOIC | 14-SOIC |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-DIP (0.300", 7.62mm) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
