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| Part Number | 74LS21PC | 74LS51PC | 74LS27PC | 74LS26PC | 74LS28PC | 74LS11PC | 74LS20PC | 74LS21DC |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | National Semiconductor | National Semiconductor | National Semiconductor | National Semiconductor | National Semiconductor | National Semiconductor | National Semiconductor | National Semiconductor |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active |
| Logic Type | - | - | - | - | - | - | - | - |
| Number of Circuits | - | - | - | - | - | - | - | - |
| Number of Inputs | - | - | - | - | - | - | - | - |
| Features | - | - | - | - | - | - | - | - |
| Voltage - Supply | - | - | - | - | - | - | - | - |
| Current - Quiescent (Max) | - | - | - | - | - | - | - | - |
| Current - Output High, Low | - | - | - | - | - | - | - | - |
| Logic Level - Low | - | - | - | - | - | - | - | - |
| Logic Level - High | - | - | - | - | - | - | - | - |
| Max Propagation Delay @ V, Max CL | - | - | - | - | - | - | - | - |
| Operating Temperature | - | - | - | - | - | - | - | - |
| Mounting Type | - | - | - | - | - | - | - | - |
| Supplier Device Package | - | - | - | - | - | - | - | - |
| Package / Case | - | - | - | - | - | - | - | - |
