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| Part Number | SN74AS27DR | SN74AS20DR | SN74AS21DR | SN74AS27D |
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Obsolete | Obsolete | Active |
| Logic Type | NOR Gate | NAND Gate | AND Gate | NOR Gate |
| Number of Circuits | 3 | 2 | 2 | 3 |
| Number of Inputs | 3 | 4 | 4 | 3 |
| Features | - | - | - | - |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Current - Quiescent (Max) | - | - | - | - |
| Current - Output High, Low | 2mA, 20mA | 2mA, 20mA | 2mA, 20mA | 2mA, 20mA |
| Logic Level - Low | 0.8V | 0.8V | 0.8V | 0.8V |
| Logic Level - High | 2V | 2V | 2V | 2V |
| Max Propagation Delay @ V, Max CL | 5.5ns @ 5V, 50pF | 5ns @ 5V, 50pF | 6ns @ 5V, 50pF | 5.5ns @ 5V, 50pF |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
