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| Part Number | SN74LS27NSR | SN74LS37NSR | SN74LS20NSR | SN74LS21NSR | SN74LS26NSR |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Active | Obsolete |
| Logic Type | NOR Gate | NAND Gate | NAND Gate | AND Gate | NAND Gate |
| Number of Circuits | 3 | 4 | 2 | 2 | 4 |
| Number of Inputs | 3 | 2 | 4 | 4 | 2 |
| Features | - | - | - | - | Open Collector |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Current - Quiescent (Max) | 4 mA | 2 mA | 800 µA | - | - |
| Current - Output High, Low | 400µA, 8mA | 1.2mA, 24mA | 400µA, 8mA | 400µA, 8mA | -, 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, 15pF | 24ns @ 5V, 45pF | 15ns @ 5V, 15pF | 20ns @ 5V, 15pF | 32ns @ 5V, 15pF |
| 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 | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 14-SO | 14-SO | 14-SO | 14-SO | 14-SO |
| Package / Case | 14-SOIC (0.209", 5.30mm Width) | 14-SOIC (0.209", 5.30mm Width) | 14-SOIC (0.209", 5.30mm Width) | 14-SOIC (0.209", 5.30mm Width) | 14-SOIC (0.209", 5.30mm Width) |
