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| Part Number | SN74LS26DR | SN74LS28DR | SN74LS27DR | SN74LS26DR2 | SN74LS20DR | SN74LS21DR | SN74LS266DR | SN74LS26D |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Motorola | Texas Instruments | Texas Instruments | Texas Instruments | Motorola |
| Product Status | Active | Active | Active | Active | Active | Active | Obsolete | Obsolete |
| Logic Type | NAND Gate | - | NOR Gate | - | NAND Gate | AND Gate | XNOR (Exclusive NOR) | NAND Gate |
| Number of Circuits | 4 | - | 3 | - | 2 | 2 | 4 | 4 |
| Number of Inputs | 2 | - | 3 | - | 4 | 4 | 2 | 2 |
| Features | Open Collector | - | - | - | - | - | Open Collector | Open Collector |
| Voltage - Supply | 4.75V ~ 5.25V | - | 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 | - | 800 µA | - | - | - |
| Current - Output High, Low | -, 8mA | - | 400µA, 8mA | - | 400µA, 8mA | 400µA, 8mA | -, 8mA | -, 8mA |
| Logic Level - Low | 0.8V | - | 0.8V | - | 0.8V | 0.8V | 0.8V | 0.8V |
| Logic Level - High | 2V | - | 2V | - | 2V | 2V | 2V | 2V |
| Max Propagation Delay @ V, Max CL | 32ns @ 5V, 15pF | - | 15ns @ 5V, 15pF | - | 15ns @ 5V, 15pF | 20ns @ 5V, 15pF | 30ns @ 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 | 0°C ~ 70°C |
| Mounting Type | Surface Mount | - | Surface Mount | - | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 14-SOIC | - | 14-SOIC | - | 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) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
