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| Part Number | SN74HCS27DR | SN74HCS20DR | SN74HCS21DR |
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active |
| Logic Type | NOR Gate | NAND Gate | AND Gate |
| Number of Circuits | 3 | 2 | 2 |
| Number of Inputs | 3 | 4 | 4 |
| Features | Schmitt Trigger Input | Schmitt Trigger Input | Schmitt Trigger Input |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V |
| Current - Quiescent (Max) | 2 µA | 2 µA | 2 µA |
| Current - Output High, Low | 7.8mA, 7.8mA | -, 7.8mA | -, 7.8mA |
| Logic Level - Low | 1V ~ 3V | 1V ~ 3V | 1V ~ 3V |
| Logic Level - High | 1.5V ~ 4.2V | 1.5V ~ 4.2V | 1.5V ~ 4.2V |
| Max Propagation Delay @ V, Max CL | 12ns @ 6V, 50pF | 19ns @ 6V, 50pF | 16ns @ 6V, 50pF |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 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) |
