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| Part Number | SN74HC27DT | SN74HC20DT | SN74HC21DT | SN74HC27D | SN74HC27DR |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Discontinued at Digi-Key | Active | Active | Active |
| Logic Type | NOR Gate | NAND Gate | AND Gate | NOR Gate | NOR Gate |
| Number of Circuits | 3 | 2 | 2 | 3 | 3 |
| Number of Inputs | 3 | 4 | 4 | 3 | 3 |
| Features | - | - | - | - | - |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V |
| Current - Quiescent (Max) | 2 µA | 2 µA | 2 µA | 2 µA | 2 µA |
| Current - Output High, Low | 5.2mA, 5.2mA | 5.2mA, 5.2mA | 5.2mA, 5.2mA | 5.2mA, 5.2mA | 5.2mA, 5.2mA |
| Logic Level - Low | 0.5V ~ 1.8V | 0.5V ~ 1.8V | 0.5V ~ 1.8V | 0.5V ~ 1.8V | 0.5V ~ 1.8V |
| Logic Level - High | 1.5V ~ 4.2V | 1.5V ~ 4.2V | 1.5V ~ 4.2V | 1.5V ~ 4.2V | 1.5V ~ 4.2V |
| Max Propagation Delay @ V, Max CL | 15ns @ 6V, 50pF | 19ns @ 6V, 50pF | 19ns @ 6V, 50pF | 15ns @ 6V, 50pF | 15ns @ 6V, 50pF |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 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) |
