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| Part Number | CD74HCT27M | CD74HCT27MT | CD74HCT20M | CD74HCT21M | CD74HCT27E |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Harris Corporation |
| Product Status | Active | Obsolete | Active | Active | Obsolete |
| Logic Type | NOR Gate | NOR Gate | NAND Gate | AND Gate | NOR Gate |
| Number of Circuits | 3 | 3 | 2 | 2 | 3 |
| Number of Inputs | 3 | 3 | 4 | 4 | 3 |
| Features | - | - | - | - | - |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Current - Quiescent (Max) | 2 µA | 2 µA | 2 µA | 2 µA | 2 µA |
| Current - Output High, Low | 4mA, 4mA | 4mA, 4mA | 4mA, 4mA | 4mA, 4mA | 4mA, 4mA |
| 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 | 23ns @ 4.5V, 50pF | 23ns @ 4.5V, 50pF | 28ns @ 4.5V, 50pF | 27ns @ 4.5V, 50pF | 23ns @ 4.5V, 50pF |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Through Hole |
| Supplier Device Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-PDIP |
| 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-DIP (0.300", 7.62mm) |
