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| Part Number | MM74HCT251M | MM74HCT257M | MM74HCT251N | MM74HC251M |
|---|---|---|---|---|
| Manufacturer | National Semiconductor | National Semiconductor | National Semiconductor | Fairchild Semiconductor |
| Product Status | Active | Active | Active | Obsolete |
| Type | Multiplexer | Multiplexer | Multiplexer | Multiplexer |
| Circuit | 1 x 8:1 | 4 x 2:1 | 1 x 8:1 | 1 x 8:1 |
| Independent Circuits | 1 | 1 | 1 | 1 |
| Current - Output High, Low | 4mA, 4mA | 6mA, 6mA | 4mA, 4mA | 5.2mA, 5.2mA |
| Voltage Supply Source | Single Supply | Single Supply | Single Supply | Single Supply |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 2V ~ 6V |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Through Hole | Surface Mount |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-DIP (0.300", 7.62mm) | 16-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 16-SOIC | 16-SOIC | 16-PDIP | 16-SOIC |
