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| Part Number | 74F399SCX | 74F399SJX | 74F398SCX | 74F399SC | 
|---|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | 
| Product Status | Obsolete | Obsolete | Active | Obsolete | 
| Type | Multiplexer | Multiplexer | Multiplexer | Multiplexer | 
| Circuit | 4 x 2:1 | 4 x 2:1 | 4 x 2:1 | 4 x 2:1 | 
| Independent Circuits | 1 | 1 | 1 | 1 | 
| Current - Output High, Low | 1mA, 20mA | 1mA, 20mA | 1mA, 20mA | 1mA, 20mA | 
| 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 | 4.5V ~ 5.5V | 
| Operating Temperature | 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 | 
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.209", 5.30mm Width) | 20-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | 16-SOIC | 16-SOP | 20-SOIC | 16-SOIC |