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| PartNumber | MC33978AEK | MC33978AESR2 | MC33978AES |
| Description | Interface - Specialized MC33978AEK/HSOP32///TUBE MULTIPLE DP | Interface - Specialized MC33978AES/HVQFN32///REEL 13 Q2 DP | Interface - Specialized Switch Detection Interface, 22-switches, 3.3 V / 5.0 V SPI , QFN32 |
| Manufacturer | NXP | NXP | NXP |
| Product Category | Interface - Specialized | Interface - Specialized | Interface - Specialized |
| RoHS | Y | Y | Y |
| Type | Switch Detection Interface | Switch Detection Interface | Switch Detection Interface |
| Packaging | Tube | Reel | Tray |
| Product | Switch Detectors | Switch Detectors | Switch Detectors |
| Brand | NXP / Freescale | NXP / Freescale | NXP / Freescale |
| Interface Type | Serial, SPI | Serial, SPI | Serial, SPI |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | Interface - Specialized | Interface - Specialized | Interface - Specialized |
| Protocol Supported | SPI | SPI | SPI |
| Factory Pack Quantity | 42 | 5000 | 490 |
| Subcategory | Interface ICs | Interface ICs | Interface ICs |
| Part # Aliases | 935320644574 | 935312583528 | 935312583557 |
| Unit Weight | 0.017334 oz | 0.002247 oz | 0.002247 oz |