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| PartNumber | DS21Q552 | DS21Q552+ | DS21Q55 |
| Description | Telecom Interface ICs 5V Quad T1 Transceiver | Telecom Interface ICs 5V Quad T1 Transceiver | IC TXRX QUAD T1/E1/J1 SCT 256BGA |
| Manufacturer | Maxim Integrated | Maxim Integrated | - |
| Product Category | Telecom Interface ICs | Telecom Interface ICs | - |
| Product | T1/E1 Line Interface Units - LIUs | T1/E1 Line Interface Units - LIUs | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | BGA | BGA | - |
| Packaging | Tube | Tube | - |
| Series | DS21Q552 | DS21Q552 | - |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Number of Channels | 4 Channel | 4 Channel | - |
| Moisture Sensitive | Yes | - | - |
| Operating Supply Voltage | 5 V | 5 V | - |
| Product Type | Telecom Interface ICs | Telecom Interface ICs | - |
| Factory Pack Quantity | 40 | 40 | - |
| Subcategory | Interface ICs | Interface ICs | - |
| Part # Aliases | 90-21Q55-200 DS21Q552 | 90-21Q55+200 DS21Q552 | - |
| RoHS | - | Y | - |