| PartNumber | DS21Q43AT+ | DS21Q43-ATN | DS21Q43AT |
| Description | Telecom Interface ICs Quad E1 Framer | Telecom Interface ICs Quad E1 Framer | Telecom Interface ICs Quad E1 Framer |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Telecom Interface ICs | Telecom Interface ICs | Telecom Interface ICs |
| RoHS | Y | N | N |
| Product | E1 Framers | E1 Framers | E1 Framers |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Minimum Operating Temperature | 0 C | - 40 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 85 C | + 70 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | LQFP-128 | TQFP-128 | LQFP-128 |
| Packaging | Tube | Tube | Tube |
| Data Rate | 1.544 Mb/s | 1.544 Mb/s | 1.544 Mb/s |
| Series | DS21Q43AT | DS21Q43-ATN | DS21Q43AT |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Number of Channels | 4 Channel | 4 Channel | 4 Channel |
| Operating Supply Voltage | 5 V | 5 V | 5 V |
| Product Type | Telecom Interface ICs | Telecom Interface ICs | Telecom Interface ICs |
| Factory Pack Quantity | 72 | 72 | 72 |
| Subcategory | Interface ICs | Interface ICs | Interface ICs |
| Part # Aliases | 90-21Q43+AT0 DS21Q43AT | 90-21Q43-ATN DS21Q43-ATN | 90-21Q43-AT0 DS21Q43AT |
| Unit Weight | 0.021693 oz | 0.017760 oz | 0.021693 oz |
| Moisture Sensitive | - | Yes | Yes |