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| PartNumber | 8T49N281B-998NLGI8 | 8T49N281B-998NLGI | 8T49N281B-999NLGI |
| Description | Clock Generators & Support Products FemtoClock Universal Frequency Translato | Clock Generators & Support Products FemtoClock Universal Frequency Translato | Clock Generators & Support Products FemtoClock Universal Frequency Translato |
| Manufacturer | IDT, Integrated Device Technology Inc | IDT, Integrated Device Technology Inc | IDT |
| Product Category | Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers | Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers | Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers |
| Series | FemtoClockR NG | FemtoClockR NG | FemtoClockR NG |
| Type | Clock Translators | Clock Translators | Clock Translators |
| Packaging | Tape & Reel (TR) Alternate Packaging | Tray Alternate Packaging | Tray Alternate Packaging |
| Unit Weight | 0.006751 oz | 191400 mg | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package Case | QFN-56 | 56-VFQFN Exposed Pad | VFQFPN-56 |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Output Type | LVDS LVPECL | LVDS LVPECL | LVDS LVPECL |
| Voltage Supply | 2.375 V ~ 3.465 V | 2.375 V ~ 3.465 V | 2.375 V ~ 3.465 V |
| Supplier Device Package | 56-VFQFN (8x8) | 56-VFQFN (8x8) | 56-VFQFN (8x8) |
| PLL | Yes with Bypass | Yes with Bypass | Yes with Bypass |
| Input | Crystal | Crystal | Crystal |
| Output | LVCMOS, LVPECL | LVCMOS, LVPECL | LVPECL |
| Number of Circuits | 1 | 1 | 1 |
| Ratio InputOutput | 1899/12/30 1:08:00 | 1899/12/30 1:08:00 | 1899/12/30 1:08:00 |
| Differential InputOutput | No/Yes | No/Yes | No/Yes |
| Frequency Max | - | - | - |
| Divider Multiplier | Yes/No | Yes/No | Yes/No |
| Number of Outputs | 8 Output | 8 Output | 8 Output |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Operating Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| Maximum Input Frequency | 875 MHz | 875 MHz | 875 MHz |
| Max Output Freq | 1000 MHz | 1000 MHz | 1000 MHz |
| Part # Aliases | - | - | 8T49N281I |