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| Part Number | 251M-38LF | 251M-29LFT | 251M-29LF | 251MI-34LFT | 251M-35LF |
| Manufacturer | Renesas Electronics Corporation | Renesas Electronics Corporation | Renesas Electronics Corporation | Renesas Electronics Corporation | Renesas Electronics Corporation |
| Series | - | - | - | - | - |
| Package/Case | - | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | - | - |
| Packaging | Tube | Tape & Reel (TR) | Tube | Bulk | Bulk |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Programmable | Not Verified | Not Verified | Not Verified | - | - |
| Type | - | Clock/Frequency Synthesizer, Spread Spectrum Clock Generator | Clock/Frequency Synthesizer, Spread Spectrum Clock Generator | - | - |
| PLL | - | Yes | Yes | - | - |
| Input | - | Clock, Crystal | Clock, Crystal | - | - |
| Output | - | CMOS | CMOS | - | - |
| Number of Circuits | - | 1 | 1 | - | - |
| Ratio - Input:Output | - | 1:1 | 1:1 | - | - |
| Differential - Input:Output | - | No/No | No/No | - | - |
| Frequency - Max | - | 200MHz | 200MHz | - | - |
| Divider/Multiplier | - | Yes/No | Yes/No | - | - |
| Voltage - Supply | - | 3.15V ~ 3.45V | 3.15V ~ 3.45V | - | - |
| Operating Temperature | - | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | - | - |
| Mounting Type | - | Surface Mount | Surface Mount | - | - |
| Grade | - | - | - | - | - |
| Qualification | - | - | - | - | - |
| Supplier Device Package | - | 8-SOIC | 8-SOIC | - | - |
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