Renesas’ Timing product portfolio has been acquired by SiTime.
Datasheets, documentation, and sample orders remain available on Renesas.com through late 2026. For new designs, purchasing, support, and product inquiries, visit SiTime.com or send an email to SalesClocks@sitime.com. Full transition to SiTime is expected by late 2026.
| CAD Model: | View CAD Model |
| Pkg. Type: | SOIC |
| Pkg. Code: | DCG8 |
| Lead Count (#): | 8 |
| Pkg. Dimensions (mm): | 4.9 x 3.9 x 1.5 |
| Pitch (mm): | 1.27 |
| Moisture Sensitivity Level (MSL) | 1 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
| Lead Count (#) | 8 |
| Carrier Type | Tube |
| Moisture Sensitivity Level (MSL) | 1 |
| Qty. per Reel (#) | 0 |
| Qty. per Carrier (#) | 97 |
| Pb (Lead) Free | Yes |
| Pb Free Category | e3 Sn |
| Temp. Range (°C) | 0 to 70°C |
| Country of Assembly | THAILAND |
| Country of Wafer Fabrication | SINGAPORE |
| App Jitter Compliance | PCIe Gen1 |
| Architecture | Common |
| C-C Jitter Max P-P (ps) | 80 |
| C-C Jitter Typ P-P (ps) | 65 |
| Core Voltage (V) | 3.3 |
| Diff. Output Signaling | HCSL |
| Diff. Outputs | 1 |
| Diff. Termination Resistors | 4 |
| Input Freq (MHz) | 25 - 25 |
| Input Type | Crystal, LVCMOS |
| Inputs (#) | 1 |
| Length (mm) | 4.9 |
| MOQ | 291 |
| Output Banks (#) | 1 |
| Output Freq Range (MHz) | 100 - 100 |
| Output Type | HCSL |
| Output Voltage (V) | 3.3 |
| Outputs (#) | 1 |
| PLL | Yes |
| Package Area (mm²) | 19.1 |
| Pitch (mm) | 1.27 |
| Pkg. Dimensions (mm) | 4.9 x 3.9 x 1.5 |
| Pkg. Type | SOIC |
| Power Consumption Typ (mW) | 182 |
| Price (USD) | $3.082 |
| Product Category | PCI Express Clocks |
| Prog. Clock | No |
| Requires Terms and Conditions | Does not require acceptance of Terms and Conditions |
| Supply Voltage (V) | 3.3 - 3.3 |
| Tape & Reel | No |
| Thickness (mm) | 1.5 |
| Width (mm) | 3.9 |
| Xtal Freq (MHz) | 25 - 25 |
The 557-01 is a clock chip designed for use in PCI Express® cards as a clock source. It provides a pair of differential outputs at 100MHz in a small 8-pin SOIC package. Using Renesas' patented Phase-Locked Loop (PLL) techniques, the device takes a 25MHz crystal input and produces HCSL (Host Clock Signal Level) differential outputs at 100MHz clock frequency. LVDS signal levels can also be supported via an alternative termination scheme.