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 [email protected]. Full transition to SiTime is expected by late 2026.
| CAD Model: | View CAD Model |
| Pkg. Type: | SSOP |
| Pkg. Code: | PYG28 |
| Lead Count (#): | 28 |
| Pkg. Dimensions (mm): | 10.2 x 5.3 x 1.73 |
| Pitch (mm): | 0.65 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
| Moisture Sensitivity Level (MSL) | 1 |
| Pkg. Type | SSOP |
| Lead Count (#) | 28 |
| Pb (Lead) Free | Yes |
| Carrier Type | Reel |
| C-C Jitter Max P-P (ps) | 300 |
| Chipset Manufacturer | AMD |
| Clock Spec. | Geode |
| Core Voltage (V) | 3.3 |
| Function | Clock Generator |
| Input Freq (MHz) | 14.3182 - 14.3182 |
| Input Type | Crystal |
| Length (mm) | 10.2 |
| MOQ | 1500 |
| Moisture Sensitivity Level (MSL) | 1 |
| Output Freq Range (MHz) | 14.318 - 66 |
| Output Skew (ps) | 250 |
| Output Voltage (V) | 3.3 |
| Outputs (#) | 12 |
| Package Area (mm²) | 54.1 |
| Pb Free Category | e3 Sn |
| Pitch (mm) | 0.65 |
| Pkg. Dimensions (mm) | 10.2 x 5.3 x 1.73 |
| Qty. per Carrier (#) | 0 |
| Qty. per Reel (#) | 1500 |
| Reel Size (in) | 13 |
| Reference Output | Yes |
| Requires Terms and Conditions | Does not require acceptance of Terms and Conditions |
| Spread Spectrum | No |
| Supply Voltage (V) | 3.3 - 3.3 |
| Tape & Reel | Yes |
| Temp. Range (°C) | -40 to 85°C |
| Thickness (mm) | 1.73 |
| Width (mm) | 5.3 |
| Xtal Freq (MHz) | 14.318 - 14.318 |
| Xtal Inputs (#) | 1 |
The MK1491-09 is a low cost, low jitter, high performance clock synthesizer for AMD's Geode™ GX2 processor for information appliance applications. Using patented analog Phase-Locked Loop (PLL) techniques, the device accepts a 14.318 MHz crystal input to produce multiple output clocks. It provides selectable PCI local bus clocks, 48 MHz clocks for Super I/O and USB, as well as multiple Reference outputs. The device has a power down mode to reduce power consumption.