Product Overview
The SMB-1352-0-40MQFN-TR-03-0-00 is a SiTime MEMS-based programmable oscillator. Factory-programmable frequency from 1MHz to 220MHz with +/-25ppm stability. Ultra-low 0.5ps RMS phase jitter. Supports LVDS, LVPECL, HCSL, or CMOS outputs. QFN 3.2×2.5mm package. Tape and reel. Superior vibration immunity vs quartz.
Key Specifications
| Type | MEMS Oscillator (SiT8xxx family) |
| Frequency | Programmable (1 MHz to 220 MHz) |
| Frequency Stability | +/-25 ppm |
| Jitter | 0.5 ps RMS (phase jitter 12kHz-20MHz) |
| Supply Voltage | 1.8V / 2.5V / 3.3V |
| Output | Differential (LVDS/LVPECL/HCSL) or CMOS |
| Operating Temp | -40 to +85C |
| Package | QFN (3.2×2.5mm) |
Working Principle
SiTime MEMS oscillators use a silicon MEMS resonator as the frequency reference instead of quartz crystal. The MEMS resonator is fabricated in a hermetically sealed silicon cavity using EpiSeal process. A programmable PLL multiplies the MEMS resonator frequency to the desired output. This architecture provides 10x better vibration immunity, 30x faster start-up (3ms vs 10ms quartz), and 20x better reliability (MTBF) compared to quartz. The one-time programmable (OTP) memory stores frequency and output configuration.
Applications
- Networking
- Telecom
- Storage
- High-reliability clocking