1 to 220 MHz, Differential Digitally-controlled XO
The SiT3921 is a highly flexible, differential DCXO with LVPECL and LVDS outputs. This programmable device supports any frequency, 1 to 220 MHz, along with any combination of voltage (1.8 V, 2.5 V-3.3 V), pull range (±25 ppm to ±200 ppm) and package (3225, 5032, 7050). It enables frequency tuning via a unique one-wire interface, eliminating frequency drift that is caused by board noise and simplifying PLL and clock synchronization design. It comes in 3 industry-standard 6-pin packages (3.2x2.5 mm, 5.0x3.2 mm, 7.0x5.0 mm).
View related products:220 to 625 MHz|I2C/SPI digital control

Oscillator Type | DCXO-DE |
Frequency | 1 to 220 MHz |
频率稳定性(PPM) | ±10,±25,±50 |
阶段抖动(RMS) | 0.5 PS. |
输出类型 | LVPECL, LVDS |
工作温度范围(°C) | -20至+70,-40至+85 |
Pull Range (ppm) | ±25, ±50, ±100, ±200, ±400, ±800, ±1600 |
Voltage Supply (V) | 2.5,3.3 |
Package Type (mm²) | 3.2x2.5, 5.0x3.2, 7.0x5.0 |
Features | Digitally controlled, Field Programmable |
Availability | Production |
三种行业标准占用额外的替换石英VCXO,具有次要设计修改
- Digitally controlled 1 ppb frequency pull resolution
- 频率从1 MHz到220 MHz
- Supply voltage of 1.8 V; 2.5 V to 3.3 V
- Frequency stability from ±10 ppm to ±50 ppm
- Pull range from ±25 ppm to ±1600 ppm:
- Eliminating a need for external DAC
- 定制规范,以获得最佳系统性能
- Easy availability of any device specifications within the operating range
One-wire digital frequency tuning
- 软件控制系统PLL中的更简单的环路控制
- 更一致的PLL带宽在工作范围内
- Faster calibration and lock time
- Reduction of modulation harmonics;
Three industry-standard packages
- Minor modification to existing design using VCXO to adopt the DCXO;
4至6周的提前时间
- 减少库存开销
- Mitigate shortage risks
- 网络和通信系统
- Networked video systems and digitizers
- 抖动清洁剂
- Networked audio systems
- Instrumentation
- Low-bandwidth analog phase locked loop (PLL)
- FPGA data recovery
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Evaluation Boards (联系Silime.)– SiT6097 (3225) | SiT6086 (5032) | SiT6085 (7050)
Reliability Calculator– Get FIT/MTBF data for various operating conditions
Frequency Slope (dF/dT) Calculator– Calculate frequency slope over temperature
qfn 3225 6-pins|QFN 5032 6-Pins|qfn 7050 6-pins- 使用QFN预览包3D step models