SIT9501AI-04B3-3310-644.531250E

Oscillators Overview

The SIT9501AI-04B3-3310-644.531250E is a differential MEMS clock oscillator engineered for low-jitter applications requiring standard networking frequencies. It operates at a nominal frequency of 644.53125 MHz with HCSL output signaling. The device features a FlexSwing output driver that provides independent control of voltage swing and DC offset, simplifying interfacing with chipsets having non-standard input voltage requirements. It integrates multiple on-chip regulators to filter power supply noise, eliminating the need for an external dedicated LDO. The component supports a wide temperature range from -40°C to 85°C and accepts a nominal supply voltage of 3.3 V.

Oscillators Feature Summary

• Integrates a unique FlexSwing output driver that performs like LVPECL while allowing independent control of voltage swing and DC offset to simplify chipset interfacing.
• Includes multiple on-chip regulators designed to filter power supply noise, thereby removing the requirement for external dedicated LDOs.
• Factory programmable for specific combinations of frequency, stability, output signaling, voltage, and enable functionality to optimize clock configurations.

Oscillators Applications

• 400G/800G network equipment
• Communications and enterprise systems
• Industrial applications requiring operation in noisy environments

Oscillators Procurement Notes

Verify the exact part number against official SiTime documentation to ensure compatibility with your system's voltage and signaling requirements. Confirm that the HCSL output type matches your receiver inputs. Check the operating temperature range specifications against your environmental conditions. Ensure that the factory-programmed parameters align with your design needs, as these cannot be altered post-production. Cross-reference the package dimensions and pinout with your PCB layout guidelines before finalizing procurement decisions.

Oscillators Selection Notes

Select this component when designing systems that require ultra-low jitter for high-speed serial data applications. The integrated FlexSwing driver is particularly advantageous for interfaces with non-standard voltage requirements, reducing bill-of-materials complexity. Consider the wide continuous power supply voltage range options if your design requires flexibility in power delivery. The factory programmability allows for optimized clock configurations without custom quartz manufacturing lead times, supporting rapid development cycles for communications and enterprise infrastructure projects.

Oscillators Part Context

This model belongs to the SiT9501 series of advanced ultra-low jitter differential XOs designed for standard networking frequencies ranging from 25 MHz to 644.53125 MHz. The series utilizes silicon MEMS resonator technology to deliver precision timing solutions. Unlike traditional quartz devices, these oscillators offer extensive programmability for frequency, stability, and output signaling types. The family is engineered to address the timing challenges in high-performance computing and next-generation electronics, providing robust performance in demanding operational environments.

Oscillators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by matching frequency, voltage, and package specifications before considering alternative components.