SI501-PROG-CAXR

Overview

The SI501-PROG-CAXR is a CMEMS programmable oscillator from Silicon Labs, featuring an LVCMOS output and tri-state enable function. It operates on a supply voltage of 1.71V to 3.63V with a frequency range of 32kHz to 100MHz. The device offers frequency stability options of ±20ppm, ±30ppm, or ±50ppm, including 10-year aging. It supports operating temperatures from -40°C to +85°C and is housed in a 4-SMD, No Lead package measuring 3.20mm x 2.50mm.

Feature Summary

• Utilizes CMEMS technology for excellent short-term stability and long-term aging performance.
• Supports user-selectable rise/fall time options for signal integrity optimization.
• Provides glitchless start and stop functionality for reliable clock tree timing.
• Features industry-standard footprints compatible with common surface-mount processes.

Applications

• Clock distribution in high-speed digital systems
• Timing solutions for network infrastructure equipment
• Embedded systems requiring precise frequency references
• Industrial control applications demanding wide temperature stability

Procurement Notes

Verify the specific frequency stability grade (±20ppm, ±30ppm, or ±50ppm) required for your application, as this variant covers multiple grades. Confirm the operating temperature range matches your environmental needs (-40°C to +85°C). Ensure the LVCMOS output voltage levels are compatible with the receiving logic inputs. Check that the 4-SMD footprint dimensions fit within your PCB layout constraints.

Selection Notes

Select this component when a programmable oscillator with CMEMS stability is needed. Choose based on the required frequency stability tolerance and operating temperature range. Consider the LVCMOS output type for compatibility with standard digital interfaces. Evaluate the 3.20mm x 2.50mm package size against available board space. Compare against other Si50x family members if multi-frequency or different pinout requirements exist.

Part Context

This part belongs to the Si50x series of CMEMS programmable oscillators, which includes Si501, Si502, Si503, and Si504 models. The Si501 variant specifically provides single-frequency operation with an output enable function. It is designed to replace traditional crystal oscillators with more flexible programming capabilities while maintaining small form factors and low power consumption typical of MEMS devices.

Replacement Considerations

Direct replacements may include other Si501 variants with different stability grades or temperature ranges. Cross-reference with Si502 or Si503 if dual or quad frequency outputs are needed instead of single frequency. Verify pin-to-pin compatibility with existing designs before substitution.