DSC8121CI2 Equivalent & Substitute Parts

Part Overview

The DSC8121CI2 is a MEMS-based programmable oscillator manufactured by Microchip Technology, operating across the 10 MHz to 170 MHz frequency range. This XO (Standard) oscillator delivers CMOS output with supply voltage compatibility from 2.25V to 3.6V and includes enable/disable functionality. The device is housed in a 6-SMD, No Lead package measuring 3.20mm × 2.50mm with a maximum seated height of 0.90mm. Currently in active production status with 714 units available in inventory, the DSC8121CI2 serves applications requiring user-programmable frequency selection within its specified range. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and supply chain availability align with the primary device specifications.

Substiute Parts

DSC8121CI2

Microchip TechnologyIn Stock: 803DSC8121CI2 Datasheet

Current PartRFQ

DSC8121CI5

Microchip TechnologyIn Stock: 959DSC8121CI5 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSC8121CI2 is determined by strict alignment across the following critical parameters:

• Manufacturer & Series: Both parts must originate from Microchip Technology within the DSC8121 series to ensure design compatibility and programming protocol consistency.
• Base Resonator & Type: MEMS-based XO (Standard) architecture must be maintained.
• Programmable Type: Blank (User Must Program) designation ensures identical field-programming requirements.
• Frequency Range: 10 MHz ~ 170 MHz coverage must be preserved.
• Output Type: CMOS output specification must match.
• Supply Voltage: 2.25V ~ 3.6V operating range must be supported.
• Operating Temperature: -40°C ~ 85°C range must be maintained.
• Package & Mechanical Dimensions: 6-SMD, No Lead package with 3.20mm × 2.50mm footprint and 0.90mm maximum height ensures PCB layout compatibility.
• Compliance & Certifications: ROHS3 compliance and MSL 1 rating must be preserved.

The DSC8121CI5 qualifies as a parametric equivalent substitute based on full alignment across all these criteria.

Parameter Comparison

Engineering Selection Recommendations

Both the DSC8121CI2 and DSC8121CI5 maintain active product status with Microchip Technology and carry identical ROHS3 compliance and MSL 1 certifications. Selection between these parts should be based on application-specific frequency stability requirements. The DSC8121CI2 operates at ±25ppm frequency stability, while the DSC8121CI5 provides tighter stability at ±10ppm. Applications requiring enhanced frequency accuracy should specify the DSC8121CI5. Both devices are suitable for direct substitution in designs where the mechanical footprint, electrical interface, and supply voltage constraints are identical. Inventory availability should be evaluated at the time of procurement, as the DSC8121CI5 currently shows 873 units in stock compared to 714 units for the DSC8121CI2.

Frequently Asked Questions (FAQ)

Q: Can the DSC8121CI5 directly replace the DSC8121CI2 on an existing PCB?

A: Yes. Both parts share identical package specifications (6-SMD, No Lead), mechanical dimensions (3.20mm × 2.50mm), and electrical interfaces. PCB layout modifications are not required.

Q: What is the primary difference between these two parts?

A: The DSC8121CI5 provides frequency stability of ±10ppm compared to the DSC8121CI2 at ±25ppm. All other electrical and mechanical parameters are equivalent.

Q: Are both parts user-programmable?

A: Yes. Both the DSC8121CI2 and DSC8121CI5 are supplied as blank devices requiring user programming to set the desired output frequency within the 10 MHz to 170 MHz range.

Q: Do these parts require different handling or storage procedures?

A: No. Both parts carry identical Moisture Sensitivity Level (MSL) 1 ratings, indicating unlimited shelf life under normal storage conditions.

Q: Which part should be selected for high-precision timing applications?

A: The DSC8121CI5 with ±10ppm stability is appropriate for applications requiring tighter frequency tolerance. The DSC8121CI2 with ±25ppm stability suits general-purpose oscillator applications.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the DSC8121CI2 and DSC8121CI5 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.