DSC8121CM2 Equivalent & Substitute Parts

Part Overview

The DSC8121CM2 is a MEMS-based programmable oscillator manufactured by Microchip Technology, operating across the 10 MHz to 170 MHz frequency range. This XO (Standard) device delivers CMOS output with supply voltage compatibility from 2.25V to 3.6V and includes Enable/Disable functionality. The part 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 1078 pieces available in new original inventory, the DSC8121CM2 serves applications requiring user-programmable frequency selection within its specified range. Identifying equivalent substitute parts becomes necessary when addressing supply chain constraints, inventory availability, or specific performance requirements within the allowed parametric envelope.

Substiute Parts

DSC8121CM2

Microchip TechnologyIn Stock: 1103DSC8121CM2 Datasheet

Current PartRFQ

DSC8121CM1

Microchip TechnologyIn Stock: 1435DSC8121CM1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSC8121CM2 is determined by strict parametric alignment across the following critical criteria:

Mandatory Matching Parameters:

• Manufacturer: Microchip Technology
• Series: DSC8121
• Base Resonator: MEMS
• Type: XO (Standard)
• Programmable Type: Blank (User Must Program)
• Available Frequency Range: 10 MHz ~ 170 MHz
• Output: CMOS
• Voltage - Supply: 2.25V ~ 3.6V
• Function: Enable/Disable
• Current - Supply (Max): 35mA
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 6-SMD, No Lead
• Size / Dimension: 3.20mm × 2.50mm
• Height - Seated (Max): 0.90mm
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Allowable Variation Parameters:

• Frequency Stability (Total): ±25ppm (DSC8121CM2) to ±50ppm (DSC8121CM1)
• Moisture Sensitivity Level (MSL): 3 (168 Hours) to 1 (Unlimited)

The DSC8121CM1 qualifies as a parametric equivalent because it maintains identical specifications across all mandatory parameters while permitting relaxed frequency stability and improved moisture handling characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the DSC8121CM2 and DSC8121CM1 maintain active product status from Microchip Technology and carry identical ROHS3 compliance and REACH Unaffected certifications, confirming regulatory alignment for industrial and commercial applications.

The DSC8121CM2 provides tighter frequency stability at ±25ppm total, suitable for applications with stringent frequency accuracy requirements. The DSC8121CM1 offers relaxed frequency stability at ±50ppm with superior moisture handling (MSL 1 versus MSL 3), making it appropriate for extended storage periods or humid environment exposure without bake-out procedures.

Selection between these parts depends on application-specific frequency accuracy demands and supply chain availability. Both parts are electrically and mechanically interchangeable within the DSC8121 series envelope, with no circuit redesign required for substitution.

Frequently Asked Questions (FAQ)

Q: Can DSC8121CM1 replace DSC8121CM2 in existing designs?

A: Yes. Both parts share identical electrical and mechanical specifications across all critical parameters including frequency range, supply voltage, output type, package dimensions, and thermal operating range. The primary differences are frequency stability tolerance and moisture sensitivity rating, which do not affect pin compatibility or functional operation.

Q: What is the difference in frequency stability between these parts?

A: DSC8121CM2 specifies ±25ppm total frequency stability, while DSC8121CM1 specifies ±50ppm. Applications requiring frequency accuracy better than ±50ppm must use DSC8121CM2. Applications tolerating ±50ppm or greater deviation can use either part.

Q: How do the moisture sensitivity levels differ?

A: DSC8121CM2 carries MSL 3 rating (168-hour floor life), requiring bake-out procedures if storage exceeds 168 hours in high-humidity conditions. DSC8121CM1 carries MSL 1 rating (unlimited floor life), eliminating moisture-related handling constraints. Both parts use identical 6-SMD, No Lead packaging.

Q: Are there any supply chain advantages to using DSC8121CM1?

A: Current inventory shows 1406 pieces of DSC8121CM1 available versus 1078 pieces of DSC8121CM2, providing greater availability for DSC8121CM1. Both parts are manufactured by Microchip Technology and maintain active production status.

Q: Do these parts require identical PCB layout and soldering profiles?

A: Yes. Both parts use the same 6-SMD, No Lead package with identical 3.20mm × 2.50mm footprint and 0.90mm maximum seated height. PCB layout, solder paste stencil, and reflow profiles remain unchanged during substitution.