7M-27.120MBGE-T Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The 7M-27.120MBGE-T is a 27.12 MHz fundamental mode crystal manufactured by TXC CORPORATION in active product status. This surface mount crystal is specified for 12pF load capacitance with 60 Ohms equivalent series resistance (ESR), housed in a 4-SMD no-lead package measuring 3.20mm x 2.50mm. The component operates across the industrial temperature range of -40°C to 85°C with ±50ppm frequency stability and tolerance. Identification of equivalent substitute parts becomes necessary when primary inventory is unavailable, when supply chain optimization is required, or when design flexibility permits component alternatives that maintain electrical and mechanical compatibility within specified parameters.

Substiute Parts

7M-27.120MBGE-T

TXC CORPORATIONIn Stock: 8257M-27.120MBGE-T Datasheet

Current PartRFQ

LFXTAL059815REEL

IQD Frequency ProductsIn Stock: 2156LFXTAL059815REEL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7M-27.120MBGE-T is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 27.12 MHz (exact match required)
• Frequency Stability: ±50ppm (tolerance specification)
• Operating Mode: Fundamental
• Package / Case: 4-SMD, No Lead
• Size / Dimension: 3.20mm x 2.50mm
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C to 85°C minimum

Allowable Variation Parameters:

• Load Capacitance: Substitutes with 10pF load capacitance are acceptable when circuit design permits load capacitance adjustment through external tuning capacitors
• ESR: Substitutes with lower ESR values (50 Ohms versus 60 Ohms) are acceptable as they improve oscillator performance characteristics
• Compliance Certifications: RoHS3 compliance is acceptable as a higher standard than RoHS Compliant

The LFXTAL059815REEL from IQD Frequency Products meets all mandatory matching parameters while offering improved ESR performance. Load capacitance difference requires circuit-level verification but does not preclude substitution in applications with tuning capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: 7M-27.120MBGE-T

The TXC CORPORATION 7M-27.120MBGE-T remains the specified component with active product status and confirmed inventory of 801 pieces. This part carries RoHS Compliant certification and is suitable for applications requiring 12pF load capacitance with 60 Ohms ESR.

Substitute Part: LFXTAL059815REEL

The IQD Frequency Products LFXTAL059815REEL is qualified as an equivalent substitute based on identical frequency, stability, operating mode, package, dimensions, and temperature range. This substitute offers the following characteristics:

• Active product status with higher inventory availability (2064 pieces)
• ROHS3 Compliant certification (exceeds RoHS Compliant requirement)
• Improved ESR performance at 50 Ohms (versus 60 Ohms primary)
• Load capacitance of 10pF (versus 12pF primary)

The 2pF load capacitance difference is accommodated through standard oscillator circuit design practices. Applications utilizing external load capacitance tuning networks can directly substitute this part. Applications with fixed load capacitance networks require circuit-level analysis to confirm frequency accuracy within ±50ppm specification.

Both parts maintain identical regulatory compliance (REACH Unaffected, EAR99 classification, HTSUS 8541.60.0060) and are suitable for industrial temperature range applications from -40°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can the LFXTAL059815REEL directly replace the 7M-27.120MBGE-T without circuit modification?

A: Direct substitution is possible in applications where the oscillator circuit includes external load capacitance tuning capability. The 2pF load capacitance difference (10pF versus 12pF) can be compensated through adjustment of external tuning capacitors. In fixed-load designs without tuning networks, circuit-level frequency verification is required to confirm operation within ±50ppm specification.

Q: What is the significance of the ESR difference between 60 Ohms and 50 Ohms?

A: ESR (Equivalent Series Resistance) affects oscillator startup behavior and power consumption. The LFXTAL059815REEL with 50 Ohms ESR provides improved startup characteristics compared to the 60 Ohms specification of the primary part. This represents a performance enhancement rather than a limitation.

Q: Are both parts physically compatible with the same PCB footprint?

A: Yes. Both the 7M-27.120MBGE-T and LFXTAL059815REEL use identical 4-SMD no-lead packaging with dimensions of 3.20mm x 2.50mm and maximum seated height of 0.80mm. PCB footprints designed for either part are interchangeable.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: ROHS3 Compliant represents the current RoHS 3 directive (2015/863/EU) which includes additional restricted substances beyond the original RoHS specification. ROHS3 compliance indicates the substitute part meets a more stringent regulatory standard and is fully compatible with applications requiring RoHS Compliant components.

Q: How does the load capacitance affect frequency accuracy?

A: Load capacitance is the capacitive load presented to the crystal by the oscillator circuit. The specified ±50ppm frequency stability applies when the crystal operates at its rated load capacitance. Deviation from rated load capacitance causes frequency shift. The primary part specifies 12pF load capacitance while the substitute specifies 10pF. Oscillator circuits typically include external tuning capacitors to adjust the effective load capacitance to the crystal's rated value.

Q: What inventory considerations apply to these parts?

A: The primary part (7M-27.120MBGE-T) has 801 pieces in stock. The substitute part (LFXTAL059815REEL) has 2064 pieces in stock, providing greater availability for high-volume applications or extended lead time protection.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the 7M-27.120MBGE-T and LFXTAL059815REEL are specified for -40°C to 85°C operating temperature range, making them suitable for identical industrial and commercial applications.

Q: What does Moisture Sensitivity Level (MSL) indicate?

A: MSL indicates the component's sensitivity to moisture absorption during storage and handling. The primary part specifies MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The substitute part lists MSL as Not Applicable, also indicating no moisture sensitivity constraints. Both parts can be stored and handled using standard component management practices.