7M-40.000MAHV-T Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The 7M-40.000MAHV-T is a 40 MHz surface mount crystal oscillator manufactured by TXC CORPORATION. This fundamental mode crystal operates across the industrial temperature range of -40°C to 85°C with a frequency stability of ±30ppm and load capacitance of 8pF. The component is packaged in a 4-SMD, No Lead configuration with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). This part is currently in active production status with 2637 units available in inventory.

Alternative equivalent parts are necessary when the primary part experiences supply constraints, when packaging format requirements differ, or when specific electrical parameters such as ESR (Equivalent Series Resistance) must be optimized for particular circuit applications.

Substiute Parts

7M-40.000MAHV-T

TXC CORPORATIONIn Stock: 27457M-40.000MAHV-T Datasheet

Current PartRFQ

XZAEELNANF-40.000000

TaitienIn Stock: 1584XZAEELNANF-40.000000 Datasheet

SimilarRFQ

XZLEELNANF-40.000000

TaitienIn Stock: 1599XZLEELNANF-40.000000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7M-40.000MAHV-T is determined by the following critical parameters:

Primary Matching Criteria:

• Frequency: 40.000 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -40°C to 85°C (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

• Load Capacitance: 8pF or 6pF (within acceptable circuit design tolerance)
• ESR: 60 Ohms to 80 Ohms (affects circuit Q-factor and startup characteristics)
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) (affects procurement and assembly)
• RoHS Compliance: RoHS Compliant or ROHS3 Compliant (regulatory requirement)
• MSL Rating: 1 (Unlimited) (storage and handling requirement)

The identified substitute parts meet all primary matching criteria. Variations in load capacitance and ESR represent acceptable engineering trade-offs within standard crystal oscillator circuit design margins.

Parameter Comparison

Engineering Selection Recommendations

7M-40.000MAHV-T (Primary Part)

The TXC CORPORATION 7M-40.000MAHV-T remains the primary selection when available. This part carries RoHS compliance certification and maintains active production status with substantial inventory availability (2637 units). The 60 Ohm ESR specification provides optimal circuit performance characteristics for standard 40 MHz oscillator applications. The larger physical footprint (3.20mm x 2.50mm) accommodates standard PCB assembly processes without space constraints.

XZAEELNANF-40.000000 (Taitien - 8pF Load Capacitance)

The Taitien XZAEELNANF-40.000000 serves as a direct electrical equivalent with matching 8pF load capacitance. This substitute maintains identical frequency, stability, and temperature specifications. The 80 Ohm ESR represents a 33% increase from the primary part, which remains within acceptable operating margins for most circuit designs. The reduced physical dimensions (2.05mm x 1.65mm) and lower profile (0.55mm) enable space-constrained PCB layouts. ROHS3 compliance and unlimited MSL rating satisfy regulatory and storage requirements. This part is available in Cut Tape (CT) packaging format.

XZLEELNANF-40.000000 (Taitien - 6pF Load Capacitance)

The Taitien XZLEELNANF-40.000000 provides functional equivalence with a 6pF load capacitance specification. This represents a 25% reduction from the primary part's 8pF rating. The 80 Ohm ESR and all other electrical parameters remain consistent with the XZAEELNANF-40.000000 variant. Physical dimensions and compliance certifications are identical. Selection of this variant requires circuit design verification to confirm that the reduced load capacitance does not introduce frequency pulling or stability degradation in the target application.

Selection Criteria Summary:

• Use 7M-40.000MAHV-T when supply availability permits and standard PCB footprint space is available
• Use XZAEELNANF-40.000000 when space constraints require compact dimensions and 8pF load capacitance is required
• Use XZLEELNANF-40.000000 only when circuit design has been verified to operate with 6pF load capacitance

All three parts maintain active production status, RoHS/ROHS3 compliance, and unlimited moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can XZAEELNANF-40.000000 be used as a direct replacement for 7M-40.000MAHV-T?

A: Yes. Both parts operate at 40.000 MHz with ±30ppm stability across -40°C to 85°C. The primary difference is ESR: 60 Ohms (TXC) versus 80 Ohms (Taitien). This 20 Ohm increase does not prevent functional substitution in standard applications. Physical dimensions differ (3.20mm x 2.50mm versus 2.05mm x 1.65mm), requiring PCB layout verification.

Q: What is the significance of the load capacitance difference between 8pF and 6pF?

A: Load capacitance determines the frequency at which the crystal oscillates when connected to a specific circuit. The 7M-40.000MAHV-T and XZAEELNANF-40.000000 both specify 8pF load capacitance. The XZLEELNANF-40.000000 specifies 6pF. If your circuit is designed for 8pF load capacitance, using a 6pF crystal may result in frequency pulling or instability. Circuit design verification is required before substituting with the 6pF variant.

Q: Why does ESR differ between the TXC and Taitien parts?

A: ESR (Equivalent Series Resistance) is an inherent characteristic of crystal manufacturing and design. The TXC part specifies 60 Ohms while Taitien parts specify 80 Ohms. Both values are within standard industrial ranges. Higher ESR increases power consumption and may affect startup behavior in low-power circuits, but does not prevent functional operation in most applications.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel (TR) packaging supplies components on continuous reels suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on tape segments suitable for lower-volume or manual assembly. Both formats contain identical components; packaging format selection depends on assembly process requirements and order quantities.

Q: Are all three parts RoHS compliant?

A: Yes. The 7M-40.000MAHV-T carries RoHS Compliant certification. The XZAEELNANF-40.000000 and XZLEELNANF-40.000000 carry ROHS3 Compliant certification. Both certifications satisfy RoHS regulatory requirements. ROHS3 represents the current revision of the RoHS standard.

Q: Can I use these parts interchangeably in my design?

A: Interchangeability depends on your specific circuit design. All three parts match on frequency (40.000 MHz), stability (±30ppm), temperature range (-40°C to 85°C), and package type (4-SMD, No Lead). Before substitution, verify: (1) load capacitance compatibility (8pF or 6pF), (2) ESR tolerance in your circuit, and (3) physical footprint constraints on your PCB.

Q: What is MSL 1 (Unlimited) rating?

A: MSL (Moisture Sensitivity Level) 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All three parts carry MSL 1 rating, eliminating moisture-related storage constraints.