TC-49.152MBD-T Equivalent & Substitute Parts

Part Overview

The TC-49.152MBD-T is a 49.152 MHz XO (Standard) CMOS oscillator manufactured by TXC CORPORATION. This MEMS-based oscillator operates at 3.3V with Enable/Disable functionality in a 4-SMD, No Lead package. The part is currently listed as Obsolete, making identification of equivalent and substitute components essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

TC-49.152MBD-T

TXC CORPORATIONIn Stock: 1131TC-49.152MBD-T Datasheet

Current PartRFQ

7X-49.152MBD-T

TXC CORPORATIONIn Stock: 8397X-49.152MBD-T Datasheet

DirectRFQ

DSC1001CI2-049.1520

Microchip TechnologyIn Stock: 1711DSC1001CI2-049.1520 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-49.152MBD-T is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 49.152 MHz (exact match required)
• Output Type: CMOS
• Function: Enable/Disable capability
• Operating Temperature Range: -40°C ~ 85°C (minimum)
• Frequency Stability: ±25ppm (or better)
• Moisture Sensitivity Level: MSL 1 or better
• Physical Dimensions: 3.20mm x 2.50mm (footprint compatibility)

Allowable Variations:

• Base Resonator Type: MEMS or Crystal (both acceptable for functional equivalence)
• Supply Voltage: 3.3V fixed or 1.8V ~ 3.3V range (backward compatible)
• Package Designation: 4-SMD No Lead or 4-VDFN (same footprint, different construction)
• Current Consumption: May vary within acceptable operating limits
• Product Status: Active preferred over Obsolete for long-term availability

Two substitute parts meet these criteria and are grouped as follows:

Direct Substitute (Same Manufacturer): 7X-49.152MBD-T (TXC CORPORATION) — Crystal-based resonator variant with Active product status.

Cross-Manufacturer Substitute: DSC1001CI2-049.1520 (Microchip Technology) — MEMS-based oscillator with extended voltage range and Active product status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Manufacturer Preference):

The 7X-49.152MBD-T is the primary substitute when maintaining TXC CORPORATION component lineage is required. This part is Active status, ensuring long-term availability and manufacturing support. The crystal-based resonator provides equivalent frequency stability (±25ppm) and identical electrical performance at 3.3V. The 1.10mm seated height represents a minor increase from the original 0.80mm; verify PCB clearance in height-constrained applications. Current consumption is reduced to 15mA (versus 25mA), providing improved power efficiency. RoHS Compliance certification confirms environmental regulatory alignment.

For Cross-Manufacturer Substitution (Enhanced Performance):

The DSC1001CI2-049.1520 (Microchip Technology) offers superior technical characteristics while maintaining full functional compatibility. Active product status guarantees extended availability. The extended supply voltage range (1.8V ~ 3.3V) provides design flexibility for multi-voltage systems. Current consumption is significantly reduced to 7.2mA maximum, with 15µA disable current, enabling low-power applications. The 4-VDFN package maintains identical footprint dimensions (3.20mm x 2.50mm) with 0.90mm seated height. AEC-Q100 automotive qualification and ROHS3 compliance indicate highest reliability standards. This part is recommended for new designs and applications requiring enhanced power efficiency.

Critical Compatibility Factors:

All three parts share identical frequency (49.152 MHz), CMOS output, Enable/Disable function, ±25ppm stability, and MSL 1 rating. Footprint compatibility is confirmed across all substitutes. Supply voltage at 3.3V is supported by all parts. Operating temperature range (-40°C ~ 85°C) is identical. Physical dimensions (3.20mm x 2.50mm) ensure PCB layout compatibility. Height variations (0.80mm to 1.10mm) require clearance verification in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the 7X-49.152MBD-T directly replace the TC-49.152MBD-T without PCB modifications?

A: Yes. Both parts share identical frequency (49.152 MHz), CMOS output, 3.3V supply, Enable/Disable function, and footprint dimensions (3.20mm x 2.50mm). The primary difference is resonator type (Crystal versus MEMS) and seated height (1.10mm versus 0.80mm). Verify PCB clearance for the increased height. No electrical modifications are required.

Q: What is the advantage of the DSC1001CI2-049.1520 over the TXC alternatives?

A: The DSC1001CI2-049.1520 provides three key advantages: (1) Extended supply voltage range (1.8V ~ 3.3V) enables operation in lower-voltage systems; (2) Significantly reduced current consumption (7.2mA maximum, 15µA disable) improves power efficiency; (3) AEC-Q100 automotive qualification and ROHS3 compliance meet highest reliability standards. Footprint and frequency remain identical.

Q: Are there any package compatibility concerns between 4-SMD No Lead and 4-VDFN?

A: Both packages maintain identical footprint dimensions (3.20mm x 2.50mm) and are surface-mount compatible. The 4-VDFN package (DSC1001CI2-049.1520) has a slightly lower seated height (0.90mm) compared to 4-SMD No Lead variants. Verify PCB design files support the specific package type; most modern PCB design tools accommodate both package styles for this footprint.

Q: Is the TC-49.152MBD-T still available for purchase?

A: The TC-49.152MBD-T is listed as Obsolete. The 7X-49.152MBD-T (TXC CORPORATION, Active) and DSC1001CI2-049.1520 (Microchip Technology, Active) are recommended for new orders and ongoing production. Both substitutes are in active manufacturing and widely available through authorized distributors.

Q: What is the frequency stability specification, and does it apply to all three parts?

A: All three parts specify ±25ppm frequency stability across the -40°C ~ 85°C operating temperature range. This specification is identical and meets standard industrial oscillator performance requirements. Frequency stability is a critical matching parameter for substitution eligibility.

Q: Can the DSC1001CI2-049.1520 operate at voltages below 3.3V?

A: Yes. The DSC1001CI2-049.1520 supports supply voltages from 1.8V to 3.3V. The TC-49.152MBD-T and 7X-49.152MBD-T are fixed at 3.3V. If your application requires operation below 3.3V, the DSC1001CI2-049.1520 is the only suitable option among these three parts.

Q: What is the Moisture Sensitivity Level (MSL) rating, and why does it matter?

A: All three parts are rated MSL 1 (Unlimited), indicating they have unlimited shelf life and require no special moisture control during storage or handling. This is the most favorable MSL rating and ensures no additional manufacturing process constraints.

Q: Are there RoHS compliance differences between the substitutes?

A: The 7X-49.152MBD-T is RoHS Compliant. The DSC1001CI2-049.1520 is ROHS3 Compliant (the latest RoHS directive revision). Both meet current environmental regulations. The TC-49.152MBD-T does not specify RoHS status. For new designs, either substitute ensures regulatory compliance.