Equivalent & Substitute Parts for TXC 7B12000013 12 MHz Crystal

Part Overview

The TXC 7B12000013 is a 12 MHz fundamental mode crystal oscillator in 4-SMD surface mount package with 16pF load capacitance and 40 Ohms equivalent series resistance. This part is classified as obsolete, making substitute components necessary for ongoing production and maintenance applications. The specified electrical and mechanical parameters define the scope of compatible alternatives.

Substiute Parts

7B12000013

TXC CORPORATIONIn Stock: 11897B12000013 Datasheet

Current PartRFQ

ABM8-12.000MHZ-12-B1U-T

Abracon LLCIn Stock: 2227ABM8-12.000MHZ-12-B1U-T Datasheet

SimilarRFQ

ABM8-12.000MHZ-20-B1U-T

Abracon LLCIn Stock: 3841ABM8-12.000MHZ-20-B1U-T Datasheet

SimilarRFQ

ECS-120-20-33-CKM-TR

ECS Inc.In Stock: 51499ECS-120-20-33-CKM-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TXC 7B12000013 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 12 MHz (exact match required)
• Frequency Stability: ±10 ppm (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -20°C to 70°C (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)

Allowable Variation Parameters:

• Load Capacitance: 12 pF to 20 pF (circuit design determines acceptable range)
• ESR (Equivalent Series Resistance): 40 to 120 Ohms (circuit design determines acceptable range)
• Physical Dimensions: Smaller or equal dimensions acceptable for PCB layout compatibility
• RoHS Status: ROHS3 Compliant acceptable as equivalent to RoHS Compliant
• MSL Rating: Not Applicable acceptable as equivalent to MSL 1

The three substitute parts listed below satisfy all mandatory matching parameters and fall within allowable variation ranges for load capacitance and ESR.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The TXC 7B12000013 is classified as obsolete. All three substitute parts are active products with current manufacturing support and availability.

Compliance and Certification: All substitute parts meet ROHS3 compliance, which is equivalent to or exceeds the RoHS Compliant status of the original part. All parts carry EAR99 ECCN classification and 8541.60.0050 HTSUS code, consistent with the original part.

Load Capacitance and ESR Variations: The substitute parts exhibit higher ESR values (100-120 Ohms versus 40 Ohms) and load capacitance variations (12 pF or 20 pF versus 16 pF). These variations fall within acceptable ranges for 12 MHz crystal applications. Circuit design parameters determine whether the specific load capacitance and ESR of each substitute are compatible with the target application.

Physical Dimensions: All substitute parts feature smaller physical dimensions (3.20 x 2.50 mm versus 5.00 x 3.20 mm) and lower seated height (0.80 mm versus 1.05 mm). These dimensional reductions provide improved PCB layout flexibility and are compatible with standard SMD assembly processes.

Inventory Availability: ECS-120-20-33-CKM-TR offers the highest inventory level (51,444 pcs), followed by ABM8-12.000MHZ-20-B1U-T (3,752 pcs) and ABM8-12.000MHZ-12-B1U-T (2,174 pcs).

Frequently Asked Questions (FAQ)

Q: Can the ABM8-12.000MHZ-12-B1U-T substitute for the TXC 7B12000013 in all applications?

A: The ABM8-12.000MHZ-12-B1U-T matches all mandatory electrical parameters (frequency, stability, operating mode, temperature range). However, the 12 pF load capacitance differs from the original 16 pF specification. Circuit design determines compatibility. The higher ESR (120 Ohms versus 40 Ohms) may affect oscillator startup characteristics in some designs.

Q: What is the significance of the load capacitance difference between the original part and substitutes?

A: Load capacitance affects the oscillation frequency and circuit tuning. The original part specifies 16 pF, while substitutes offer 12 pF or 20 pF. The application circuit design determines the acceptable load capacitance range. Load capacitance mismatch may require circuit tuning adjustments or capacitor value modifications.

Q: Are the smaller physical dimensions of the substitute parts compatible with existing PCB layouts?

A: The substitute parts are physically smaller (3.20 x 2.50 mm versus 5.00 x 3.20 mm). Existing PCB footprints designed for the larger TXC part may require modification. However, the smaller size provides layout flexibility for new designs and may reduce PCB area requirements.

Q: Does the higher ESR of the substitute parts affect circuit performance?

A: ESR (Equivalent Series Resistance) influences oscillator startup time and power consumption. The substitutes exhibit 100-120 Ohms ESR compared to 40 Ohms for the original part. Circuit design determines whether this variation is acceptable. Applications with tight startup specifications or low-power requirements may require circuit analysis.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts carry ROHS3 Compliant certification, which meets or exceeds the RoHS Compliant status of the original TXC 7B12000013.

Q: What is the difference between the two Abracon ABM8 variants?

A: Both ABM8-12.000MHZ-12-B1U-T and ABM8-12.000MHZ-20-B1U-T are identical except for load capacitance: 12 pF versus 20 pF. Selection depends on circuit design requirements. The 20 pF variant (ABM8-12.000MHZ-20-B1U-T) offers higher inventory availability.

Q: Can the ECS-120-20-33-CKM-TR be used as a direct replacement?

A: The ECS-120-20-33-CKM-TR matches all mandatory electrical parameters and offers the highest inventory availability. The 20 pF load capacitance and 100 Ohms ESR fall within acceptable variation ranges. Circuit design determines final compatibility.