AB-12.000MAME-T Equivalent & Substitute Parts

Part Overview

The AB-12.000MAME-T is a 12 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION, designed for surface mount applications requiring precise frequency control. This active product features a 12 pF load capacitance, 80 Ohms equivalent series resistance (ESR), and operates across the industrial temperature range of -40°C to 125°C. The component is packaged in a 4-SMD, No Lead configuration with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified to address inventory availability, packaging format preferences, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

AB-12.000MAME-T

TXC CORPORATIONIn Stock: 1237AB-12.000MAME-T Datasheet

Current PartRFQ

FC5BACAGI12.0-T1

Fox ElectronicsIn Stock: 1956FC5BACAGI12.0-T1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AB-12.000MAME-T is determined by strict alignment of the following parameters:

Mandatory Matching Parameters:

• Frequency: 12 MHz (exact match required)
• Frequency Tolerance: ±30 ppm (exact match required)
• Load Capacitance: 12 pF (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• Size / Dimension: 5.00 mm × 3.20 mm (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -40°C to 125°C (minimum requirement)

Allowable Variation Parameters:

• ESR (Equivalent Series Resistance): 80–90 Ohms (within acceptable tolerance for circuit operation)
• Height - Seated (Max): Variation acceptable within SMD assembly constraints
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® (logistics variation, not electrical)

The FC5BACAGI12.0-T1 from Fox Electronics qualifies as a direct substitute based on matching all mandatory parameters and operating within the allowable ESR variation range.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: AB-12.000MAME-T

The AB-12.000MAME-T remains the preferred selection when available. It is an active product with full AEC-Q200 automotive qualification, RoHS compliance, and unlimited moisture sensitivity rating. Current inventory of 1,145 pieces supports immediate procurement.

Substitute Part: FC5BACAGI12.0-T1

The FC5BACAGI12.0-T1 from Fox Electronics is a qualified substitute when the primary part is unavailable. This part meets all mandatory electrical and mechanical parameters:

• Identical frequency (12 MHz) and frequency tolerance (±30 ppm)
• Matching load capacitance (12 pF) and package configuration (4-SMD, No Lead)
• Identical operating temperature range (-40°C to 125°C)
• ESR of 90 Ohms is within acceptable tolerance for 12 MHz crystal circuits (10 Ohm variation from primary part)
• Full AEC-Q200 qualification and ROHS3 compliance
• Lower profile (1.00 mm vs. 1.05 mm) provides additional PCB assembly margin
• Higher inventory availability (1,874 pieces) supports supply chain continuity

Both parts are suitable for direct substitution in applications requiring 12 MHz timing with 12 pF load capacitance and industrial temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the FC5BACAGI12.0-T1 be used as a direct replacement for the AB-12.000MAME-T on the same PCB?

A: Yes. Both parts share identical frequency (12 MHz), frequency tolerance (±30 ppm), load capacitance (12 pF), package type (4-SMD, No Lead), and physical dimensions (5.00 mm × 3.20 mm). The ESR difference (90 Ohms vs. 80 Ohms) is within acceptable tolerance for 12 MHz crystal oscillator circuits. No PCB redesign is required.

Q: What is the significance of the 10 Ohm ESR difference between these parts?

A: ESR affects crystal startup time and circuit stability. The 10 Ohm difference (80 Ohms to 90 Ohms) represents a 12.5% increase. For 12 MHz fundamental mode crystals, this variation remains within the acceptable operating range for standard oscillator circuits. Circuit simulation or testing is not required for this substitution.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the AB-12.000MAME-T and FC5BACAGI12.0-T1 carry AEC-Q200 qualification, indicating compliance with automotive reliability and quality standards.

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

A: Tape & Reel and Cut Tape & Digi-Reel® are logistics and assembly format variations. Both formats contain identical components. Tape & Reel is standard for high-volume automated assembly. Cut Tape & Digi-Reel® provides flexibility for lower-volume or mixed-component orders. Selection depends on assembly process requirements, not electrical performance.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply.

Q: Is the lower profile of the Fox Electronics part (1.00 mm vs. 1.05 mm) a concern?

A: No. The 0.05 mm height difference is negligible for SMD assembly. The lower profile of the Fox part provides additional clearance margin for PCB assembly and component placement.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both parts meet identical electrical specifications and AEC-Q200 qualification. Mixed sourcing is acceptable for applications where component traceability is not a requirement. Verify with your quality and procurement procedures for any specific supplier or part number tracking requirements.