AS-16.000MAHK-B Equivalent & Substitute Parts

Part Overview

The AS-16.000MAHK-B is a 16 MHz through-hole crystal oscillator manufactured by TXC CORPORATION, designed for fundamental mode operation with 20pF load capacitance and 50 Ohms equivalent series resistance (ESR). This component operates across the industrial temperature range of -40°C to 85°C and carries AEC-Q200 qualification. The part is classified as obsolete, making identification of functionally equivalent substitutes necessary for ongoing system support and component procurement.

Substiute Parts

AS-16.000MAHK-B

TXC CORPORATIONIn Stock: 804AS-16.000MAHK-B Datasheet

Current PartRFQ

9B-16.000MBBK-B

TXC CORPORATIONIn Stock: 8709B-16.000MBBK-B Datasheet

SimilarRFQ

AV-16.000MAHK-T

TXC CORPORATIONIn Stock: 1246AV-16.000MAHK-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AS-16.000MAHK-B is determined by the following critical parameters:

Primary Matching Criteria:

• Frequency: 16 MHz (exact match required)
• Load Capacitance: 20pF (exact match required)
• Operating Mode: Fundamental (exact match required)

Secondary Compatibility Factors:

• Frequency Stability: ±30ppm or tighter tolerance
• Operating Temperature Range: Must encompass or match -40°C to 85°C
• ESR: Acceptable within circuit design margins
• Mounting Type: Through-hole preferred for direct replacement; surface-mount alternatives require PCB redesign
• Package / Case: HC-49/US for through-hole; alternative packages require mechanical redesign

Compliance Considerations:

• RoHS compliance required for new designs
• AEC-Q200 qualification preferred for automotive and high-reliability applications

Two substitute parts meet the core frequency, load capacitance, and operating mode requirements. One maintains through-hole mounting compatibility; the other provides an active-status surface-mount alternative.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement (No PCB Redesign):

The 9B-16.000MBBK-B provides mechanical and electrical compatibility with identical mounting footprint (HC-49/US) and through-hole configuration. However, this substitute exhibits relaxed frequency stability (±50ppm versus ±30ppm) and a narrower operating temperature range (-20°C to 70°C versus -40°C to 85°C). Selection of this part is appropriate only when the application circuit tolerates ±50ppm frequency deviation and operates exclusively within the -20°C to 70°C temperature window. The part carries ROHS3 compliance but lacks AEC-Q200 qualification.

For Active-Status Replacement (PCB Redesign Required):

The AV-16.000MAHK-T is the only active-status substitute and maintains identical frequency stability (±30ppm) and full operating temperature range (-40°C to 85°C) with AEC-Q200 qualification. This part requires surface-mount PCB redesign due to its 4-SMD, No Lead package format. The higher ESR (120 Ohms versus 50 Ohms) must be evaluated against circuit oscillator design margins. This substitute is recommended for new designs and long-term component availability assurance.

Compliance Summary:

Both substitutes maintain RoHS compliance. The AV-16.000MAHK-T preserves AEC-Q200 qualification, matching the original part's automotive and high-reliability certification status.

Frequently Asked Questions (FAQ)

Q: Can the 9B-16.000MBBK-B be used as a direct replacement for the AS-16.000MAHK-B without circuit modification?

A: The 9B-16.000MBBK-B shares identical mechanical mounting (HC-49/US through-hole) and electrical frequency (16 MHz) with 20pF load capacitance. However, the relaxed frequency stability (±50ppm versus ±30ppm) and narrower temperature range (-20°C to 70°C versus -40°C to 85°C) require circuit validation. If the application was designed for ±30ppm stability and operates below -20°C or above 70°C, this substitute is not compatible without circuit redesign.

Q: What is the primary limitation of the 9B-16.000MBBK-B?

A: The operating temperature range of -20°C to 70°C is narrower than the original AS-16.000MAHK-B (-40°C to 85°C). Applications requiring full industrial temperature coverage cannot use this substitute. Additionally, frequency stability is degraded to ±50ppm, which may exceed acceptable deviation in precision timing applications.

Q: Why does the AV-16.000MAHK-T have higher ESR (120 Ohms) compared to the original part (50 Ohms)?

A: The AV-16.000MAHK-T is a surface-mount device (4-SMD, No Lead package) designed for modern PCB assembly processes. Surface-mount crystal designs inherently exhibit different electrical characteristics than through-hole HC-49/US packages. The higher ESR must be verified against the oscillator circuit's drive capability and frequency stability requirements during design validation.

Q: Is the AV-16.000MAHK-T suitable for applications requiring AEC-Q200 qualification?

A: Yes. The AV-16.000MAHK-T carries AEC-Q200 qualification, matching the original AS-16.000MAHK-B. This part is appropriate for automotive and high-reliability applications. However, PCB redesign is mandatory due to the surface-mount package format.

Q: What is the key advantage of selecting the AV-16.000MAHK-T over the 9B-16.000MBBK-B?

A: The AV-16.000MAHK-T maintains active product status, ensuring long-term availability and supply chain continuity. It preserves the original frequency stability (±30ppm) and full operating temperature range (-40°C to 85°C) with AEC-Q200 qualification. The 9B-16.000MBBK-B is obsolete with degraded specifications and limited future availability.

Q: Can both substitutes be used interchangeably in the same circuit?

A: No. The 9B-16.000MBBK-B and AV-16.000MAHK-T have different mounting types (through-hole versus surface-mount), different ESR values, and different temperature ranges. Selection depends on PCB design constraints, temperature requirements, and frequency stability margins. Each substitute requires independent circuit validation.