AS-16.9344MAHH-B Equivalent & Substitute Parts

Part Overview

The AS-16.9344MAHH-B is a 16.9344 MHz through-hole crystal oscillator manufactured by TXC CORPORATION. This component operates at a fundamental frequency with 15pF load capacitance and 50 Ohms equivalent series resistance, housed in an HC-49/US package. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

AS-16.9344MAHH-B

TXC CORPORATIONIn Stock: 1187AS-16.9344MAHH-B Datasheet

Current PartRFQ

AX-16.9344MCGH-T

TXC CORPORATIONIn Stock: 1118AX-16.9344MCGH-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AS-16.9344MAHH-B is constrained by the following critical parameters:

Mandatory Match Parameters:

• Frequency: 16.9344 MHz (exact match required)
• Load Capacitance: 15pF (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
• AEC-Q200 Compliance: Required for automotive applications

Allowable Variation Parameters:

• Frequency Stability: Substitute may have wider tolerance (±50ppm or ±100ppm) if application circuit design accommodates
• ESR: Substitute may have higher ESR (80 Ohms vs. 50 Ohms) if circuit design supports increased resistance
• Mounting Type: May differ (through-hole to surface-mount) only if PCB redesign is acceptable
• Package Type: May differ if physical space and assembly process allow

The identified substitute AX-16.9344MCGH-T maintains the critical frequency and load capacitance parameters while offering an active product status alternative. However, mounting type differs fundamentally (surface-mount vs. through-hole), requiring PCB-level design changes.

Parameter Comparison

Engineering Selection Recommendations

For Direct Electrical Substitution (Same PCB Layout):

The AS-16.9344MAHH-B cannot be directly replaced on existing through-hole PCB layouts without physical redesign. No through-hole equivalent with identical specifications is provided in the substitute list.

For New Design or PCB Redesign:

The AX-16.9344MCGH-T is suitable as a functional equivalent when the following conditions are met:

1. PCB layout is modified to accommodate surface-mount 2-SMD, No Lead package
2. Circuit design tolerates ±100ppm frequency tolerance (vs. ±30ppm original)
3. Circuit design accommodates 80 Ohms ESR (vs. 50 Ohms original)
4. Assembly process supports surface-mount technology
5. Active product status ensures long-term availability and supply chain continuity

Both parts maintain AEC-Q200 automotive qualification and RoHS compliance, supporting regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the AX-16.9344MCGH-T be used as a drop-in replacement for the AS-16.9344MAHH-B?

A: No. The AX-16.9344MCGH-T uses surface-mount technology (2-SMD, No Lead package) while the AS-16.9344MAHH-B uses through-hole technology (HC-49/US package). PCB redesign is required for physical mounting compatibility.

Q: What are the critical parameters that must match between these parts?

A: Frequency (16.9344 MHz) and load capacitance (15pF) must match exactly. Operating temperature range (-40°C ~ 85°C) and AEC-Q200 compliance must be maintained. These parameters determine circuit timing and oscillation characteristics.

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

A: The AX-16.9344MCGH-T has 80 Ohms ESR compared to 50 Ohms for the AS-16.9344MAHH-B. Circuit design must accommodate this difference. Higher ESR may affect startup time and oscillation amplitude. Circuit simulation or testing is necessary to confirm compatibility with specific application requirements.

Q: Is the wider frequency tolerance of the substitute part acceptable?

A: The AX-16.9344MCGH-T has ±100ppm frequency tolerance compared to ±30ppm for the AS-16.9344MAHH-B. Application requirements determine acceptability. If the circuit design margin accommodates ±100ppm variation, the substitute is suitable. If tighter tolerance is required, alternative parts must be evaluated.

Q: Are both parts compliant with automotive standards?

A: Yes. Both the AS-16.9344MAHH-B and AX-16.9344MCGH-T carry AEC-Q200 ratings and are RoHS compliant, meeting automotive qualification and environmental requirements.

Q: What is the inventory status of these parts?

A: The AS-16.9344MAHH-B is obsolete with 1101 pieces in stock. The AX-16.9344MCGH-T is active with 1058 pieces in stock, ensuring ongoing availability for new production.