SA25424CF35HAR Equivalent & Substitute Parts

Part Overview

The SA25424CF35HAR is a 24.576 MHz fundamental mode crystal oscillator manufactured by CTS-Frequency Controls, designed for surface mount applications requiring precise frequency control. This Active product is rated to AEC-Q200 automotive standards and operates across the industrial temperature range of -40°C to 125°C. The crystal is specified with 10pF load capacitance, 80 Ohms equivalent series resistance (ESR), and ±30ppm frequency tolerance. Substitute parts are identified to address inventory availability, alternative packaging formats, or specific ESR requirements while maintaining electrical and mechanical compatibility within the defined parameter specifications.

Key Parameters

Parameter	Value	Unit
Frequency	24.576	MHz
Frequency Tolerance	±30	ppm
Load Capacitance	10	pF
Operating Mode	Fundamental
Operating Temperature Range	-40 to 125	°C
Package Type	4-SMD, No Lead
Mounting Type	Surface Mount
AEC-Q200 Rating	Yes
RoHS3 Compliance	Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SA25424CF35HAR is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

Frequency: 24.576 MHz (exact match required)
Frequency Tolerance: ±30ppm (exact match required)
Load Capacitance: 10pF (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature Range: -40°C to 125°C (exact match required)
Package Type: 4-SMD, No Lead (exact match required)
Mounting Type: Surface Mount (exact match required)
AEC-Q200 Rating: Required
RoHS3 Compliance: Required

Variable Parameters (Substitution Allowed):

ESR (Equivalent Series Resistance): 60 to 150 Ohms
Physical Dimensions: Variations permitted within SMD form factor constraints
Packaging Format: Tape & Reel (TR) or Cut Tape (CT)
Manufacturer: CTS-Frequency Controls, Abracon LLC, ECS Inc., ILSI

All identified substitute parts meet the mandatory parameter requirements and are therefore electrically and mechanically compatible with the SA25424CF35HAR in applications where the specified load capacitance and frequency tolerance are required.

Parameter Comparison

Part Number	Manufacturer	Frequency (MHz)	Frequency Tolerance (ppm)	Load Capacitance (pF)	ESR (Ohms)	Operating Temperature (°C)	Package	Packaging Format	AEC-Q200	RoHS3
SA25424CF35HAR	CTS-Frequency Controls	24.576	±30	10	80	-40 to 125	4-SMD, No Lead	Tape & Reel (TR)	Yes	Compliant
ABM11AIG-24.576MHZ-4Z-T3	Abracon LLC	24.576	±30	10	100	-40 to 125	4-SMD, No Lead	Tape & Reel (TR)	Yes	Compliant
ECS-245.7-10-36Q-ES-TR	ECS Inc.	24.576	±30	10	60	-40 to 125	4-SMD, No Lead	Tape & Reel (TR)	Yes	Compliant
ECS-245.7-10-37Q-ES-TR	ECS Inc.	24.576	±30	10	100	-40 to 125	4-SMD, No Lead	Cut Tape (CT)	Yes	Compliant
IXA12-FBFF10-24.576 MHZ	ILSI	24.576	±30	10	120	-40 to 125	4-SMD, No Lead	Tape & Reel (TR)	Yes	Compliant
IXA10-FBFF10-24.576 MHZ	ILSI	24.576	±30	10	150	-40 to 125	4-SMD, No Lead	Cut Tape (CT)	Yes	Compliant

Engineering Selection Recommendations

All substitute parts listed are Active products with AEC-Q200 automotive qualification and RoHS3 compliance, matching the regulatory and quality standards of the SA25424CF35HAR. Selection among substitute parts should be based on the following criteria:

ESR Considerations: The SA25424CF35HAR specifies 80 Ohms ESR. Substitute parts range from 60 to 150 Ohms ESR. Lower ESR values (ECS-245.7-10-36Q-ES-TR at 60 Ohms) reduce power consumption and improve frequency stability margin. Higher ESR values (IXA10-FBFF10-24.576 MHZ at 150 Ohms) increase power consumption but may be acceptable in applications with adequate drive capability. The 100 Ohms ESR variants (ABM11AIG-24.576MHZ-4Z-T3 and ECS-245.7-10-37Q-ES-TR) provide closest electrical equivalence to the original specification.

Packaging Format: Tape & Reel (TR) format is preferred for high-volume automated assembly. Cut Tape (CT) format is suitable for lower-volume or manual assembly operations. The SA25424CF35HAR is supplied in TR format; ECS-245.7-10-37Q-ES-TR and IXA10-FBFF10-24.576 MHZ are supplied in CT format.

Physical Dimensions: Substitute parts exhibit variations in physical dimensions while maintaining 4-SMD, No Lead package type. The SA25424CF35HAR measures 2.50mm × 2.00mm × 0.65mm (max height). Smaller alternatives such as ABM11AIG-24.576MHZ-4Z-T3 (2.00mm × 1.60mm × 0.55mm) and IXA10-FBFF10-24.576 MHZ (1.60mm × 1.20mm × 0.40mm) provide space optimization benefits in compact PCB layouts.

Inventory Availability: All substitute parts are confirmed in stock with quantities ranging from 2,329 to 3,703 pieces, providing supply chain flexibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SA25424CF35HAR with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts maintain identical frequency (24.576 MHz), frequency tolerance (±30ppm), load capacitance (10pF), operating temperature range (-40°C to 125°C), and package type (4-SMD, No Lead). These parameters define electrical and mechanical compatibility. ESR variations between 60 and 150 Ohms are within acceptable operating ranges for standard crystal oscillator circuits designed for 10pF load capacitance.

Q: What is the impact of ESR differences on circuit performance?

A: ESR affects power consumption and frequency stability margin. Lower ESR (60 Ohms) reduces power draw and improves stability. Higher ESR (150 Ohms) increases power consumption but remains compatible with standard oscillator driver circuits. The original SA25424CF35HAR at 80 Ohms ESR is positioned in the mid-range. Selection should align with the oscillator circuit's drive capability specifications.

Q: Are there physical size constraints I should consider when substituting?

A: Yes. While all parts use 4-SMD, No Lead packaging, physical dimensions vary. The SA25424CF35HAR measures 2.50mm × 2.00mm. Smaller alternatives (IXA10-FBFF10-24.576 MHZ at 1.60mm × 1.20mm) offer PCB space savings. Larger alternatives maintain the original footprint. Verify PCB layout compatibility before selection.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) format is supplied on continuous carrier tape suitable for automated pick-and-place assembly equipment. Cut Tape (CT) format is supplied as individual segments, suitable for manual assembly or lower-volume production. Both formats contain identical components; packaging format selection depends on assembly process requirements.

Q: Do all substitute parts meet automotive qualification standards?

A: Yes. All substitute parts carry AEC-Q200 automotive qualification and RoHS3 compliance, matching the regulatory requirements of the SA25424CF35HAR. This ensures suitability for automotive and industrial applications requiring equivalent quality and reliability standards.

Q: Can I mix substitute parts from different manufacturers in the same production run?

A: Yes. All substitute parts meet identical electrical specifications (frequency, tolerance, load capacitance, temperature range) and package requirements. Mixing manufacturers is permissible from an electrical compatibility standpoint. However, manufacturing process variations may introduce minor performance differences; verify with your oscillator circuit designer if consistency across the production run is critical.

Q: What is the Moisture Sensitivity Level (MSL) significance?

A: The SA25424CF35HAR and most substitute parts specify MSL 1 (Unlimited), indicating no moisture sensitivity constraints. This eliminates bake-out requirements and simplifies storage and handling procedures. The ABM11AIG-24.576MHZ-4Z-T3 specifies MSL as Not Applicable, also indicating no moisture sensitivity. Both conditions are equivalent for practical purposes.

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