14.7456 MHz Crystal 4P147F35CST Equivalent & Substitute Parts

Part Overview

The 4P147F35CST is a 14.7456 MHz surface mount crystal manufactured by CTS-Frequency Controls in the ATSSM4P series. This component operates at a fundamental frequency with ±30ppm tolerance and 40 Ohms equivalent series resistance in an HC-49/US package. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications requiring this specific frequency and electrical characteristics.

Substiute Parts

4P147F35CST

CTS-Frequency ControlsIn Stock: 7604P147F35CST Datasheet

Current PartRFQ

ATS147SM-1

CTS-Frequency ControlsIn Stock: 1047ATS147SM-1 Datasheet

SimilarRFQ

ECS-147.4-S-28AX-TR

ECS Inc.In Stock: 891ECS-147.4-S-28AX-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 4P147F35CST is determined by strict equivalence across the following critical parameters:

• Frequency: 14.7456 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• ESR: 40 Ohms (exact match required)
• Package / Case: HC-49/US (exact match required)
• Operating Mode: Fundamental (exact match required)
• Load Capacitance: Series (exact match required)
• Mounting Type: Surface Mount (exact match required)

Substitute parts must maintain identical electrical performance and physical compatibility. Variations in operating temperature range, dimensions within tolerance, and product status (active vs. obsolete) do not disqualify substitution when all primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Both ATS147SM-1 and ECS-147.4-S-28AX-TR are direct electrical equivalents to the obsolete 4P147F35CST, meeting all critical frequency, tolerance, and impedance specifications.

ATS147SM-1 is manufactured by CTS-Frequency Controls, the original manufacturer of the 4P147F35CST, and maintains the identical operating temperature range of -20°C ~ 70°C. This part carries active product status with ROHS3 compliance and REACH unaffected certification.

ECS-147.4-S-28AX-TR is manufactured by ECS Inc. and provides equivalent electrical performance with a narrower operating temperature range of -10°C ~ 70°C. This part also carries active product status with ROHS3 compliance and REACH unaffected certification.

Selection between these substitutes should be based on supply chain availability, packaging requirements (both available in Tape & Reel format), and temperature range requirements specific to the application. The -20°C lower temperature limit of the ATS147SM-1 provides broader environmental coverage compared to the ECS-147.4-S-28AX-TR.

Frequently Asked Questions (FAQ)

Q: Can ATS147SM-1 or ECS-147.4-S-28AX-TR be used as direct replacements for 4P147F35CST?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical frequency (14.7456 MHz), tolerance (±30ppm), ESR (40 Ohms), load capacitance (Series), operating mode (Fundamental), and HC-49/US package specifications.

Q: What is the difference between the two substitute parts?

A: The primary differences are manufacturer (CTS-Frequency Controls vs. ECS Inc.), operating temperature range (ATS147SM-1 extends to -20°C minimum vs. -10°C for ECS-147.4-S-28AX-TR), and physical dimensions within the HC-49/US envelope. Electrical performance is identical.

Q: Does the operating temperature range difference affect substitution?

A: The operating temperature range difference does not prevent substitution. Selection depends on application requirements. If the circuit operates below -10°C, ATS147SM-1 is required. For applications within -10°C to 70°C, both parts are suitable.

Q: Are both substitute parts RoHS and REACH compliant?

A: Yes. Both ATS147SM-1 and ECS-147.4-S-28AX-TR are ROHS3 compliant and REACH unaffected.

Q: What packaging options are available for the substitute parts?

A: Both substitute parts are available in Tape & Reel (TR) packaging format, suitable for automated assembly processes.

Q: Is there a frequency tolerance difference between the main part and substitutes?

A: No. All three parts maintain ±30ppm frequency tolerance and ±50ppm frequency stability, ensuring identical performance in frequency-critical applications.