9C16000285 Crystal 16.0000MHz Equivalent & Substitute Parts

Part Overview

The 9C16000285 is a 16 MHz surface mount crystal manufactured by TXC CORPORATION in the HC-49/US package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The crystal operates at 16 MHz with ±30ppm frequency tolerance and 16pF load capacitance, designed for fundamental mode oscillation in timing and frequency control circuits.

Substiute Parts

9C16000285

TXC CORPORATIONIn Stock: 10769C16000285 Datasheet

Current PartRFQ

ECS-160-20-3X-TR

ECS Inc.In Stock: 479781ECS-160-20-3X-TR Datasheet

SimilarRFQ

ECS-160-20-5PVX

ECS Inc.In Stock: 4577ECS-160-20-5PVX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9C16000285 is based on the following criteria:

Critical Parameters (Must Match):

• Frequency: 16.0000 MHz
• Frequency Tolerance: ±30ppm
• Package / Case: HC-49/US
• Mounting Type: Surface Mount

Allowable Variations:

• Load Capacitance: The main part specifies 16pF. Substitute parts with 20pF load capacitance are acceptable when the circuit design accommodates the higher capacitive load. This parameter affects the oscillator tank circuit but does not prevent functional substitution if the circuit is designed for the higher value.
• ESR: The main part specifies 30 Ohms. Substitute parts with 50 Ohms ESR are acceptable when the oscillator drive circuit can supply sufficient drive level. Higher ESR requires higher drive current but does not prevent substitution in properly designed circuits.
• Product Status: Active substitute parts are preferred over obsolete parts for long-term availability and supply chain continuity.

The identified substitute parts ECS-160-20-5PVX and ECS-160-20-3X-TR meet all critical parameters and are manufactured by ECS Inc., an established crystal manufacturer.

Parameter Comparison

Engineering Selection Recommendations

ECS-160-20-5PVX (Primary Substitute): This part maintains identical physical dimensions (11.40mm x 4.80mm) to the 9C16000285, ensuring direct PCB footprint compatibility without layout modifications. The ECS-160-20-5PVX is active product status, providing assured long-term availability. It is ROHS3 compliant and REACH unaffected, offering superior regulatory compliance compared to the obsolete TXC part. The 20pF load capacitance and 50 Ohms ESR require oscillator circuit verification but present no fundamental incompatibility. This part is recommended for applications where PCB layout cannot be modified.

ECS-160-20-3X-TR (Secondary Substitute): This part offers reduced physical dimensions (7.00mm x 4.10mm) and lower profile (2.30mm height), enabling space optimization in compact designs. Active product status and REACH unaffected status provide regulatory advantages. The smaller footprint requires PCB layout modification but may be preferred in space-constrained applications. Higher inventory availability (479,711 pcs) supports volume production requirements.

Selection Criteria:

• Choose ECS-160-20-5PVX for direct replacement without PCB redesign
• Choose ECS-160-20-3X-TR for new designs or when space optimization is required
• Both parts require oscillator circuit validation for load capacitance and ESR compatibility
• Both parts satisfy frequency, tolerance, package, and compliance requirements

Frequently Asked Questions (FAQ)

Q: Can ECS-160-20-5PVX and ECS-160-20-3X-TR be used interchangeably with 9C16000285?

A: Both ECS parts are functionally equivalent for frequency and tolerance specifications. However, they differ in load capacitance (20pF vs. 16pF) and ESR (50 Ohms vs. 30 Ohms). The oscillator circuit must be designed to accommodate these parameters. Physical dimensions differ between the two ECS parts, so they are not interchangeable on the same PCB without layout modification.

Q: What is the impact of 20pF load capacitance versus 16pF?

A: Load capacitance affects the crystal's resonant frequency in the oscillator circuit. A 4pF increase requires circuit compensation through oscillator tank capacitance adjustment. The circuit designer must verify that the oscillator can accommodate the higher load capacitance without exceeding frequency tolerance limits.

Q: What is the impact of 50 Ohms ESR versus 30 Ohms?

A: ESR determines the energy required to sustain oscillation. Higher ESR (50 Ohms) requires greater drive current from the oscillator circuit. The oscillator must be capable of supplying sufficient drive level. This is a design consideration but does not prevent substitution in properly specified circuits.

Q: Are the ECS parts ROHS3 compliant?

A: Yes, both ECS-160-20-5PVX and ECS-160-20-3X-TR are ROHS3 compliant. The original 9C16000285 is also ROHS3 compliant.

Q: What is the difference in REACH status?

A: The 9C16000285 is REACH affected, indicating it may contain substances of concern. Both ECS substitute parts are REACH unaffected, indicating compliance with REACH regulations without substance restrictions. This provides regulatory advantage for applications subject to REACH requirements.

Q: Can ECS-160-20-3X-TR be used as a direct replacement on existing PCBs?

A: No. The ECS-160-20-3X-TR has different physical dimensions (7.00mm x 4.10mm vs. 11.40mm x 4.80mm) and lower profile (2.30mm vs. 4.10mm). PCB footprint and component placement must be modified. This part is suitable for new designs or PCB redesigns.

Q: Which substitute part should be selected for production?

A: ECS-160-20-5PVX is recommended for existing designs requiring direct replacement. ECS-160-20-3X-TR is recommended for new designs or when space optimization is required. Both parts are active status with established supply chains.