TOM-1545S-C33 Equivalent & Substitute Parts

Part Overview

The TOM-1545S-C33 is an analog electret condenser microphone manufactured by PUI Audio, Inc., designed for omnidirectional audio capture with -45dB sensitivity. This component features solderless (Bullseye) termination and operates across a 2V to 10V supply range. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

TOM-1545S-C33

PUI Audio, Inc.In Stock: 931TOM-1545S-C33 Datasheet

Current PartRFQ

TOM-1545S-C33-R

PUI Audio, Inc.In Stock: 920TOM-1545S-C33-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOM-1545S-C33 is determined by strict equivalence across the following critical parameters:

• Microphone type: Electret Condenser
• Output configuration: Analog
• Directional pattern: Omnidirectional
• Sensitivity specification: -45dB ±3dB
• S/N Ratio: 60dB
• Impedance: 2.2 kOhms
• Voltage operating range: 2V ~ 10V
• Current consumption: 500 µA
• Physical dimensions: 0.157" Dia (4.00mm), Height 0.067" (1.70mm)
• Shape: Circular
• Port location: Top

The primary distinction between the main part and its substitute relates to termination method (solderless versus solder pads) and product status (obsolete versus active). These differences do not affect electrical performance or core functionality when properly integrated into the target application.

Parameter Comparison

Engineering Selection Recommendations

The TOM-1545S-C33-R serves as the direct functional equivalent to the obsolete TOM-1545S-C33. Both components share identical electrical specifications, acoustic characteristics, and physical dimensions. The substitute part is currently in active production status, ensuring supply chain availability.

Key considerations for selection:

Termination compatibility: The TOM-1545S-C33-R employs solder pads rather than solderless (Bullseye) termination. PCB design modifications are required to accommodate this change.

Regulatory compliance: The TOM-1545S-C33-R achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This distinction is relevant for applications subject to RoHS directives.

Production status: Active availability of the TOM-1545S-C33-R eliminates obsolescence risk associated with the original part number.

Frequently Asked Questions (FAQ)

Q: Are the TOM-1545S-C33 and TOM-1545S-C33-R electrically interchangeable?

A: Yes. Both components deliver identical electrical performance across all specified parameters: sensitivity (-45dB ±3dB), impedance (2.2 kOhms), voltage range (2V ~ 10V), and current consumption (500 µA). The acoustic output characteristics are equivalent.

Q: What is the primary difference between these two part numbers?

A: The termination method differs. The TOM-1545S-C33 uses solderless (Bullseye) connection, while the TOM-1545S-C33-R uses solder pads. Additionally, the substitute part is in active production status, whereas the original is obsolete.

Q: Does the termination difference affect performance?

A: No. Termination method is a mechanical interface consideration only. Electrical performance and acoustic characteristics remain unchanged. PCB layout and assembly process must be adapted to the solder pad configuration.

Q: Is the TOM-1545S-C33-R suitable for RoHS-regulated applications?

A: Yes. The TOM-1545S-C33-R is ROHS3 compliant. The original TOM-1545S-C33 is RoHS non-compliant and may not meet regulatory requirements for certain markets or applications.

Q: What are the physical dimensions, and do they match between both parts?

A: Both components share identical physical specifications: 0.157" diameter (4.00mm), maximum height 0.067" (1.70mm), circular shape, and top port location. PCB footprint modifications are necessary only to accommodate the termination change.

Q: Are there frequency response specifications provided for these microphones?

A: The TOM-1545S-C33-R specifies a frequency range of 20 Hz ~ 20 kHz. This specification is not provided for the original TOM-1545S-C33 in the available data.