LMF100CIWM Equivalent & Substitute Parts

Part Overview

The LMF100CIWM is a Universal Switched Capacitor Filter IC manufactured by Texas Instruments, designed as a 4th Order 100kHz interface component in a 20-SOIC surface mount package. This part is classified as obsolete, making identification of suitable substitutes essential for ongoing system support and new design implementations. The LMF100CIWM operates across a supply voltage range of 4V to 15V and integrates two independent filters within a single package.

Substiute Parts

LMF100CIWM

Texas InstrumentsIn Stock: 1479LMF100CIWM Datasheet

Current PartRFQ

LTC1060CSW

Analog Devices Inc.In Stock: 2194LTC1060CSW Datasheet

MFR RecommendedRFQ

LTC1060CSW#PBF

Analog Devices Inc.In Stock: 2109LTC1060CSW#PBF Datasheet

MFR RecommendedRFQ

LTC1060CSW#TRPBF

Analog Devices Inc.In Stock: 2317LTC1060CSW#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMF100CIWM is based on the following critical parameters that must align between the original and substitute components:

Mechanical Compatibility: Both the original and substitute parts must share identical mounting type (Surface Mount) and package configuration (20-SOIC with 0.295" / 7.50mm width) to ensure PCB footprint compatibility without redesign.

Functional Architecture: The substitute must maintain the same filter topology (Universal Switched Capacitor), filter order (4th), and number of integrated filters (2) to preserve signal processing characteristics.

Electrical Operation: The substitute must support the required frequency range and voltage supply specifications. The LMF100CIWM operates at 100kHz with a 4V to 15V supply range.

The LTC1060CSW family from Analog Devices Inc. satisfies these mechanical and functional requirements through identical 20-SOIC packaging and matching 4th Order Universal Switched Capacitor architecture with dual filters. However, the LTC1060CSW operates at 30kHz center frequency with a ±2.37V to 5V supply range, representing a functional variation that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The LMF100CIWM is classified as obsolete, while all LTC1060CSW variants are active products with ongoing manufacturer support and availability. Active product status ensures continued supply chain access and technical documentation support.

Compliance Status: The LTC1060CSW family is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), compared to the LMF100CIWM's RoHS non-compliance and limited moisture handling (MSL 2A, 4 weeks). This represents improved environmental compliance and handling robustness for the substitute parts.

Packaging Variants: LTC1060CSW#PBF is supplied in Tube packaging, while LTC1060CSW and LTC1060CSW#TRPBF do not specify packaging designation. All three variants share identical electrical specifications and 20-SOIC package geometry.

Frequency and Voltage Differences: The LTC1060CSW operates at 30kHz center frequency with ±2.37V to 5V supply range, differing from the LMF100CIWM's 100kHz operation and 4V to 15V supply range. Application-specific evaluation is required to determine if these parameter differences are acceptable for the intended circuit function.

Frequently Asked Questions (FAQ)

Q: Can LTC1060CSW parts directly replace LMF100CIWM without PCB modification?

A: Yes, from a mechanical standpoint. All LTC1060CSW variants use identical 20-SOIC surface mount packaging with matching 0.295" / 7.50mm width, enabling direct footprint compatibility without PCB redesign.

Q: What are the key electrical differences between LMF100CIWM and LTC1060CSW?

A: The LMF100CIWM operates at 100kHz with 4V to 15V supply voltage, while LTC1060CSW operates at 30kHz with ±2.37V to 5V supply voltage. Both maintain identical 4th Order Universal Switched Capacitor architecture with dual filters. Application requirements determine whether these frequency and voltage differences are acceptable.

Q: Are all LTC1060CSW variants electrically equivalent?

A: Yes. LTC1060CSW, LTC1060CSW#PBF, and LTC1060CSW#TRPBF share identical electrical specifications. The primary difference is packaging format: LTC1060CSW#PBF is supplied in Tube packaging, while the other variants do not specify packaging designation.

Q: What compliance improvements does LTC1060CSW offer over LMF100CIWM?

A: LTC1060CSW is ROHS3 compliant with MSL 1 (unlimited moisture sensitivity), compared to LMF100CIWM's RoHS non-compliance and MSL 2A (4-week limitation). These improvements support modern environmental standards and reduce handling constraints during assembly and storage.

Q: Why is the LMF100CIWM obsolete?

A: The LMF100CIWM is classified as obsolete by Texas Instruments. LTC1060CSW variants from Analog Devices Inc. are active products with ongoing manufacturer support, making them suitable alternatives for new designs and legacy system support.