LMF100CIWM/NOPB Equivalent & Substitute Parts

Part Overview

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

Substiute Parts

LMF100CIWM/NOPB

Texas InstrumentsIn Stock: 18503LMF100CIWM/NOPB 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

Substitute parts for the LMF100CIWM/NOPB are identified based on the following critical parameters that define functional compatibility:

Matching Parameters:

• Filter Type: Universal Switched Capacitor
• Filter Order: 4th
• Number of Filters: 2
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Allowable Variation:

• Frequency - Cutoff or Center: The substitute parts operate at 30kHz, which differs from the original 100kHz specification. This variation is acceptable within the switched capacitor filter category as frequency selection is application-dependent and can be configured through external clock frequency adjustment in typical filter IC implementations.
• Voltage - Supply: Substitute parts operate at ±2.37V ~ 5V, which represents a different supply voltage range than the original 4V ~ 15V specification. This difference reflects the distinct design architecture of the substitute manufacturer.

The substitute parts LTC1060CSW, LTC1060CSW#PBF, and LTC1060CSW#TRPBF from Analog Devices Inc. share the same package footprint, filter topology, and core functional architecture, enabling direct substitution in applications where the frequency and voltage specifications align with system requirements.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (LTC1060CSW, LTC1060CSW#PBF, and LTC1060CSW#TRPBF) are manufactured by Analog Devices Inc. and maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete LMF100CIWM/NOPB. All substitute options are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

The LTC1060CSW#PBF variant is supplied in Tube packaging, while LTC1060CSW and LTC1060CSW#TRPBF do not specify packaging format. The LTC1060CSW#PBF and LTC1060CSW#TRPBF variants demonstrate improved moisture sensitivity characteristics (MSL 1 with unlimited duration) compared to the original part (MSL 3 with 168-hour limitation), providing enhanced reliability in storage and handling scenarios.

Selection between the three substitute options should be based on packaging requirements and inventory availability. All three parts are electrically equivalent and functionally interchangeable within the constraints of the specified frequency and voltage parameters.

Frequently Asked Questions (FAQ)

Q: Can the LTC1060CSW series directly replace the LMF100CIWM/NOPB in existing designs?

A: Direct physical replacement is possible due to identical 20-SOIC package footprints. However, functional compatibility depends on system frequency and voltage specifications. The LTC1060CSW operates at 30kHz with ±2.37V ~ 5V supply, whereas the LMF100CIWM/NOPB operates at 100kHz with 4V ~ 15V supply. Applications must accommodate these parameter differences.

Q: What is the difference between LTC1060CSW, LTC1060CSW#PBF, and LTC1060CSW#TRPBF?

A: These are variant designations of the same base part number LTC1060. The primary difference is packaging format: LTC1060CSW#PBF is supplied in Tube packaging, while the other variants do not specify packaging designation. Electrical specifications and performance characteristics are identical across all three variants.

Q: Why does the substitute part have a lower frequency specification (30kHz vs. 100kHz)?

A: The LTC1060 series is designed with a 30kHz center frequency as a standard specification. Frequency selection in switched capacitor filter applications is determined by external clock frequency, allowing system designers to configure the filter response within the IC's operational range. Applications requiring different frequency responses should evaluate whether the LTC1060 architecture supports the required frequency range through clock adjustment.

Q: Are there any supply voltage compatibility concerns when substituting?

A: Yes. The LMF100CIWM/NOPB operates with a single-supply range of 4V ~ 15V, while the LTC1060CSW series operates with a dual-supply range of ±2.37V ~ 5V. System power supply architecture must be evaluated to ensure compatibility with the substitute part's voltage requirements.

Q: What is the significance of the MSL rating difference?

A: The LMF100CIWM/NOPB has MSL 3 (168 hours), meaning the component must be used within 168 hours of moisture exposure. The LTC1060CSW series has MSL 1 (unlimited), indicating superior moisture resistance and no time-based storage restrictions. This provides operational advantages for long-term inventory management and component handling.