LM231N Equivalent & Substitute Parts Reference

Part Overview

The LM231N is a Voltage to Frequency Converter IC from Texas Instruments, categorized under Power Management (PMIC). It provides high linearity and precision for voltage to frequency conversion up to 100 kHz. The LM231N is supplied in an 8-DIP (0.300", 7.62mm) through-hole package. This part is currently listed as Obsolete, which necessitates the identification of equivalent and substitute models to maintain system compatibility and spare part availability. The recommended substitute, LM231N/NOPB, is specifically noted in the input and shares the core functional characteristics.

Substiute Parts

LM231N

Texas InstrumentsIn Stock: 8367LM231N Datasheet

Current PartRFQ

LM231N/NOPB

Texas InstrumentsIn Stock: 5317LM231N/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM231N are grouped exclusively according to matching core parameters critical to performance and compatibility within the Voltage to Frequency Converter PMIC category. These strictly include: manufacturer, maximum frequency, full scale, linearity, mounting type, package/case, and key compliance attributes. Substitute parts are included only if they precisely match these criteria. The input identifies LM231N/NOPB as meeting all requisite parameters for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The LM231N is classified as obsolete. The designated substitute, LM231N/NOPB, directly matches in all provided electrical and mechanical parameters, including package, frequency rating, linearity, and mounting type. The primary differentiator is the RoHS compliance status; LM231N is RoHS non-compliant, while LM231N/NOPB is ROHS3 compliant. Both share the same Moisture Sensitivity Level and REACH status. Selection should be based on availability and compliance requirements specific to the end-application.

Frequently Asked Questions (FAQ)

Q: What are the critical criteria for substituting the LM231N?
A: Substitution requires strict equivalence in maximum frequency, linearity, full scale, package type, mounting style, and supplier device package, as well as compliance attributes when required for regulatory or environmental considerations.

Q: Is the LM231N/NOPB a mechanically compatible substitute for the LM231N?
A: Yes, both ICs utilize the 8-DIP (0.300", 7.62mm) through-hole package and the 8-PDIP supplier device package, ensuring mechanical and footprint compatibility.

Q: Are there differences in environmental compliance between LM231N and LM231N/NOPB?
A: Yes. LM231N is RoHS non-compliant, while LM231N/NOPB is ROHS3 compliant. Both are REACH unaffected.

Q: Are there electrical performance differences between the LM231N and LM231N/NOPB?
A: Based on the specified parameters, both parts are equivalent in maximum frequency, linearity, full scale, and functional type.

Q: Does the Moisture Sensitivity Level between LM231N and its substitute differ?
A: No. Both LM231N and LM231N/NOPB have a Moisture Sensitivity Level (MSL) of 1 (Unlimited).