LM2917MX-8 Frequency to Voltage Converter IC - Equivalent & Substitute Parts

Part Overview

The LM2917MX-8 is a Frequency to Voltage Converter IC designed for 10 kHz maximum frequency operation with ±0.3% linearity. This component converts frequency input signals into proportional voltage outputs, commonly used in tachometer circuits, frequency measurement applications, and phase-locked loop systems.

The LM2917MX-8 carries a "Not For New Designs" product status, indicating Texas Instruments has transitioned this part to end-of-life. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for existing applications and legacy system maintenance.

Substiute Parts

LM2917MX-8

Texas InstrumentsIn Stock: 3217LM2917MX-8 Datasheet

Current PartRFQ

LM2917MX-8/NOPB

Texas InstrumentsIn Stock: 3549LM2917MX-8/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2917MX-8 is determined by strict equivalence across the following parameters:

• Functional Type: Frequency to Voltage Converter
• Maximum Frequency: 10 kHz
• Linearity Specification: ±0.3%
• Package Configuration: 8-SOIC (0.154", 3.90mm Width)
• Mounting Technology: Surface Mount
• Base Product Series: LM2917

Parts meeting all these criteria are classified as direct functional and mechanical equivalents. Variations in product status, RoHS compliance, or packaging format (Tape & Reel vs. alternative formats) do not affect electrical substitutability when the core parameters remain identical.

Parameter Comparison

Engineering Selection Recommendations

The LM2917MX-8/NOPB is the direct electrical and mechanical equivalent of the LM2917MX-8. Both parts share identical frequency response, linearity, package geometry, and pin configuration.

The primary distinction is product lifecycle status: LM2917MX-8/NOPB carries "Active" designation, indicating ongoing manufacturer support and availability. Additionally, LM2917MX-8/NOPB meets ROHS3 compliance requirements, whereas the original LM2917MX-8 does not.

For applications requiring RoHS compliance or long-term supply assurance, LM2917MX-8/NOPB is the appropriate selection. For legacy systems where RoHS compliance is not mandated, either part functions identically within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can LM2917MX-8/NOPB replace LM2917MX-8 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. Pin configuration, frequency response, linearity, and package dimensions are equivalent. Direct substitution requires no circuit modifications.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix designates "No Plumbum" (lead-free) packaging, indicating RoHS3 compliance. This affects material composition but not electrical performance or pin compatibility.

Q: Are there differences in frequency response between these parts?

A: No. Both parts operate at 10 kHz maximum frequency with ±0.3% linearity. Frequency-to-voltage conversion characteristics are identical.

Q: Does RoHS compliance affect circuit performance?

A: RoHS compliance affects material composition and environmental impact, not electrical performance. Both compliant and non-compliant versions deliver identical functional specifications.

Q: What is the significance of "Not For New Designs" status?

A: This status indicates Texas Instruments has discontinued active development and marketing of the LM2917MX-8. The part remains available but receives no design updates. For new applications, the active LM2917MX-8/NOPB variant is recommended.

Q: Are package dimensions identical between substitute parts?

A: Yes. Both parts use 8-SOIC packaging with 0.154" width and 3.90mm body width. PCB footprints and assembly processes are identical.