XR4151CP-F Equivalent & Substitute Parts

Part Overview

The XR4151CP-F is a Voltage to Frequency Converter IC manufactured by MaxLinear, Inc., designed for 10 kHz operation with ±0.05% linearity in an 8-PDIP through-hole package. This component has reached obsolete product status, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

XR4151CP-F

MaxLinear, Inc.In Stock: 10371XR4151CP-F Datasheet

Current PartRFQ

LM231AN/NOPB

Texas InstrumentsIn Stock: 5968LM231AN/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the XR4151CP-F is determined by the following criteria:

• Functional equivalence: Device must perform voltage-to-frequency conversion
• Package compatibility: 8-DIP (0.300", 7.62mm) through-hole mounting required for direct PCB replacement
• Electrical performance: Substitute must meet or exceed the linearity and frequency specifications of the original part
• Pinout compatibility: Pin configuration must match the original device for socket-level replacement

The LM231AN/NOPB from Texas Instruments meets these substitution criteria. While it operates at a higher maximum frequency (100 kHz) and exhibits superior linearity (±0.01%) and temperature stability (±50 ppm/°C), these enhanced specifications are backward-compatible with applications designed for the XR4151CP-F. The identical 8-DIP package and through-hole mounting enable direct replacement without PCB modification.

Parameter Comparison

Engineering Selection Recommendations

The LM231AN/NOPB is the designated manufacturer-recommended substitute for the XR4151CP-F. Selection of this alternative is supported by:

• Product availability: The LM231AN/NOPB maintains active product status with established supply channels, whereas the XR4151CP-F is obsolete
• Regulatory compliance: The LM231AN/NOPB is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements
• Electrical superiority: Enhanced linearity (±0.01% vs. ±0.05%) and improved temperature stability (±50 ppm/°C vs. ±100 ppm/°C) provide performance margin for existing applications
• Package equivalence: Identical 8-DIP through-hole package enables direct PCB replacement without design modification
• Functional compatibility: Higher maximum frequency (100 kHz) does not compromise operation in circuits designed for 10 kHz maximum frequency

Frequently Asked Questions (FAQ)

Q: Can the LM231AN/NOPB be used as a direct replacement for the XR4151CP-F without PCB modification?

A: Yes. Both devices use identical 8-DIP (0.300", 7.62mm) through-hole packages with compatible pinouts, enabling socket-level replacement without PCB redesign.

Q: What are the key electrical differences between these parts?

A: The LM231AN/NOPB operates at 100 kHz maximum frequency compared to the XR4151CP-F at 10 kHz. The LM231AN/NOPB also provides superior linearity (±0.01% vs. ±0.05%) and better temperature stability (±50 ppm/°C vs. ±100 ppm/°C). These enhanced specifications are backward-compatible with applications designed for the original part.

Q: Why is the XR4151CP-F listed as obsolete?

A: The XR4151CP-F has reached end-of-life status and is no longer in active production. The LM231AN/NOPB represents the current-generation equivalent with improved performance characteristics and ongoing manufacturer support.

Q: Are there any compliance or regulatory differences?

A: The LM231AN/NOPB is ROHS3 compliant and REACH unaffected, meeting current environmental regulations. Both devices carry identical moisture sensitivity levels (MSL 1) and ECCN classification (EAR99).

Q: Will the higher frequency capability of the LM231AN/NOPB affect my existing circuit?

A: No. The maximum frequency specification indicates the upper operating limit. Circuits designed for 10 kHz operation will function identically with the LM231AN/NOPB, which simply provides additional frequency headroom.