KXR94-2353-FR Equivalent & Substitute Parts

Part Overview

The KXR94-2353-FR is a digital accelerometer manufactured by Kionix Inc., designed for motion sensing applications requiring three-axis acceleration measurement. This device features ±2g acceleration range with SPI output interface and operates across industrial temperature ranges. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support, redesigns, and procurement planning.

Substiute Parts

KXR94-2353-FR

Kionix Inc.In Stock: 942KXR94-2353-FR Datasheet

Current PartRFQ

KX123-1039

Kionix Inc.In Stock: 800KX123-1039 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KXR94-2353-FR is determined by the following critical parameters:

Core Functional Requirements:

• Three-axis acceleration measurement (X, Y, Z)
• Digital output interface (SPI or compatible protocol)
• ±2g acceleration range capability
• Operating temperature range: -40°C ~ 85°C
• Surface mount packaging

Electrical Compatibility:

• Supply voltage compatibility or step-down regulation feasibility
• Output protocol compatibility (SPI primary requirement)

Mechanical Compatibility:

• Pin count and footprint considerations
• Package type and thermal characteristics

The KX123-1039 qualifies as a substitute based on these criteria: it maintains three-axis acceleration measurement, supports SPI output, includes ±2g range as a selectable option, operates across the required temperature range, and is available in surface mount packaging. The substitute offers extended functionality (multiple acceleration ranges, I2C option, higher bandwidth) while maintaining backward compatibility with the core ±2g SPI requirement.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The KXR94-2353-FR is classified as obsolete, indicating discontinued manufacturing and limited long-term availability. The KX123-1039 maintains active product status with current manufacturing support and established supply chains.

Compliance & Certifications: Both devices maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 3, 168 Hours), ensuring equivalent handling and storage requirements. Both are REACH unaffected and share the same ECCN classification (7A994), maintaining regulatory consistency for export and procurement purposes.

Functional Equivalence: The KX123-1039 provides functional equivalence at the ±2g SPI configuration level while offering extended operational flexibility through selectable acceleration ranges and dual interface support. The substitute's wider supply voltage range (1.71V ~ 3.6V) accommodates the 3.3V requirement of the original part with additional margin for system design flexibility.

Package Transition: The transition from 14-DFN (5x5) to 16-VFLGA (3x3) requires PCB layout modification. The substitute's smaller footprint (3x3mm vs 5x5mm) may provide space optimization benefits in redesign scenarios.

Frequently Asked Questions (FAQ)

Q: Can the KX123-1039 directly replace the KXR94-2353-FR without firmware changes?

A: The KX123-1039 supports SPI output and ±2g acceleration range, matching the core interface and measurement capability of the KXR94-2353-FR. However, the substitute features different sensitivity values (16384 LSB/g at ±2g vs 819 LSB/g), requiring firmware recalibration for data interpretation. Register maps and command structures may differ; consult device datasheets for protocol-level compatibility verification.

Q: What are the package compatibility implications?

A: The KXR94-2353-FR uses 14-DFN (5x5) packaging while the KX123-1039 uses 16-VFLGA (3x3) packaging. These are not pin-compatible and require PCB redesign. The substitute's smaller footprint and different pin configuration necessitate new layout and routing.

Q: Are both devices suitable for the same operating temperature range?

A: Yes. Both devices operate across -40°C ~ 85°C (TA), maintaining identical temperature specifications for industrial applications.

Q: What supply voltage considerations apply to the substitute?

A: The KXR94-2353-FR requires 3.3V supply. The KX123-1039 accepts 1.71V ~ 3.6V, providing wider voltage tolerance. The 3.3V requirement of the original part falls within the substitute's operating range without additional regulation.

Q: How do the acceleration range options differ?

A: The KXR94-2353-FR provides fixed ±2g measurement. The KX123-1039 offers selectable ranges (±2g, ±4g, ±8g) via register configuration, allowing system optimization for different acceleration profiles without component substitution.

Q: Are there differences in output interface capabilities?

A: The KXR94-2353-FR provides SPI output only. The KX123-1039 supports both I2C and SPI, offering interface flexibility for system integration. SPI mode operation ensures compatibility with existing KXR94-2353-FR interface implementations.