KX124-1051 Equivalent & Substitute Parts

Part Overview

The KX124-1051 is a digital accelerometer manufactured by Kionix Inc., designed for motion sensing applications requiring multi-axis acceleration measurement. This device features a 16-LGA (3x3) surface mount package and supports both I2C and SPI communication protocols. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The KX124-1051 offers selectable acceleration ranges (±2g, ±4g, ±8g) with an 800Hz bandwidth and operates across a supply voltage range of 1.71V to 3.6V.

Substiute Parts

KX124-1051

Kionix Inc.In Stock: 10396KX124-1051 Datasheet

Current PartRFQ

KXTJ3-1057

Kionix Inc.In Stock: 195631KXTJ3-1057 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the KX124-1051 is determined by the following critical parameters:

Core Functional Requirements:

• Multi-axis acceleration sensing (X, Y, Z)
• Digital output interface compatibility
• Selectable acceleration range capability
• 800Hz bandwidth performance
• Supply voltage range: 1.71V – 3.6V
• Operating temperature range: -40°C to +85°C

Physical & Environmental Constraints:

• Surface mount technology
• RoHS3 compliance
• MSL 3 rating (168 Hours)

The KXTJ3-1057 qualifies as a substitute based on matching all core functional requirements and environmental compliance specifications. While the KXTJ3-1057 uses a smaller 12-LGA (2x2) package and supports an extended acceleration range (±2g, ±4g, ±8g, ±16g), it maintains digital output via I2C, identical supply voltage specifications, matching bandwidth, and equivalent temperature operating range. Both devices are manufactured by Kionix Inc. and maintain ROHS3 compliance with identical MSL ratings.

Parameter Comparison

Engineering Selection Recommendations

The KXTJ3-1057 is suitable as a substitute for the obsolete KX124-1051 in applications where the following conditions are met:

Compliance & Certification: Both devices maintain identical RoHS3 compliance and MSL 3 ratings, ensuring equivalent environmental and regulatory standing for production and field deployment.

Electrical Compatibility: Matching supply voltage specifications (1.71V – 3.6V) and operating temperature range (-40°C to +85°C) ensure direct electrical compatibility in existing circuit designs.

Functional Compatibility: Both devices provide three-axis digital acceleration measurement with 800Hz bandwidth and selectable acceleration ranges. The KX124-1051's ±2g, ±4g, ±8g range is fully contained within the KXTJ3-1057's extended ±2g, ±4g, ±8g, ±16g capability.

Interface Consideration: The KX124-1051 supports both I2C and SPI protocols, while the KXTJ3-1057 supports I2C only. Designs utilizing SPI communication require verification that I2C operation is feasible or that alternative solutions are implemented.

Package Footprint: The KXTJ3-1057 uses a smaller 12-LGA (2x2) package compared to the KX124-1051's 16-LGA (3x3) package. PCB layout modifications are required to accommodate the different footprint and pin configuration.

Frequently Asked Questions (FAQ)

Q: Can the KXTJ3-1057 directly replace the KX124-1051 without PCB modifications?

A: No. While both devices are functionally compatible, the KXTJ3-1057 uses a 12-LGA (2x2) package versus the KX124-1051's 16-LGA (3x3) package. PCB layout redesign is necessary to accommodate the different footprint and pin assignments.

Q: What is the primary reason for substituting the KX124-1051?

A: The KX124-1051 is classified as obsolete. The KXTJ3-1057 is an active product from the same manufacturer, ensuring ongoing availability, technical support, and production continuity.

Q: Are there communication protocol differences between these devices?

A: Yes. The KX124-1051 supports both I2C and SPI interfaces, while the KXTJ3-1057 supports I2C only. Applications requiring SPI communication must implement alternative solutions or confirm I2C compatibility with system architecture.

Q: Do both devices operate at the same supply voltage?

A: Yes. Both the KX124-1051 and KXTJ3-1057 operate across the identical supply voltage range of 1.71V to 3.6V, ensuring direct electrical compatibility in power supply design.

Q: What is the difference in acceleration range capability?

A: The KX124-1051 offers ±2g, ±4g, and ±8g selectable ranges. The KXTJ3-1057 extends this to ±2g, ±4g, ±8g, and ±16g. The KXTJ3-1057's extended range is a superset of the KX124-1051's capability and does not restrict existing applications.

Q: Are environmental compliance ratings identical?

A: Yes. Both devices are ROHS3 compliant with MSL 3 ratings (168 Hours), ensuring equivalent environmental and regulatory compliance for manufacturing and field deployment.

Q: What is the bandwidth specification for both devices?

A: Both the KX124-1051 and KXTJ3-1057 operate at 800Hz bandwidth, providing identical frequency response characteristics for motion sensing applications.