KX123-1039 Equivalent & Substitute Parts

Part Overview

The KX123-1039 is a digital accelerometer manufactured by Kionix Inc., designed for motion sensing applications requiring multi-axis acceleration measurement. This Active product features a 16-LGA (3x3) surface mount package and supports both I2C and SPI communication protocols. The device operates across a supply voltage range of 1.71V to 3.6V with selectable acceleration ranges of ±2g, ±4g, and ±8g, making it suitable for embedded systems, IoT devices, and industrial motion monitoring applications. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and supply chain continuity.

Substiute Parts

KX123-1039

Kionix Inc.In Stock: 800KX123-1039 Datasheet

Current PartRFQ

LIS2HH12TR

STMicroelectronicsIn Stock: 121503LIS2HH12TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KX123-1039 are identified based on strict alignment with the following critical parameters:

• Functional Equivalence: Digital accelerometer with X, Y, Z axis measurement capability
• Acceleration Range: Support for ±2g, ±4g, and ±8g selectable ranges
• Communication Protocol: I2C and SPI interface support
• Supply Voltage: Operating range of 1.71V to 3.6V
• Temperature Range: Operating specification of -40°C to 85°C
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status
• Mounting Technology: Surface mount configuration

The LIS2HH12TR from STMicroelectronics meets these substitution criteria. While package geometry differs (12-LGA versus 16-LGA), both devices provide equivalent functional performance within the specified electrical and operational parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the KX123-1039 and LIS2HH12TR are Active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications. Selection between these devices should be based on:

Package Footprint Compatibility: The KX123-1039 uses a 16-LGA (3x3) package, while the LIS2HH12TR uses a 12-LGA (2x2) package. PCB layout and available space determine which package is suitable for your application.

Bandwidth Requirements: The KX123-1039 supports bandwidth up to 12.8kHz, while the LIS2HH12TR supports up to 400Hz. Applications requiring higher frequency response should prioritize the KX123-1039.

Sensitivity Alignment: Both devices provide nearly identical sensitivity specifications across acceleration ranges, with LSB/g values within 0.06% variance at ±2g and 0.05% variance at ±8g.

Supply Chain Availability: The LIS2HH12TR has significantly higher inventory availability (121,400 pcs) compared to the KX123-1039 (766 pcs), which may influence procurement decisions for high-volume production.

Frequently Asked Questions (FAQ)

Q: Can the LIS2HH12TR directly replace the KX123-1039 in existing designs?

A: Functional replacement is possible if PCB layout accommodates the 12-LGA (2x2) package footprint and bandwidth requirements do not exceed 400Hz. Pin-to-pin compatibility requires verification against device datasheets, as package geometry differs.

Q: What are the key differences between these accelerometers?

A: The primary differences are package size (16-LGA versus 12-LGA), maximum bandwidth (12.8kHz versus 400Hz), and pin count. Electrical specifications, acceleration ranges, communication protocols, and operating conditions are equivalent.

Q: Are both devices suitable for industrial temperature environments?

A: Yes. Both devices operate across -40°C to 85°C, meeting industrial temperature requirements. Both maintain ROHS3 compliance and REACH unaffected status for regulated applications.

Q: How do sensitivity specifications compare?

A: Sensitivity values are nearly identical. At ±2g, the KX123-1039 provides 16384 LSB/g versus 16393 LSB/g for the LIS2HH12TR. At ±8g, values are 4096 LSB/g versus 4098 LSB/g respectively. These differences are negligible for most applications.

Q: Which device should I select for high-frequency motion sensing?

A: The KX123-1039 supports bandwidth up to 12.8kHz, making it suitable for applications requiring high-frequency response. The LIS2HH12TR is limited to 400Hz bandwidth and is appropriate for lower-frequency motion monitoring.

Q: Do both devices support the same communication protocols?

A: Yes. Both the KX123-1039 and LIS2HH12TR support I2C and SPI interfaces, ensuring software compatibility across equivalent implementations.