KX023-1025-PR Equivalent & Substitute Parts

Part Overview

The KX023-1025-PR is a digital accelerometer manufactured by Kionix Inc., designed for motion sensing applications requiring three-axis acceleration measurement. This device operates across ±2g, ±4g, and ±8g selectable ranges with dual communication interfaces (I2C and SPI), housed in a 16-pin VFLGA package. The product is currently obsolete, necessitating identification of functionally compatible alternatives for ongoing design requirements and production continuity.

Key Parameters

Parameter	KX023-1025-PR
Manufacturer	Kionix Inc.
Category	Motion Sensors
Type	Digital Accelerometer
Axis Configuration	X, Y, Z
Acceleration Range	±2g, ±4g, ±8g
Output Interface	I2C, SPI
Bandwidth	0.39Hz ~ 800Hz
Supply Voltage	1.71V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	16-VFLGA (3x3)
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the KX023-1025-PR is determined by the following core parameters:

Axis Configuration: Must support three-axis (X, Y, Z) acceleration measurement
Acceleration Range: Must include ±2g, ±4g, and ±8g selectable ranges as minimum capability
Output Interface: Must support I2C communication (SPI support is optional)
Supply Voltage: Must operate within 1.71V ~ 3.6V range
Operating Temperature: Must maintain -40°C ~ 85°C operational range
Compliance Standards: Must maintain ROHS3 compliance and equivalent MSL rating
Mounting Type: Must be surface mount compatible

The KXTJ3-1057 qualifies as a direct substitute based on these criteria. While it operates at a fixed 800Hz bandwidth (versus the variable 0.39Hz ~ 800Hz of the original), it extends the acceleration range to ±16g, maintains I2C communication capability, and preserves all critical electrical and environmental specifications.

Parameter Comparison

Parameter	KX023-1025-PR	KXTJ3-1057	Compatibility Notes
Manufacturer	Kionix Inc.	Kionix Inc.	Same manufacturer
Axis Configuration	X, Y, Z	X, Y, Z	Identical
Acceleration Range	±2g, ±4g, ±8g	±2g, ±4g, ±8g, ±16g	Substitute includes all original ranges plus ±16g extension
Output Interface	I2C, SPI	I2C	Substitute supports I2C only; SPI not available
Bandwidth	0.39Hz ~ 800Hz	800Hz	Substitute operates at fixed 800Hz maximum
Supply Voltage	1.71V ~ 3.6V	1.71V ~ 3.6V	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Package Type	16-VFLGA (3x3)	12-VFLGA (2x2)	Different package footprint; PCB layout modification required
Product Status	Obsolete	Active	Substitute is in active production
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	3 (168 Hours)	3 (168 Hours)	Identical

Engineering Selection Recommendations

The KXTJ3-1057 is the qualified substitute for the obsolete KX023-1025-PR based on product lifecycle and compliance status. The original part is no longer manufactured, making the KXTJ3-1057 the appropriate alternative for new designs and production continuity.

Key considerations for implementation:

PCB Layout Modification: The KXTJ3-1057 uses a 12-pin VFLGA (2x2) package versus the 16-pin VFLGA (3x3) of the original. Footprint redesign is required.
Interface Limitation: The substitute supports I2C communication only. Designs requiring SPI functionality must evaluate alternative solutions.
Bandwidth Configuration: The fixed 800Hz bandwidth of the KXTJ3-1057 eliminates the low-frequency capability (0.39Hz) of the original. Applications requiring sub-1Hz bandwidth must assess functional impact.
Compliance Alignment: Both parts maintain ROHS3 compliance and equivalent MSL ratings, ensuring environmental and regulatory compatibility.

Frequently Asked Questions (FAQ)

Q: Can the KXTJ3-1057 directly replace the KX023-1025-PR without design changes?

A: No. While functionally compatible for core acceleration measurement, the KXTJ3-1057 requires PCB footprint redesign due to different package geometry (12-pin versus 16-pin VFLGA). Additionally, SPI interface support is not available on the substitute.

Q: What happens if my application requires SPI communication?

A: The KXTJ3-1057 supports I2C only. If SPI is mandatory, alternative accelerometer solutions from Kionix or other manufacturers must be evaluated against your specific requirements.

Q: Is the fixed 800Hz bandwidth of the KXTJ3-1057 a limitation?

A: The original KX023-1025-PR supports variable bandwidth from 0.39Hz to 800Hz. The KXTJ3-1057 operates at fixed 800Hz. Applications requiring bandwidth below 1Hz must verify functional compatibility or select alternative components.

Q: Are both parts RoHS compliant?

A: Yes. Both the KX023-1025-PR and KXTJ3-1057 are ROHS3 compliant with identical MSL ratings (3, 168 Hours), ensuring equivalent environmental and regulatory compliance.

Q: What is the supply voltage compatibility?

A: Both parts operate within 1.71V ~ 3.6V, maintaining identical power supply requirements. No voltage regulation changes are necessary.

Q: Does the KXTJ3-1057 support the same acceleration ranges?

A: Yes. The KXTJ3-1057 supports ±2g, ±4g, and ±8g ranges identical to the original, with an additional ±16g option. All original measurement ranges are preserved.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message