KXTJ2-1009-PR Equivalent & Substitute Parts

Part Overview

The KXTJ2-1009-PR is a digital accelerometer manufactured by Kionix Inc. designed for motion sensing applications requiring three-axis acceleration measurement. This device features selectable acceleration ranges (±2g, ±4g, ±8g) and I2C digital output, operating across a bandwidth of 0.39Hz to 800Hz. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	KXTJ2-1009-PR
Manufacturer	Kionix Inc.
Category	Motion Sensors
Type	Digital Accelerometer
Axis Configuration	X, Y, Z
Acceleration Range	±2g, ±4g, ±8g
Bandwidth	0.39Hz ~ 800Hz
Output Interface	I2C
Supply Voltage	1.8V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	12-VFLGA (2x2)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute components for the KXTJ2-1009-PR are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Three-axis acceleration measurement (X, Y, Z)
I2C digital output interface
12-VFLGA (2x2) package configuration
Surface mount mounting type
Operating temperature range of -40°C to 85°C
Supply voltage compatibility within 1.71V to 3.6V range
RoHS3 compliance

Substitute Categories:

Parametric Equivalent (KXTJ2-1009-FR): Identical electrical and mechanical specifications to the main part, differing only in packaging format (Cut Tape & Digi-Reel vs. standard packaging). This part maintains the same acceleration range (±2g, ±4g, ±8g), bandwidth (0.39Hz ~ 800Hz), and all functional parameters.

Direct Manufacturer Upgrade (KXTJ3-1057): Extended acceleration range capability (±2g, ±4g, ±8g, ±16g) with fixed 800Hz bandwidth. Maintains identical package, interface, and temperature specifications. Represents an active product with enhanced range flexibility.

Parameter Comparison

Parameter	KXTJ2-1009-PR	KXTJ2-1009-FR	KXTJ3-1057
Manufacturer	Kionix Inc.	Kionix Inc.	Kionix Inc.
Axis Configuration	X, Y, Z	X, Y, Z	X, Y, Z
Acceleration Range	±2g, ±4g, ±8g	±2g, ±4g, ±8g	±2g, ±4g, ±8g, ±16g
Bandwidth	0.39Hz ~ 800Hz	0.39Hz ~ 800Hz	800Hz
Output Interface	I2C	I2C	I2C
Supply Voltage	1.8V ~ 3.6V	1.8V ~ 3.6V	1.71V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	12-VFLGA (2x2)	12-VFLGA (2x2)	12-VFLGA (2x2)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Obsolete	Active
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalence): The KXTJ2-1009-FR provides identical functional specifications to the KXTJ2-1009-PR with no design modifications required. Both parts are obsolete products with equivalent RoHS3 compliance and moisture sensitivity ratings. Selection of KXTJ2-1009-FR is appropriate when existing inventory or legacy system support is the primary objective.

For New Designs and Long-Term Availability: The KXTJ3-1057 is the recommended substitute for new applications and systems requiring extended product lifecycle support. As an active product from Kionix Inc., it provides superior availability and supply chain continuity. The extended acceleration range (±16g capability) offers design flexibility for applications requiring higher measurement limits, while maintaining full compatibility with the I2C interface, package configuration, and operating environment specifications of the original part. All three parts maintain identical RoHS3 compliance and thermal operating ranges.

Frequently Asked Questions (FAQ)

Q: Can KXTJ3-1057 be used as a direct drop-in replacement for KXTJ2-1009-PR? A: Yes. Both parts share identical package geometry (12-VFLGA 2x2), I2C interface, operating temperature range (-40°C to 85°C), and surface mount configuration. The KXTJ3-1057 maintains backward compatibility with designs using the KXTJ2-1009-PR, with the addition of ±16g acceleration range capability.

Q: What is the difference between KXTJ2-1009-PR and KXTJ2-1009-FR? A: These parts are parametric equivalents with identical electrical and mechanical specifications. The primary difference is packaging format: KXTJ2-1009-PR uses standard packaging while KXTJ2-1009-FR is supplied in Cut Tape and Digi-Reel formats. Both are obsolete products.

Q: Why is KXTJ3-1057 recommended over KXTJ2-1009-FR for new designs? A: KXTJ3-1057 is classified as an active product, ensuring ongoing manufacturing and supply availability. KXTJ2-1009-FR is obsolete, presenting potential long-term sourcing challenges. For applications requiring extended product lifecycle support, KXTJ3-1057 is the appropriate selection.

Q: Are there any bandwidth differences between the substitute parts? A: KXTJ2-1009-PR and KXTJ2-1009-FR both support adjustable bandwidth from 0.39Hz to 800Hz. KXTJ3-1057 operates at a fixed 800Hz bandwidth. Applications requiring sub-800Hz bandwidth operation should verify compatibility with the KXTJ3-1057 fixed bandwidth specification.

Q: Do all three parts meet the same compliance requirements? A: Yes. All three parts (KXTJ2-1009-PR, KXTJ2-1009-FR, and KXTJ3-1057) are ROHS3 compliant with identical moisture sensitivity levels (MSL 3, 168 Hours) and operating temperature specifications (-40°C to 85°C).

Q: What supply voltage range should be used for each part? A: KXTJ2-1009-PR and KXTJ2-1009-FR operate within 1.8V to 3.6V. KXTJ3-1057 operates within 1.71V to 3.6V, providing slightly lower minimum voltage capability. All three parts are compatible with standard 3.3V and 1.8V supply rails.

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