SiFLEX02-R2 450-0126 802.15.4 Zigbee® Transceiver Module Equivalent & Substitute Parts

Part Overview

The Laird Connectivity SiFLEX02-R2 (part number 450-0126) is an 802.15.4 Zigbee® transceiver module operating at 900MHz with castellation surface mount configuration and external antenna interface. This module integrates the AT86RF212B RF IC and provides serial communication via JTAG, SPI, and UART interfaces.

The SiFLEX02-R2 is classified as obsolete. Identification of equivalent substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity for applications currently utilizing this module.

Substiute Parts

450-0126

Laird Connectivity Inc.In Stock: 913450-0126 Datasheet

Current PartRFQ

ATZB-X0-256-4-0-CN

Microchip TechnologyIn Stock: 792ATZB-X0-256-4-0-CN Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SiFLEX02-R2 450-0126 is determined by the following mandatory parameters:

Core Compatibility Criteria:

• RF Standard: 802.15.4
• Protocol: Zigbee®
• Frequency Band: 900MHz
• Data Rate: 1Mbps
• Integrated IC: AT86RF212B
• Memory Size: 256kB Flash, 4kB EEPROM, 16kB RAM/SRAM
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount

The ATZB-X0-256-4-0-CN from Microchip Technology meets all core compatibility criteria. Both modules utilize the AT86RF212B transceiver IC, support identical RF standards and protocols, operate across the same temperature range, and provide equivalent memory configurations. The primary differences relate to antenna implementation (external versus integrated), power output specifications, and supply voltage operating ranges, which represent design trade-offs rather than functional incompatibilities for the RF transceiver core functionality.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SiFLEX02-R2 450-0126 is classified as obsolete. The ATZB-X0-256-4-0-CN maintains active product status with Microchip Technology, ensuring ongoing availability, technical support, and compliance updates.

Compliance and Certification: Both modules are REACH Unaffected. The ATZB-X0-256-4-0-CN carries ROHS3 compliance certification, whereas RoHS status for the 450-0126 is not specified in available documentation. The ATZB-X0-256-4-0-CN carries EAR99 export classification compared to ECCN 5A002A1 for the 450-0126.

Functional Equivalence: Both modules implement the AT86RF212B transceiver IC and support identical 802.15.4 Zigbee® protocols at 900MHz with 1Mbps data rates. Memory configurations are equivalent (256kB Flash, 4kB EEPROM, 16kB RAM/SRAM). Operating temperature ranges are identical (-40°C ~ 85°C).

Design Trade-offs: The ATZB-X0-256-4-0-CN features integrated antenna design versus the external antenna approach of the 450-0126. This affects PCB layout requirements and antenna tuning considerations. The ATZB-X0-256-4-0-CN provides lower transmit current consumption (34.8mA versus 285mA) and receive current consumption (8.7mA ~ 14.5mA versus 30mA), representing significant power efficiency improvements. The 450-0126 provides higher power output (24dBm versus 11dBm). Supply voltage range for the ATZB-X0-256-4-0-CN is broader (1.8V ~ 3.6V versus 2V ~ 3.45V).

Serial Interface Compatibility: The ATZB-X0-256-4-0-CN provides additional serial interface options (ISP, USART) beyond the JTAG, SPI, and UART supported by the 450-0126. Existing JTAG, SPI, and UART implementations remain compatible.

Frequently Asked Questions (FAQ)

Q: Can the ATZB-X0-256-4-0-CN directly replace the SiFLEX02-R2 450-0126 in existing designs?

A: Both modules implement the AT86RF212B transceiver IC and support identical 802.15.4 Zigbee® protocols at 900MHz. However, direct replacement requires evaluation of antenna implementation differences. The 450-0126 uses external antenna with castellation mounting, while the ATZB-X0-256-4-0-CN integrates antenna on the module. PCB layout modifications and antenna tuning adjustments are necessary. Power output differences (24dBm versus 11dBm) and current consumption profiles must be evaluated against application requirements.

Q: What are the key differences in power consumption between these modules?

A: The ATZB-X0-256-4-0-CN demonstrates significantly lower current consumption: receive current of 8.7mA ~ 14.5mA compared to 30mA for the 450-0126, and transmit current of 34.8mA compared to 285mA for the 450-0126. This represents a substantial power efficiency advantage for battery-powered applications.

Q: Are the memory configurations equivalent?

A: Yes. Both modules provide 256kB Flash memory, 4kB EEPROM, and 16kB RAM/SRAM. Memory configurations are functionally equivalent for firmware storage and runtime operations.

Q: What is the significance of the antenna type difference?

A: The 450-0126 features castellation surface mount with external antenna interface, requiring external antenna component selection and PCB antenna routing. The ATZB-X0-256-4-0-CN integrates antenna on the module, eliminating external antenna requirements but reducing design flexibility for antenna tuning. This affects PCB layout, bill of materials, and RF performance tuning approaches.

Q: Are the operating temperature ranges compatible?

A: Yes. Both modules operate across -40°C ~ 85°C, providing identical temperature range support for industrial and extended temperature applications.

Q: What serial interface compatibility exists?

A: The 450-0126 supports JTAG, SPI, and UART. The ATZB-X0-256-4-0-CN supports ISP, JTAG, SPI, UART, and USART. Existing JTAG, SPI, and UART implementations are compatible. The ATZB-X0-256-4-0-CN provides additional ISP and USART interface options.

Q: How do supply voltage ranges differ?

A: The 450-0126 operates at 2V ~ 3.45V. The ATZB-X0-256-4-0-CN operates at 1.8V ~ 3.6V, providing broader voltage range support and enhanced compatibility with lower-voltage power supply designs.

Q: What is the MSL rating significance?

A: The 450-0126 carries MSL 4 (72 Hours), indicating moisture sensitivity requiring controlled storage and handling. The ATZB-X0-256-4-0-CN carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions and simplified storage requirements.