Laird Connectivity 450-0076 RF TXRX Module 802.15.4 Equivalent & Substitute Parts

Part Overview

The Laird Connectivity 450-0076 is an 802.15.4 Zigbee® transceiver module operating at 2.4GHz with U.FL antenna connector, designed for surface mount applications. This module integrates the CC2520 RF IC and provides multiple serial interfaces including I2C, JTAG, SPI, and UART. The product is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs or production transitions.

Substiute Parts

450-0076

Laird Connectivity Inc.In Stock: 726450-0076 Datasheet

Current PartRFQ

451-00002

Laird Connectivity Inc.In Stock: 1504451-00002 Datasheet

SimilarRFQ

453-00021R

Laird Connectivity Inc.In Stock: 775453-00021R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 450-0076 is determined by the following critical parameters:

Primary Compatibility Criteria:

• RF Standard: 802.15.4 support (mandatory for protocol compatibility)
• Frequency Band: 2.4GHz operation
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C minimum
• RoHS Compliance: Required for regulatory alignment
• Antenna Interface: Connector type compatibility (U.FL or I-PEX variants acceptable with mechanical adaptation)

Secondary Considerations:

• Utilized IC: Determines feature set and performance characteristics
• Voltage Supply Range: Must encompass or overlap with 2V ~ 3.3V
• Serial Interfaces: I2C, SPI, UART availability for integration compatibility

The identified substitute parts 451-00002 and 453-00021R both maintain 802.15.4 standard compliance and 2.4GHz operation. However, they represent different technology generations and feature sets, requiring evaluation based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct 802.15.4 Zigbee® Replacement:

The 451-00002 (BL654 series) provides active product status with extended protocol support including Bluetooth v5.0 and Thread alongside 802.15.4 compatibility. This module utilizes the nRF52840 IC, offering significantly reduced power consumption (5.4mA receive vs. 30mA, 14.1mA transmit vs. 149mA) compared to the 450-0076. The voltage supply range (1.7V ~ 3.6V) encompasses the original specification. Antenna interface differs (I-PEX vs. U.FL), requiring mechanical adapter consideration. RoHS compliance is maintained. This substitute is suitable for applications where multi-protocol capability and power efficiency provide design advantages.

For Minimal Feature Set Transition:

The 453-00021R represents an alternative with active product status and superior moisture sensitivity rating (MSL 1 vs. MSL 4). Limited technical parameters are provided for this variant. The nRF52840 IC and I-PEX MHF4 antenna interface align with the 451-00002 architecture. ROHS3 compliance exceeds RoHS requirements. Selection of this part requires confirmation of RF standard and protocol support through manufacturer documentation.

Compliance Considerations:

Both substitute parts maintain RoHS compliance required for regulatory alignment. The 451-00002 carries REACH Unaffected status. ECCN classifications differ between parts (5A992C for 450-0076 and 453-00021R; EAR99 for 451-00002), requiring export control verification for specific applications.

Frequently Asked Questions (FAQ)

Q: Can the 451-00002 directly replace the 450-0076 in existing designs?

A: The 451-00002 maintains 802.15.4 and 2.4GHz operation, supporting Zigbee® protocol compatibility. However, three factors require design consideration: (1) Antenna connector type differs (I-PEX vs. U.FL), necessitating mechanical adapter or PCB redesign; (2) Utilized IC differs (nRF52840 vs. CC2520), potentially affecting firmware compatibility and pin configuration; (3) Power consumption is substantially lower, which may require power supply circuit adjustment. Direct substitution without validation is not recommended.

Q: What are the key differences between 451-00002 and 453-00021R?

A: Both utilize the nRF52840 IC and operate at 2.4GHz. The 451-00002 provides documented multi-protocol support (802.15.4, Bluetooth v5.0, Thread) with specified electrical parameters. The 453-00021R offers superior moisture sensitivity (MSL 1 unlimited vs. MSL 4 72-hour), but limited technical specifications are provided. Antenna interface differs (I-PEX vs. I-PEX MHF4). Selection depends on application-specific requirements for protocol support and environmental exposure.

Q: Is antenna connector compatibility a critical substitution factor?

A: Yes. The 450-0076 uses U.FL connector, while both substitutes use I-PEX variants. These are mechanically incompatible. Substitution requires either: (1) PCB redesign to accommodate the new connector type; (2) use of mechanical adapter (with potential performance impact); (3) confirmation that antenna interface is not critical to the application. Connector selection affects RF performance and mechanical integration.

Q: What is the impact of different utilized ICs (CC2520 vs. nRF52840)?

A: The CC2520 is a dedicated 802.15.4 transceiver, while the nRF52840 is a multi-protocol SoC (System-on-Chip) with integrated ARM Cortex-M4 processor. This difference affects: (1) Firmware compatibility—existing CC2520 firmware requires porting to nRF52840; (2) Pin configuration and serial interface mapping; (3) Feature set—nRF52840 provides additional capabilities (Bluetooth, Thread, USB); (4) Power efficiency—nRF52840 demonstrates lower current consumption. Substitution requires firmware validation and integration testing.

Q: Are there voltage supply compatibility concerns?

A: The 450-0076 operates at 2V ~ 3.3V. The 451-00002 operates at 1.7V ~ 3.6V, providing broader range coverage. This is compatible for applications within the original 2V ~ 3.3V window. However, if the original design operates at the lower boundary (2V), confirmation that the 451-00002 functions reliably at this voltage is required. The 453-00021R voltage range is not specified, requiring manufacturer clarification.

Q: What is the significance of product status (Obsolete vs. Active)?

A: The 450-0076 is classified as obsolete, indicating discontinued production and limited future availability. The 451-00002 and 453-00021R are active products with ongoing manufacturing and supply chain support. For new designs or production transitions, active products are preferred to ensure long-term component availability and supply chain stability.

Q: How do RoHS and REACH compliance affect substitution decisions?

A: All parts maintain RoHS compliance, meeting hazardous substance restrictions. The 451-00002 carries REACH Unaffected status, indicating no REACH substance of concern. The 450-0076 and 453-00021R REACH status is not specified. For applications subject to REACH regulations, the 451-00002 provides documented compliance advantage. ECCN classifications differ (5A992C vs. EAR99), affecting export control requirements for specific jurisdictions.