ETRX2 802.15.4 Zigbee® Transceiver Module Equivalent & Substitute Parts

Part Overview

The ETRX2 is a Surface Mount RF transceiver module manufactured by Silicon Labs, designed for 802.15.4 Zigbee® wireless communication at 2.4GHz. This module integrates the EM250 IC with 128kB Flash and 5kB SRAM memory, operating across a 2.1V to 3.6V supply range. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and component procurement.

Substiute Parts

ETRX2

Silicon LabsIn Stock: 2382ETRX2 Datasheet

Current PartRFQ

ENW-C9A02A3E

Panasonic Electronic ComponentsIn Stock: 1089ENW-C9A02A3E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ETRX2 is determined by strict alignment across the following critical parameters:

• RF standard and protocol compatibility (802.15.4, Zigbee®)
• Operating frequency (2.4GHz)
• Data rate (250kbps)
• Power output (3dBm)
• Memory configuration (128kB Flash, 5kB SRAM minimum)
• Supply voltage range (2.1V ~ 3.6V)
• Mounting type (Surface Mount)
• Operating temperature range (-40°C ~ 85°C)
• Antenna integration (Chip-integrated)

The ENW-C9A02A3E from Panasonic Electronic Components meets all core electrical and mechanical substitution criteria. Both modules utilize the EM250 IC, maintain identical memory specifications, operate within the same voltage and temperature ranges, and support the same RF standard and data rate. Minor variations in receive/transmit current and sensitivity fall within acceptable operational tolerances for 802.15.4 applications.

Parameter Comparison

Engineering Selection Recommendations

The ENW-C9A02A3E is a direct functional substitute for the obsolete ETRX2. Both modules share identical core RF specifications, memory architecture, and operating parameters required for 802.15.4 Zigbee® applications.

Key selection factors:

• The ENW-C9A02A3E maintains active product status, ensuring ongoing availability and manufacturer support.
• ROHS3 compliance of the Panasonic module aligns with current environmental and regulatory standards.
• Transmit current is 6mA higher in the ENW-C9A02A3E (41.5mA vs. 35.5mA), requiring verification within system power budgets.
• Sensitivity difference of 1dB (-97dBm vs. -98dBm) is negligible for most 802.15.4 link budget calculations.
• The ENW-C9A02A3E provides explicit serial interface support (I2C, SPI, UART), offering enhanced integration flexibility.
• Moisture sensitivity level difference (MSL 1 vs. MSL 4) affects storage and handling requirements; the Panasonic module requires controlled humidity storage for 72 hours post-reflow.

Frequently Asked Questions (FAQ)

Q: Can the ENW-C9A02A3E directly replace the ETRX2 in existing designs?

A: Yes. Both modules meet identical 802.15.4 RF specifications, operate at 2.4GHz with 250kbps data rate, and share the same EM250 IC architecture. PCB footprint and pinout compatibility must be verified against design documentation.

Q: What is the significance of the 1dB sensitivity difference?

A: The ENW-C9A02A3E sensitivity of -97dBm versus the ETRX2 at -98dBm represents a 1dB reduction in receiver sensitivity. This difference is within typical 802.15.4 system margins and does not constitute a functional limitation for standard Zigbee® applications.

Q: How does the increased transmit current affect system design?

A: The ENW-C9A02A3E draws 41.5mA during transmission compared to 35.5mA for the ETRX2. This 6mA increase must be evaluated against system power supply capacity and battery life requirements. Thermal management and power distribution design may require review.

Q: What are the handling implications of the different Moisture Sensitivity Levels?

A: The ETRX2 (MSL 1) has unlimited shelf life under standard conditions. The ENW-C9A02A3E (MSL 4) requires storage in controlled humidity (≤60% RH) and must be reflowed within 72 hours of bag opening. Manufacturing and assembly processes must accommodate this requirement.

Q: Are the serial interfaces compatible?

A: The ENW-C9A02A3E explicitly supports I2C, SPI, and UART interfaces. The ETRX2 serial interface specification is not provided in available documentation. Interface compatibility must be confirmed against specific application requirements and existing firmware implementations.

Q: Is the ENW-C9A02A3E suitable for new designs?

A: Yes. The ENW-C9A02A3E is an active product with ROHS3 compliance, making it appropriate for new 802.15.4 Zigbee® designs requiring 2.4GHz operation, 250kbps data rate, and integrated chip antenna architecture.