Equivalent & Substitute Parts for 450-0037R (TiWi-R2 Bluetooth/WiFi Transceiver Module)

Part Overview

The 450-0037R is a dual-band RF transceiver module manufactured by Laird Connectivity Inc., designed for Bluetooth and WiFi 802.11b/g/n applications in the 2.4GHz frequency band. This module integrates the WL1271 IC and operates as a Class 1.5 Bluetooth transceiver with surface mount packaging (52-SMD Module). The product is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing system designs and maintenance applications.

Substiute Parts

450-0037R

Laird Connectivity Inc.In Stock: 838450-0037R Datasheet

Current PartRFQ

ESP32-WROOM-32U-N4

Espressif SystemsIn Stock: 65282ESP32-WROOM-32U-N4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 450-0037R is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• RF Family/Standard: Bluetooth and WiFi capability required
• Frequency Band: 2.4GHz operation mandatory
• Modulation Support: CCK, GFSK, OFDM compatibility
• Antenna Interface: U.FL connector type
• Mounting: Surface mount configuration
• Serial Interfaces: SDIO and UART support
• Operating Temperature Range: -40°C to 85°C minimum
• Supply Voltage Compatibility: Overlap with 3V ~ 4.8V range

Secondary Compatibility Parameters:

• Data Rate: Minimum 65Mbps
• Power Output: Minimum 18.3dBm
• Sensitivity: -97dBm or better
• Package Type: SMD module format

The ESP32-WROOM-32U-N4 meets these substitution criteria through equivalent RF capabilities, compatible frequency operation, U.FL antenna interface, surface mount packaging, and overlapping operating specifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 450-0037R is classified as Obsolete. The ESP32-WROOM-32U-N4 is classified as Not For New Designs. For new system development, neither part is recommended for initial design entry. However, for legacy system maintenance, component replacement, or retrofit applications where the 450-0037R is no longer available, the ESP32-WROOM-32U-N4 provides functional equivalence.

Compliance and Certification: Both parts share identical ECCN (5A992C) and HTSUS (8517.62.0090) classifications, indicating regulatory equivalence for export and tariff purposes. The ESP32-WROOM-32U-N4 carries RoHS3 Compliance and REACH Unaffected certifications, providing enhanced environmental compliance documentation compared to the 450-0037R.

Electrical Performance: The ESP32-WROOM-32U-N4 demonstrates superior electrical performance across data rate (150Mbps vs. 65Mbps), power output (20.5dBm vs. 18.3dBm), and sensitivity (-98dBm vs. -97dBm). Supply voltage range is narrower (3V ~ 3.6V vs. 3V ~ 4.8V), requiring verification of system power architecture compatibility.

Physical Integration: Package form factor differs (38-SMD vs. 52-SMD), necessitating PCB layout redesign. Both modules employ U.FL antenna connectors and surface mount technology, maintaining mechanical interface compatibility at the connector level. Mounting footprint and board space requirements require evaluation during integration.

Interface Capability: The ESP32-WROOM-32U-N4 provides expanded serial interface options (GPIO, I2C, I2S, PWM, SDIO, SPI, UART) compared to the 450-0037R (SDIO, UART). This superset of interfaces enables enhanced system flexibility without compromising existing SDIO/UART communication protocols.

Frequently Asked Questions (FAQ)

Q: Can the ESP32-WROOM-32U-N4 directly replace the 450-0037R without PCB modification?

A: No. While both modules are surface mount with U.FL antenna connectors, the package form factor differs (38-SMD vs. 52-SMD Module). PCB layout redesign is required to accommodate the different footprint. Electrical connections (SDIO, UART, power, ground) must be verified for compatibility with existing circuit topology.

Q: What is the impact of the narrower supply voltage range (3V ~ 3.6V) on the ESP32-WROOM-32U-N4?

A: The 450-0037R operates across 3V ~ 4.8V, while the ESP32-WROOM-32U-N4 operates across 3V ~ 3.6V. If the original system supplies voltage above 3.6V, the substitute part cannot be used without power regulation modifications. Verify system power supply specifications before substitution.

Q: Are the Bluetooth and WiFi protocols compatible between these modules?

A: Both modules support 802.11b/g/n WiFi and Bluetooth protocols. The 450-0037R implements Bluetooth v2.1 +EDR (Class 1.5), while the ESP32-WROOM-32U-N4 implements Bluetooth v4.2 +EDR (Class 1, 2, 3). The newer Bluetooth version in the substitute part is backward compatible with v2.1 +EDR applications, but firmware and driver updates may be necessary.

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

A: The 450-0037R has MSL 4 (72 Hours), while the ESP32-WROOM-32U-N4 has MSL 3 (168 Hours). MSL 3 indicates lower moisture sensitivity and longer shelf life before reflow soldering. This represents an improvement in handling and storage requirements for the substitute part.

Q: Do both modules require external antennas?

A: Yes. Both the 450-0037R and ESP32-WROOM-32U-N4 are specified as "Antenna Not Included" with U.FL connectors. External antenna selection and integration are required for both modules. Antenna compatibility must be verified independently of module substitution.

Q: What is the significance of the different ECCN classifications?

A: Both parts share the same ECCN (5A992C), indicating identical export control classification. No additional export documentation or licensing changes are required when substituting between these parts.

Q: Are firmware and software drivers interchangeable?

A: No. The 450-0037R uses the WL1271 IC, while the ESP32-WROOM-32U-N4 uses the ESP32-D0WD IC. Firmware, drivers, and software libraries are specific to each platform and are not interchangeable. Complete software stack evaluation and porting is required.

Q: What is the difference in memory between these modules?

A: The 450-0037R does not specify memory size in the provided parameters. The ESP32-WROOM-32U-N4 includes 4MB Flash, 448kB ROM, and 536kB SRAM. This additional memory capacity in the substitute part may enable enhanced application functionality but requires software architecture compatibility verification.