SDC-MSD40NBT RF TXRX Module Equivalent & Substitute Parts

Part Overview

The SDC-MSD40NBT is an RF transceiver module manufactured by Laird Connectivity Inc., designed for WiFi 802.11a/b/g/n and Bluetooth v2.1 +EDR applications operating at 2.4GHz. The module features a U.FL surface mount antenna connector and integrates the Broadcom BCM4329 IC. With a data rate of 72.2Mbps, output power of 17dBm, and receiver sensitivity of -96dBm, this module is suitable for embedded wireless communication systems requiring dual-protocol support.

The SDC-MSD40NBT is classified as Obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

SDC-MSD40NBT

Laird Connectivity Inc.In Stock: 1255SDC-MSD40NBT Datasheet

Current PartRFQ

WH-MSD50NBT

Laird Connectivity Inc.In Stock: 810WH-MSD50NBT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDC-MSD40NBT are identified based on the following critical parameters that determine functional and mechanical compatibility:

RF Protocol Compatibility: The substitute must support WiFi 802.11a/b/g/n and Bluetooth protocols to maintain backward compatibility with existing system designs.

Frequency Band: Operation within the 2.4GHz band is essential for interoperability with legacy wireless networks and devices.

Physical Form Factor: Surface mount packaging with 60-SMD module configuration ensures mechanical compatibility with existing PCB layouts.

Power Output and Sensitivity: Output power of 17dBm and receiver sensitivity within acceptable range (-92dBm to -96dBm) maintain link budget performance.

Supply Voltage Compatibility: The substitute must operate at 3.3V or support 3.3V as a selectable supply voltage option to integrate with existing power distribution systems.

Serial Interface Support: UART interface support ensures compatibility with existing firmware and host processor communication protocols.

Antenna Connector: U.FL surface mount antenna connector maintains mechanical and electrical compatibility with existing antenna assemblies.

The WH-MSD50NBT meets these substitution criteria while offering enhanced capabilities including Bluetooth v4.0 Dual Mode support, extended frequency range (5.15GHz ~ 5.825GHz), and additional serial interfaces (I2S, PCM, SDIO, USB).

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SDC-MSD40NBT is classified as Obsolete, making long-term component availability uncertain. The WH-MSD50NBT is classified as Active, ensuring continued availability and supply chain support.

Compliance and Certification: The WH-MSD50NBT is RoHS3 Compliant, meeting current environmental and regulatory requirements for new designs and system updates. The SDC-MSD40NBT compliance status is not specified in the provided data.

Backward Compatibility: Both modules share identical package form factors (60-SMD Module), surface mount antenna connector types, and 3.3V supply voltage support, enabling direct substitution in existing PCB layouts without redesign.

Protocol Support: The WH-MSD50NBT supports Bluetooth v4.0 Dual Mode, providing enhanced backward compatibility with Bluetooth v2.1 +EDR devices while enabling integration with modern Bluetooth Low Energy (BLE) applications.

Frequency Band Extension: The WH-MSD50NBT extends frequency coverage to 5.15GHz ~ 5.825GHz, supporting 802.11a/n operation for improved data rates and reduced interference in congested 2.4GHz environments.

Interface Flexibility: The WH-MSD50NBT provides multiple serial interface options (I2S, PCM, SDIO, UART, USB) compared to the SDC-MSD40NBT's UART-only support, offering greater integration flexibility for new system designs.

Frequently Asked Questions (FAQ)

Q: Can the WH-MSD50NBT directly replace the SDC-MSD40NBT in existing designs?

A: Yes, for applications requiring only 2.4GHz WiFi 802.11b/g/n and Bluetooth v2.1 +EDR functionality. Both modules share identical 60-SMD package form factors, 3.3V supply voltage support, and U.FL antenna connectors. Firmware compatibility must be verified with the host processor and application software.

Q: What are the key differences between the SDC-MSD40NBT and WH-MSD50NBT?

A: The WH-MSD50NBT supports Bluetooth v4.0 Dual Mode (versus v2.1 +EDR), extends frequency coverage to 5GHz band, provides additional serial interfaces (I2S, PCM, SDIO, USB), and is classified as Active product status with RoHS3 compliance. The SDC-MSD40NBT offers higher data rate (72.2Mbps versus 54Mbps) and lower receiver sensitivity (-96dBm versus -92dBm).

Q: Are there packaging differences between these modules?

A: Both modules use 60-SMD surface mount package configuration. The WH-MSD50NBT is supplied in Tray packaging, while the SDC-MSD40NBT packaging specification is not provided. Both are suitable for automated PCB assembly processes.

Q: What supply voltage options are available?

A: The SDC-MSD40NBT operates at 3.3V only. The WH-MSD50NBT supports both 1.8V and 3.3V supply voltages, providing flexibility for integration with different power distribution architectures.

Q: How do the current consumption profiles compare?

A: The SDC-MSD40NBT draws 92mA in receive mode and 270mA ~ 314mA in transmit mode. The WH-MSD50NBT draws 70mA ~ 120mA in receive mode and 85mA ~ 600mA in transmit mode. Peak transmit current is higher for the WH-MSD50NBT, requiring adequate power supply capacity.

Q: Is the WH-MSD50NBT suitable for legacy Bluetooth v2.1 +EDR applications?

A: Yes. The WH-MSD50NBT supports Bluetooth v4.0 Dual Mode, which maintains backward compatibility with Bluetooth v2.1 +EDR devices while enabling modern BLE functionality.

Q: What is the operating temperature range difference?

A: The SDC-MSD40NBT operates from -30°C to 80°C. The WH-MSD50NBT extends the upper limit to 85°C, providing 5°C additional thermal margin for high-temperature environments.