WiFi 802.11b/g/n Transceiver Module 114990085 Equivalent & Substitute Parts

Part Overview

The Seeed Technology Co., Ltd model 114990085 is a WiFi 802.11b/g/n transceiver module operating at 2.4GHz with through-hole mounting. This module integrates an ESP8266 IC and provides serial communication via SPI and UART interfaces. The product is currently classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement.

Substiute Parts

114990085

Seeed Technology Co., LtdIn Stock: 928114990085 Datasheet

Current PartRFQ

317060016

Seeed Technology Co., LtdIn Stock: 1189317060016 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 114990085 is determined by strict alignment of the following critical parameters:

Core Compatibility Criteria:

• RF Family/Standard: WiFi
• Protocol: 802.11b/g/n
• Frequency: 2.4GHz band
• Utilized IC: ESP8266
• Voltage - Supply: 3.3V
• Mounting Type: Through Hole
• Serial Interfaces: UART (minimum requirement)

The substitute part 317060016 meets all core compatibility criteria. Both modules utilize the ESP8266 IC, operate at 3.3V supply voltage, support 802.11b/g/n protocol, and employ through-hole mounting. The substitute maintains UART serial interface capability, which is the common interface between both parts.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The 317060016 is a valid substitute for the obsolete 114990085 based on core RF and electrical parameters. Both modules share the same ESP8266 IC, 3.3V supply voltage, 802.11b/g/n protocol support, and through-hole mounting configuration.

Key Considerations:

1. Serial Interface Limitation: The substitute part 317060016 supports UART interface only, whereas the original 114990085 provides both SPI and UART. Applications requiring SPI communication must be redesigned to use UART or an alternative part must be sourced.

2. Transmit Power Differential: The substitute operates at 15dBm output power compared to the original 19.5dBm. This 4.5dB reduction may impact link budget in range-limited applications. System-level RF analysis is required if maximum transmit power is a design constraint.

3. Receive Current Improvement: The substitute draws 62mA during receive operations versus 215mA for the original part, representing a 71% reduction in receive current consumption. This provides significant power efficiency benefits for battery-powered applications.

4. Product Status and Compliance: The substitute 317060016 is actively manufactured and RoHS compliant, ensuring long-term availability and regulatory compliance. The original part is obsolete and no longer in production.

5. Antenna Configuration: The substitute features an integrated trace antenna, whereas the original part does not specify antenna type. This may affect PCB layout requirements and RF performance characteristics.

6. Operating Temperature Range: The substitute specifies -20°C to 100°C operating temperature, providing defined thermal performance parameters absent from the original part specification.

Frequently Asked Questions (FAQ)

Q1: Can the 317060016 directly replace the 114990085 without any design modifications?

A: Direct replacement is possible if your application uses UART serial communication exclusively. If your design requires SPI interface, firmware or hardware modifications are necessary to implement SPI-to-UART protocol conversion or alternative communication methods.

Q2: What is the impact of the 4.5dB lower transmit power on system performance?

A: The 4.5dB power reduction corresponds to approximately 65% of the original transmit power. In free-space propagation, this reduces communication range by approximately 30%. Conduct link budget analysis for your specific application to determine if this reduction is acceptable.

Q3: Are there any PCB layout differences between the two modules?

A: The original 114990085 uses an 8-DIP package format, while the 317060016 is specified as a Module package. Physical dimensions and pinout may differ. Verify mechanical compatibility and pinout alignment before PCB redesign.

Q4: Does the integrated trace antenna on the 317060016 affect RF performance compared to the original part?

A: The integrated trace antenna on the 317060016 provides a fixed antenna solution, eliminating the need for external antenna components. This may simplify PCB design but could affect radiation pattern and gain characteristics compared to the original design. RF performance validation is required for your specific application.

Q5: What are the advantages of using the 317060016 substitute?

A: The substitute offers active product status with ongoing manufacturer support, RoHS compliance for regulatory requirements, 71% lower receive current consumption for improved power efficiency, and specified operating temperature range (-20°C to 100°C) for thermal design confidence.

Q6: Is the 317060016 suitable for new product designs?

A: Yes. The 317060016 is actively manufactured and recommended for new designs requiring WiFi 802.11b/g/n connectivity with ESP8266 IC. Ensure your application requirements align with UART-only serial interface and 15dBm transmit power specifications.

Q7: What is the inventory status of these parts?

A: The original 114990085 has 917 pieces in stock but is obsolete. The substitute 317060016 has 1107 pieces in stock and is actively produced, ensuring long-term availability for production and support requirements.