IMP002-S-US-TR WiFi 802.11b/g/n Transceiver Module Equivalent & Substitute Parts

Part Overview

The IMP002-S-US-TR is a WiFi 802.11b/g/n transceiver module manufactured by Electric Imp Inc., designed for 2.4GHz integrated trace antenna surface mount applications. This module integrates RF transmission and reception capabilities with serial interface support (I2C, SPI, UART) for embedded WiFi connectivity.

The IMP002-S-US-TR is classified as Obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. The substitute parts listed below provide functional equivalence based on RF protocol compatibility, frequency band alignment, serial interface support, and surface mount packaging.

Key Parameters

Parameter	IMP002-S-US-TR
RF Family/Standard	WiFi
Protocol	802.11b/g/n
Frequency	2.4GHz
Data Rate	1Mbps
Power - Output	16.5dBm
Sensitivity	-97dBm
Serial Interfaces	I2C, SPI, UART
Antenna Type	Integrated, Trace
Voltage - Supply	1.8V ~ 3.6V
Mounting Type	Surface Mount
Operating Temperature	-20°C ~ 55°C
Package / Case	35-SMD Module
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

RF Family/Standard: WiFi
Protocol: 802.11b/g/n (minimum requirement)
Frequency: 2.4GHz
Mounting Type: Surface Mount
Serial Interfaces: Minimum support for SPI and UART (I2C support preferred)
Antenna Type: Integrated, Trace (preferred for direct replacement)

Grouping Logic:

Group 1 - Direct Surface Mount Replacements with Integrated Trace Antenna: ATSAMW25H18-MR210PB, ATWINC1500-MR210PB, ATWINC1510-MR210PB1952, RN1810-I/RM110, WYSACVLXY-XZ

These parts maintain surface mount packaging and integrated trace antenna configuration, providing direct mechanical and electrical compatibility with the IMP002-S-US-TR footprint.

Group 2 - Surface Mount with External Antenna Connector: ATWINC1500-MR210UB

This part uses U.FL antenna connector instead of integrated trace antenna, requiring external antenna provision and PCB layout modification.

Group 3 - Through Hole Mounting (Non-Direct Replacement): MIKROE-496, MOD-WIFI-ESP8266

These parts use through-hole mounting and are not direct mechanical replacements but provide functional WiFi 802.11b/g/n capability for redesigned applications.

Parameter Comparison

Parameter	IMP002-S-US-TR	ATSAMW25H18-MR210PB	ATWINC1500-MR210PB	ATWINC1500-MR210UB	ATWINC1510-MR210PB1952	RN1810-I/RM110
Manufacturer	Electric Imp Inc.	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Protocol	802.11b/g/n	802.11b/g/n	802.11b/g/n	802.11b/g/n	802.11b/g/n	802.11b/g/n
Frequency	2.4GHz	2.4GHz	2.4GHz	2.4GHz	2.4GHz	2.4GHz
Data Rate	1Mbps	72.2Mbps	72.2Mbps	72.2Mbps	72.2Mbps	54Mbps
Power - Output	16.5dBm	18.5dBm	18.5dBm	19.5dBm	18.5dBm	18dBm
Sensitivity	-97dBm	-98dBm	-95dBm	-98dBm	-95dBm	-94dBm
Serial Interfaces	I2C, SPI, UART	SPI, UART	I2C, SPI, UART	I2C, SPI, UART	I2C, SPI, UART	UART
Antenna Type	Integrated, Trace	Integrated, Trace	Integrated, Trace	Antenna Not Included, U.FL	Integrated, Trace	Integrated, Trace
Voltage - Supply	1.8V ~ 3.6V	3V ~ 4.3V	2.7V ~ 3.6V	3V ~ 4.2V	2.7V ~ 3.6V	3.3V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-20°C ~ 55°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	35-SMD Module	Module	Module	Module	Module	37-SMD Module
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For Direct Surface Mount Replacement (No PCB Redesign):

The ATWINC1500-MR210PB and ATWINC1510-MR210PB1952 are the primary recommended substitutes. Both parts are manufactured by Microchip Technology with Active product status, ensuring long-term supply availability. These modules support the full serial interface set (I2C, SPI, UART) required by the IMP002-S-US-TR, maintain integrated trace antenna configuration, and operate within compatible voltage supply ranges (2.7V ~ 3.6V). Both are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements.

The ATWINC1510-MR210PB1952 provides enhanced memory capacity (8MB Flash vs. 4MB Flash) and firmware version 19.5.2, offering improved performance for memory-intensive applications. The ATWINC1500-MR210PB provides equivalent core functionality with firmware version 19.4.4 and is available in higher inventory quantities (2200 Pcs).

For Applications Requiring Extended Temperature Range:

All recommended Microchip Technology substitutes operate across -40°C ~ 85°C, exceeding the IMP002-S-US-TR operating range of -20°C ~ 55°C. This provides enhanced reliability for industrial and extended-temperature applications.

For Applications Requiring External Antenna:

The ATWINC1500-MR210UB provides U.FL antenna connector configuration, enabling external antenna selection. This variant requires PCB layout modification to accommodate the antenna connector and external antenna component.

For Through-Hole Mounting Applications:

The MOD-WIFI-ESP8266 (Olimex LTD) provides WiFi 802.11b/g/n functionality with through-hole mounting, suitable for breadboard prototyping and applications requiring non-surface-mount integration. This part requires complete PCB redesign and is not a direct mechanical replacement.

Compliance and Certification:

All active substitute parts maintain ROHS3 Compliance and REACH Unaffected status, ensuring compatibility with current environmental and regulatory standards. The IMP002-S-US-TR compliance status is not specified; verification with design documentation is recommended before final part selection.

Frequently Asked Questions (FAQ)

Q1: Can ATWINC1500-MR210PB directly replace IMP002-S-US-TR without PCB modification?

A: The ATWINC1500-MR210PB maintains surface mount packaging and integrated trace antenna configuration, providing mechanical compatibility. However, package footprint verification is required. The IMP002-S-US-TR uses 35-SMD Module packaging while ATWINC1500-MR210PB uses generic Module packaging. Detailed footprint drawings must be compared to confirm pin-for-pin compatibility and PCB land pattern alignment.

Q2: What are the voltage supply differences between IMP002-S-US-TR and substitute parts?

A: The IMP002-S-US-TR operates at 1.8V ~ 3.6V supply voltage. Microchip Technology substitutes operate at 2.7V ~ 3.6V (ATWINC1500-MR210PB, ATWINC1510-MR210PB1952) or 3V ~ 4.3V (ATSAMW25H18-MR210PB). Designs operating at 1.8V ~ 2.7V require voltage regulation or alternative part selection. The RN1810-I/RM110 operates at fixed 3.3V supply.

Q3: Which substitute part provides the best performance upgrade?

A: The ATWINC1510-MR210PB1952 provides the highest performance specification with 72.2Mbps data rate, 8MB Flash memory (vs. 1Mbps and unspecified memory for IMP002-S-US-TR), and firmware version 19.5.2. The ATWINC1500-MR210PB provides equivalent core performance with 4MB Flash memory and firmware version 19.4.4.

Q4: Are serial interface differences significant for substitution?

A: The IMP002-S-US-TR supports I2C, SPI, and UART. The ATSAMW25H18-MR210PB supports only SPI and UART, lacking I2C support. If I2C communication is required by the application, ATSAMW25H18-MR210PB is not suitable. The ATWINC1500-MR210PB, ATWINC1500-MR210UB, and ATWINC1510-MR210PB1952 support the complete interface set. The RN1810-I/RM110 supports only UART, limiting application flexibility.

Q5: What is the difference between ATWINC1500-MR210PB and ATWINC1500-MR210UB?

A: The ATWINC1500-MR210PB features integrated trace antenna, while ATWINC1500-MR210UB uses U.FL antenna connector requiring external antenna provision. The ATWINC1500-MR210UB provides higher output power (19.5dBm vs. 18.5dBm) and wider current receiving range (52.5mA ~ 70.1mA vs. fixed specification). U.FL configuration requires PCB redesign and external antenna component selection.

Q6: Can through-hole modules (MIKROE-496, MOD-WIFI-ESP8266) substitute for surface mount IMP002-S-US-TR?

A: Through-hole modules are not direct mechanical replacements for surface mount applications. These parts require complete PCB redesign with through-hole mounting holes and different land patterns. They are suitable only for applications undergoing redesign or prototyping phases. The MOD-WIFI-ESP8266 provides enhanced functionality (I2C, SDIO, SPI, UART support) compared to MIKROE-496 (SPI, UART only).

Q7: What inventory considerations apply to substitute part selection?

A: Current inventory levels are: ATWINC1510-MR210PB1952 (5530 Pcs), ATWINC1500-MR210PB (2200 Pcs), ATWINC1500-MR210UB (2100 Pcs), ATSAMW25H18-MR210PB (1890 Pcs), WYSACVLXY-XZ (734 Pcs), RN1810-I/RM110 (820 Pcs), MOD-WIFI-ESP8266 (1062 Pcs), MIKROE-496 (1055 Pcs). The ATWINC1510-MR210PB1952 provides the highest inventory availability for high-volume production requirements.

Q8: Are there regulatory or compliance differences between substitute parts?

A: All active substitute parts are ROHS3 Compliant and REACH Unaffected. ECCN classifications vary: IMP002-S-US-TR (5A991B), ATSAMW25H18-MR210PB (5A992C), ATWINC series (5A992C), RN1810-I/RM110 (5A992C), MOD-WIFI-ESP8266 (5A992C), MIKROE-496 (5A002A1), WYSACVLXY-XZ (5A002A1). Export control classification verification is required for international distribution.

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