ESP32-WROOM-32D-N4 Equivalent & Substitute Parts

Part Overview

The ESP32-WROOM-32D-N4 is a Bluetooth and WiFi 802.11b/g/n transceiver module manufactured by Espressif Systems, designed for integrated wireless communication applications operating in the 2.4GHz to 2.5GHz frequency band. This module integrates a trace antenna and supports Bluetooth v4.2 +EDR with Class 1, 2, and 3 capabilities, delivering 150Mbps data rate with -98dBm sensitivity.

The ESP32-WROOM-32D-N4 carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design continuity where existing inventory is depleted or unavailable.

Substiute Parts

ESP32-WROOM-32D-N4

Espressif SystemsIn Stock: 1048ESP32-WROOM-32D-N4 Datasheet

Current PartRFQ

ESP32-WROOM-32E-N4

Espressif SystemsIn Stock: 100894ESP32-WROOM-32E-N4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ESP32-WROOM-32D-N4 is determined by strict alignment across the following critical parameters:

RF Protocol and Frequency: Both the main part and substitute must support identical wireless protocols (Bluetooth v4.2 +EDR, WiFi 802.11b/g/n) and operate within the same 2.4GHz to 2.5GHz frequency band.

Modulation and Data Rate: CCK, DSSS, and OFDM modulation support with 150Mbps data rate must be maintained.

Antenna Configuration: Integrated trace antenna design must be preserved to ensure PCB layout compatibility.

Package and Mounting: 38-SMD Module surface mount package ensures mechanical and electrical compatibility with existing PCB designs.

Serial Interfaces: GPIO, I2C, I2S, PWM, SDIO, SPI, and UART interfaces must be available for functional equivalence.

Operating Conditions: Temperature range of -40°C to 85°C and voltage supply compatibility (2.7V ~ 3.6V minimum overlap) are required.

Compliance Standards: RoHS3 compliance and REACH unaffected status must be maintained for regulatory continuity.

Parameter Comparison

Engineering Selection Recommendations

The ESP32-WROOM-32E-N4 is the direct substitute for the ESP32-WROOM-32D-N4 based on the following engineering criteria:

Product Status Alignment: The ESP32-WROOM-32E-N4 carries an "Active" product status, ensuring ongoing manufacturer support, availability, and supply chain continuity compared to the "Not For New Designs" status of the original part.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, preserving regulatory requirements for existing applications.

Functional Equivalence: Identical RF protocols, frequency range, data rate, sensitivity, antenna configuration, and package form factor ensure direct PCB compatibility without layout modifications.

Interface Enhancement: The ESP32-WROOM-32E-N4 includes ADC interface capability in addition to the standard GPIO, I2C, I2S, PWM, SDIO, SPI, and UART interfaces, providing functional parity or enhancement.

Memory Expansion: The substitute part includes 4MB Flash memory in addition to the standard ROM and SRAM, offering increased program storage capacity without affecting core functionality.

Voltage Supply Consideration: The substitute part specifies a minimum supply voltage of 3V compared to 2.7V for the original part. Applications operating below 3V require validation against the substitute part's electrical specifications.

Power Output Variance: The substitute part delivers 20dBm output power compared to 20.5dBm for the original part, representing a 0.5dB reduction within typical RF module tolerance ranges.

Frequently Asked Questions (FAQ)

Q: Can the ESP32-WROOM-32E-N4 be used as a direct replacement for the ESP32-WROOM-32D-N4 in existing designs?

A: Yes, the ESP32-WROOM-32E-N4 is functionally equivalent for RF protocol, frequency, data rate, antenna type, and package configuration. However, applications requiring supply voltages below 3V must be evaluated against the substitute part's minimum voltage specification of 3V.

Q: What are the key differences between these two parts?

A: The primary differences are product status (Active vs. Not For New Designs), memory configuration (4MB Flash added in the substitute), available serial interfaces (ADC added in the substitute), and voltage supply minimum (3V vs. 2.7V). RF performance parameters including frequency, protocol, data rate, and sensitivity remain identical.

Q: Are there any PCB layout considerations when substituting the ESP32-WROOM-32E-N4 for the ESP32-WROOM-32D-N4?

A: No PCB layout modifications are required. Both parts use the 38-SMD Module package with identical form factor and integrated trace antenna configuration, ensuring direct mechanical and electrical compatibility.

Q: Does the 0.5dB difference in power output affect system performance?

A: The 0.5dB reduction in power output (20dBm vs. 20.5dBm) falls within standard RF module tolerance ranges and does not constitute a functional limitation for applications designed to the original part's specifications.

Q: What is the impact of the additional 4MB Flash memory in the ESP32-WROOM-32E-N4?

A: The additional 4MB Flash memory provides increased program storage capacity and does not affect compatibility. Existing firmware designed for the original part will operate on the substitute part without modification.

Q: Are moisture sensitivity and handling requirements identical between these parts?

A: Yes, both parts carry Moisture Sensitivity Level 3 (168 Hours), requiring identical storage, handling, and reflow procedures during assembly.