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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas AT25XE041B-MHN-Y

Name: AT25XE041B-MHN-Y
Brand: Renesas
SKU: AT25XE041B-MHN-Y
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT25XE041B-MHN-Y

Manufacturer:: Renesas

Category:: Memory

Package:: 8-UDFN Exposed Pad

Datasheet:: AT25XE041B-MHN-Y.pdf

Description:: IC FLASH 4MBIT SPI 85MHZ 8UDFN

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Product details

Overview

AT25XE041B-MHN-Y from Renesas Electronics is a 4-Mbit serial SPI Flash memory IC supporting Dual-I/O operation, 85 MHz max clock frequency, 1.65–3.6 V supply, and industrial temperature range (−40°C to +85°C). It features 256-byte page erase, 4/32/64-kByte uniform block erase, hardware write protection via WP pin, and a 128-byte OTP security register with factory-programmed unique ID-used in embedded boot code storage and firmware update systems.

For engineers reviewing the AT25XE041B-MHN-Y datasheet, AT25XE041B-MHN-Y pinout, AT25XE041B-MHN-Y application, or AT25XE041B-MHN-Y equivalent, key selection considerations include SPI Mode 0/3 compatibility, ultra-low 200 nA deep power-down current, dual-input programming capability, sector protection granularity, and JEDEC-standard manufacturer/device ID read support.

Technical Context

The AT25XE041B-MHN-Y implements a flexible hierarchical erase architecture with four distinct erase granularities (256-Byte page, 4-kByte block, 32-kByte block, 64-kByte block, and full chip), enabling efficient co-location of code and data without memory waste. Its Dual-I/O mode doubles read throughput by outputting two bits per SCK falling edge using SI (I/O0) and SO (I/O1).

It integrates hardware-controlled write protection via the active-low WP pin and software-configurable sector locking through status register bits. The device supports sequential program mode with automatic status polling and includes an active status interrupt for asynchronous operation completion signaling.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	4 Mbit (512 kByte) - sufficient for boot code, firmware images, and configuration data in resource-constrained embedded systems.
Interface	SPI-compatible, Modes 0 and 3 - ensures interoperability with standard microcontroller SPI peripherals without custom timing logic.
Max Clock Frequency	85 MHz - enables fast read access with 6 ns clock-to-output delay, reducing CPU wait states during code shadowing.
Erase Granularity	256-Byte page + 4/32/64-kByte uniform blocks - allows fine-grained firmware patching and robust partitioning of code vs. runtime data.
Supply Voltage	1.65 V to 3.6 V - supports direct integration into 1.8 V and 3.3 V I/O domains without level-shifting circuitry.
Power Consumption	200 nA ultra-deep power-down current - extends battery life in always-on IoT endpoints during extended sleep cycles.
Data Retention	20 years - guarantees long-term reliability for field-deployed devices without periodic refresh or reprogramming.
Endurance	100,000 program/erase cycles (−40°C to +85°C) - supports frequent over-the-air (OTA) firmware updates in industrial gateways.

Pinout & Package

AT25XE041B-MHN-Y is packaged in an 8-lead SOIC (150-mil) with standard pinout compatible with JEDEC MS-012. This package supports reflow soldering and offers mechanical robustness for industrial PCB assembly.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-low enable signal; rising edge terminates commands and places SO in high-Z - essential for multi-device SPI bus sharing.
SCK	Serial Clock	Master-generated clock; data latched on rising edge (SI), output shifted on falling edge (SO) - defines timing boundaries for all SPI transactions.
SI (I/O0)	Serial Input / Dual-I/O Data 0	Primary command/address/data input; becomes bidirectional I/O0 in Dual-I/O mode - enables 2-bit-per-cycle reads for bandwidth-critical applications.
SO (I/O1)	Serial Output / Dual-I/O Data 1	Standard output for read data; remains active I/O1 in Dual-I/O mode - pairs with SI to deliver concurrent bitstream for accelerated firmware loading.
WP	Write Protect	Hardware lock control; low assertion disables all write/erase commands - provides tamper-resistant protection for bootloader sectors.
HOLD	Hold Control	Pauses ongoing SPI transfer without deselecting device; requires CS low and SCK low - preserves transaction state during CPU interrupts or priority task preemption.
VCC	Power Supply	Single 1.65–3.6 V rail powers core logic and memory array - eliminates need for charge pumps or auxiliary voltage rails.
GND	Ground Reference	Common return path for all internal circuits - must be low-impedance connection to minimize noise coupling into sensitive analog timing paths.

Key Features

Feature	Design Value
Dual-I/O Read Operation	Delivers 2 bits per SCK falling edge, doubling effective read bandwidth versus standard SPI - critical for fast boot time in real-time systems.
128-Byte OTP Security Register	64 bytes factory-programmed unique identifier + 64 bytes user-programmable - enables secure device authentication and ESN binding without external crypto ICs.
Flexible Erase Architecture	Supports page (256 B), 4-kB, 32-kB, 64-kB, and full-chip erase - minimizes wasted space when updating partial firmware modules or logging data segments.
Ultra-Deep Power-Down Mode	200 nA typical current draw - reduces standby power by >99% compared to active read mode, extending shelf life and battery runtime.
Hardware + Software Sector Protection	WP pin locks protected sectors unconditionally; status register bits allow dynamic software-based locking - layered security for bootloader and calibration data.
JEDEC Standard ID Read	Manufacturer and device ID accessible via standardized opcodes (90h/ABh) - simplifies automated BOM verification and supply-chain traceability.

Applications

Industrial PLC Firmware Storage	Automotive Infotainment Boot Memory
Use Scenario: Storing and executing boot firmware and safety-critical control logic in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile boot memory providing reliable code shadowing into RAM at power-up; supports in-field firmware updates via secure OTA channels. Use Value: 100,000 P/E cycles and 20-year data retention ensure multi-decade operational integrity without field replacement; hardware WP pin prevents accidental corruption during brown-out events.	Use Scenario: Holding primary bootloader and certified infotainment OS image in automotive head units requiring AEC-Q100 alignment and functional safety compliance. IC Role / Device Role / Timing Role: SPI-connected code storage device interfacing directly with application processor's boot ROM; leverages 85 MHz read speed for sub-500 ms cold boot. Use Value: Dual-I/O read mode accelerates image loading; OTP register stores vehicle-specific VIN-linked keys for secure boot chain validation.
Smart Meter Configuration Storage	Medical Wearable Sensor Calibration Data
Use Scenario: Retaining tariff tables, communication profiles, and metering calibration parameters across power cycles and firmware upgrades in ANSI C12.19-compliant smart electricity meters. IC Role / Device Role / Timing Role: Dedicated non-volatile parameter storage with atomic 256-byte page writes - avoids partial-write corruption during grid instability events. Use Value: 4-kByte uniform block erase enables safe overwriting of entire tariff sets; ultra-deep power-down (200 nA) extends battery backup life beyond 10 years.	Use Scenario: Storing factory-calibrated sensor coefficients and patient-specific thresholds in ISO 13485-certified wearable ECG monitors with strict power budget constraints. IC Role / Device Role / Timing Role: Low-power configuration memory accessed only during initialization or recalibration routines - operates within 1.8 V system rail without voltage translation. Use Value: 1.65 V minimum VCC allows direct connection to coin-cell-supplied subsystems; OTP register holds cryptographic keys for HIPAA-compliant data encryption.

Industrial PLC Firmware Storage

Automotive Infotainment Boot Memory

Use Scenario: Storing and executing boot firmware and safety-critical control logic in programmable logic controllers deployed in factory automation environments.

IC Role / Device Role / Timing Role: Non-volatile boot memory providing reliable code shadowing into RAM at power-up; supports in-field firmware updates via secure OTA channels.

Use Value: 100,000 P/E cycles and 20-year data retention ensure multi-decade operational integrity without field replacement; hardware WP pin prevents accidental corruption during brown-out events.

Use Scenario: Holding primary bootloader and certified infotainment OS image in automotive head units requiring AEC-Q100 alignment and functional safety compliance.

IC Role / Device Role / Timing Role: SPI-connected code storage device interfacing directly with application processor's boot ROM; leverages 85 MHz read speed for sub-500 ms cold boot.

Use Value: Dual-I/O read mode accelerates image loading; OTP register stores vehicle-specific VIN-linked keys for secure boot chain validation.

Smart Meter Configuration Storage

Medical Wearable Sensor Calibration Data

Use Scenario: Retaining tariff tables, communication profiles, and metering calibration parameters across power cycles and firmware upgrades in ANSI C12.19-compliant smart electricity meters.

IC Role / Device Role / Timing Role: Dedicated non-volatile parameter storage with atomic 256-byte page writes - avoids partial-write corruption during grid instability events.

Use Value: 4-kByte uniform block erase enables safe overwriting of entire tariff sets; ultra-deep power-down (200 nA) extends battery backup life beyond 10 years.

Use Scenario: Storing factory-calibrated sensor coefficients and patient-specific thresholds in ISO 13485-certified wearable ECG monitors with strict power budget constraints.

IC Role / Device Role / Timing Role: Low-power configuration memory accessed only during initialization or recalibration routines - operates within 1.8 V system rail without voltage translation.

Use Value: 1.65 V minimum VCC allows direct connection to coin-cell-supplied subsystems; OTP register holds cryptographic keys for HIPAA-compliant data encryption.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial flash memory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Winbond W25Q40EW	4 Mbit density, 1.7–2.0 V supply range only; no OTP register; 133 MHz max clock; 1.6 mm × 2.1 mm DFN package option.	Lacks factory-programmed unique ID and ultra-deep power-down mode; optimized for higher-speed consumer applications rather than industrial longevity.	Select when maximum read bandwidth is prioritized over 20-year retention and cryptographic identity binding.
Macronix MX25L4033F	4 Mbit density, 2.7–3.6 V supply only; no Dual-I/O mode; 100,000 P/E cycles; 8-pin SOIC package available.	Requires 2.7 V minimum - incompatible with 1.8 V systems; lacks hardware-accelerated dual-bit read and OTP security features.	Choose for cost-sensitive legacy 3.3 V designs where Dual-I/O and security are not required.

Compared with W25Q40EW and MX25L4033F, the AT25XE041B-MHN-Y uniquely combines ultra-low-voltage operation (1.65 V), integrated OTP identity, and Dual-I/O throughput - making it optimal for next-generation battery-powered and safety-critical embedded systems requiring both longevity and secure boot capability.

Availability

AT25XE041B-MHN-Y is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot memory, and smart meter configuration storage requiring stable component supply across extended product lifecycles.

Supply support for AT25XE041B-MHN-Y includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT applications.

The AT25XE041B belongs to Renesas' serial Flash memory product line, engineered specifically for high-reliability embedded systems demanding secure, low-voltage, and long-life non-volatile storage in constrained physical and power envelopes.

FAQ

What is the operating voltage range supported by the AT25XE041B-MHN-Y?

The AT25XE041B-MHN-Y supports a single-supply operating voltage range of 1.65 V to 3.6 V across the full industrial temperature range (−40°C to +85°C). This wide range enables direct interface with both 1.8 V and 3.3 V microcontroller I/O domains without level shifters. The AT25XE041B-MHN-Y does not require separate programming or erase voltages - all operations execute from the same VCC rail.

Does the AT25XE041B-MHN-Y support Dual-I/O read mode, and how does it improve performance?

Yes, the AT25XE041B-MHN-Y supports Dual-I/O read mode using SI (I/O0) and SO (I/O1) pins to output two bits per SCK falling edge. This doubles effective read bandwidth versus standard SPI, reducing firmware load time significantly. The AT25XE041B-MHN-Y achieves 85 MHz max clock frequency with 6 ns clock-to-output delay, making it ideal for fast boot and real-time code shadowing applications.

How is hardware write protection implemented on the AT25XE041B-MHN-Y?

Hardware write protection on the AT25XE041B-MHN-Y is controlled by the active-low WP pin. When asserted low, the WP pin unconditionally locks protected sectors regardless of software status register settings - preventing accidental or malicious modification during power transients or firmware faults. The AT25XE041B-MHN-Y also supports software-based sector protection via status register bits for flexible, dynamic locking schemes.

What is the purpose and structure of the OTP security register in the AT25XE041B-MHN-Y?

The AT25XE041B-MHN-Y includes a 128-byte One-Time Programmable (OTP) security register: 64 bytes are factory-programmed with a unique device identifier, and 64 bytes are user-programmable for keys, certificates, or calibration data. Once written, OTP contents cannot be altered - ensuring immutable device identity and secure key storage. This eliminates the need for external secure elements in cost-sensitive designs requiring cryptographic binding.

What erase granularities does the AT25XE041B-MHN-Y support, and why does that matter for embedded firmware design?

The AT25XE041B-MHN-Y supports five erase granularities: 256-byte page, 4-kByte block, 32-kByte block, 64-kByte block, and full-chip erase. This flexibility allows precise allocation of code modules and data segments into independent erase regions - avoiding the memory waste common with fixed-large-block Flash. For embedded firmware, this means faster OTA updates, reduced risk of corruption during partial writes, and efficient use of the full 4-Mbit capacity without over-provisioning.

AT25XE041B-MHN-Y Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 8-UDFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH

Memory Size:: 4Mbit

Memory Organization:: 512K x 8

Memory Interface:: SPI

Clock Frequency:: 85 MHz

Write Cycle Time - Word, Page:: 8µs, 2.75ms

Access Time:: -

Voltage - Supply:: 1.65V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TC)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-UDFN (5x6)

AT25XE041B-MHN-Y FAQ

1.How can I place an order for AT25XE041B-MHN-Y through Aetrix?

Please submit a Request for Quotation (RFQ) for AT25XE041B-MHN-Y on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AT25XE041B-MHN-Y reliable?

The price and inventory of AT25XE041B-MHN-Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25XE041B-MHN-Y is usually 5 days.

3.What payment methods are accepted for AT25XE041B-MHN-Y?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE041B-MHN-Y transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT25XE041B-MHN-Y?

AT25XE041B-MHN-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT25XE041B-MHN-Y order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AT25XE041B-MHN-Y?

For technical support, including AT25XE041B-MHN-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE041B-MHN-Y requirements.

6.How does Aetrix verify that AT25XE041B-MHN-Y is sourced from the original manufacturer or authorized distributors?

All AT25XE041B-MHN-Y products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25XE041B-MHN-Y meets industry standards.

7.What is the process for return or replacement of AT25XE041B-MHN-Y?

All AT25XE041B-MHN-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE041B-MHN-Y, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AT25XE041B-MHN-Y part is unused and in its original packaging.

Return procedure for AT25XE041B-MHN-Y:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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