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Renesas AT25DF041B-MHN-Y
- Part No.:
- AT25DF041B-MHN-Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25DF041B-MHN-Y.pdf
- Description:
- IC FLASH 4MBIT SPI 104MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,810
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Product details
Overview
AT25DF041B-MHN-Y from Renesas Electronics is a 4-Mbit serial SPI Flash memory IC designed for code shadowing and embedded data storage in resource-constrained systems. It operates from 1.65 V to 3.6 V across –40 °C to +85 °C, supports SPI Modes 0/3 and Dual-I/O read, delivers 104 MHz max clock frequency with 6 ns clock-to-output delay, and integrates hardware write protection via WP pin.
For engineers reviewing the AT25DF041B-MHN-Y datasheet, AT25DF041B-MHN-Y pinout, AT25DF041B-MHN-Y application, or AT25DF041B-MHN-Y equivalent, key selection criteria include dual-I/O throughput optimization, flexible erase granularity (256-byte page to 64-kByte block), OTP security register usage, and industrial-temperature compatibility with ultra-low deep power-down current (200 nA typical).
Technical Context
The AT25DF041B-MHN-Y implements a dedicated SPI interface with dual-input/dual-output capability enabled by reconfigurable SI/SO pins during specific commands. Its memory architecture features uniform erase blocks (4/32/64 kByte) plus 256-byte page erase, enabling efficient co-location of firmware code and runtime data without cross-contamination.
Internal control logic handles automatic program/erase status reporting, software reset, and JEDEC-standard ID reads. The device uses a two-byte status register with configurable protection bits and supports both hardware (WP pin) and software sector locking - critical for secure boot and field-upgrade integrity in connected devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 kByte) - sufficient for compact firmware images and configuration data in microcontroller-based edge nodes. |
| Supply Voltage Range | 1.65 V – 3.6 V - enables direct interfacing with 1.8 V and 3.3 V logic domains without level shifters. |
| Max Clock Frequency | 104 MHz - achieves up to 208 Mbps dual-output read bandwidth, reducing boot time and OTA update latency. |
| Erase Granularity | 256-byte page / 4-kByte block / 32-kByte block / 64-kByte block / full chip - allows precise updates of bootloader, app partitions, or calibration tables without erasing unrelated sectors. |
| Endurance | 100,000 program/erase cycles (–40 °C to +85 °C) - supports frequent field firmware updates in industrial gateways and smart sensors. |
| Data Retention | 20 years - ensures long-term reliability for unattended deployments in metering and infrastructure monitoring. |
| Deep Power-Down Current | 200 nA typical - extends battery life in always-on IoT endpoints where flash remains idle >99% of operational time. |
Pinout & Package
AT25DF041B-MHN-Y is packaged in an 8-lead SOIC (150-mil) with standard pinout compatible with JEDEC MS-012. All pins support 3.6 V tolerant inputs and are specified for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high→low to initiate command sequence and low→high to terminate - required before every opcode transfer. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI), falling edge clocks output (SO/I/O0–I/O1); determines maximum 104 MHz interface speed. |
| SI (I/O0) | Serial Input / Dual-I/O Data 0 | Primary command/address/data input; becomes output (I/O0) during Dual-Output Read to deliver LSB-aligned data alongside SO (I/O1). |
| SO (I/O1) | Serial Output / Dual-I/O Data 1 | Standard read data output; remains active (I/O1) during Dual-Output Read to deliver MSB-aligned data in parallel with SI (I/O0). |
| WP | Write Protect | Hardware lock control; low assertion disables all write/erase commands - used for immutable bootloader protection during system runtime. |
| HOLD | Communication Suspend | Pauses ongoing SPI transfers without deselecting device; requires CS asserted and SCK low to activate - preserves state during host interrupt servicing. |
| VCC | Power Supply | Single 1.65–3.6 V supply; powers internal charge pump for erase/program - eliminates need for external high-voltage generators. |
| GND | Ground Reference | Common return path for all I/O and core logic; must be low-impedance connection to minimize noise coupling into timing-critical SPI signals. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Enables 2-bit-per-clock read throughput using SI and SO as concurrent outputs - doubles effective read bandwidth versus standard SPI without increasing clock frequency. |
| 128-Byte OTP Security Register | Contains 64-byte factory-programmed unique identifier and 64-byte user-programmable space - supports device authentication, secure key injection, and ESN binding in production programming. |
| Flexible Erase Architecture | Supports 256-byte page erase for fine-grained data logging and 64-kByte block erase for firmware partition updates - minimizes wasted space and avoids full-chip erases during partial updates. |
| Ultra-Deep Power-Down | Reduces standby current to 200 nA typical - extends shelf life and operational lifetime in battery-powered asset trackers and environmental sensors. |
| Hardware Write Protection | WP pin provides immediate, glitch-immune disable of all write/erase operations - critical for preventing accidental corruption of boot code during brown-out or reset conditions. |
Applications
| Industrial PLC Firmware Storage | Smart Meter Bootloader Protection |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers with periodic field updates via RS-485 or wireless link. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access for shadowing into RAM; Dual-I/O mode accelerates firmware validation pre-execution. Use Value: 104 MHz clock and 6 ns tV enable sub-100 ms boot verification; 4-kByte block erase permits atomic update of safety-critical control modules without disrupting I/O scanning. | Use Scenario: Securing meter boot firmware against tampering in utility-grade electricity meters operating at –25 °C to +70 °C ambient. IC Role / Device Role / Timing Role: Immutable bootloader storage with hardware write protection; OTP register stores cryptographic keys for secure boot chain verification. Use Value: WP pin hard-locks bootloader region during normal operation; 100,000-cycle endurance supports 10+ years of certified firmware revisions under IEC 62056 compliance. |
| Wireless Sensor Node Configuration | Medical Diagnostic Device Calibration Data |
Use Scenario: Storing sensor fusion parameters, network credentials, and OTA update metadata in BLE/Wi-Fi-enabled environmental sensors deployed in remote locations. IC Role / Device Role / Timing Role: Low-power data storage with rapid random-access reads; ultra-deep power-down mode extends 2-AA battery life beyond 5 years. Use Value: 200 nA deep power-down current reduces quiescent drain to negligible levels; 256-byte page erase enables efficient over-the-air patching of individual configuration fields. | Use Scenario: Retaining factory-calibrated ADC offset/gain coefficients and patient-specific thresholds in portable ultrasound or ECG analyzers requiring FDA 21 CFR Part 11 compliance. IC Role / Device Role / Timing Role: Tamper-evident nonvolatile storage with write-locking; OTP register holds digital signatures for calibration certificate integrity checks. Use Value: Hardware WP + software sector protection prevents unauthorized modification; 20-year data retention meets medical device lifecycle requirements without recalibration intervals. |
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, 1.7–1.95 V supply, 133 MHz max clock, Quad-I/O support (not Dual-I/O), no OTP register | Better suited for high-speed Quad-SPI microcontroller interfaces; lacks factory-unique ID and user-programmable OTP space | Select when system MCU supports QSPI and requires higher bandwidth; avoid if OTP-based device serialization or secure key storage is required. |
| Micron MT25QL04A | 4 Mbit density, 2.7–3.6 V supply only, 133 MHz max clock, Quad-I/O, 128-byte OTP (64-byte factory, 64-byte user), supports XIP | Requires higher VCC; supports execute-in-place for direct code execution; broader industrial temp range (–40 °C to +105 °C) | Prefer for 3.3 V-only designs needing XIP capability; verify voltage compatibility - not suitable for 1.8 V systems where AT25DF041B-MHN-Y operates natively. |
Compared with W25Q40EW and MT25QL04A, AT25DF041B-MHN-Y uniquely combines 1.65 V minimum operation, Dual-I/O (not Quad), and integrated OTP for secure device identity - making it optimal for cost-sensitive, low-voltage, security-aware edge nodes where quad pins are unavailable or unused.
Availability
AT25DF041B-MHN-Y is available at Aetrix Electronics and suitable for industrial PLC firmware storage, smart meter bootloader protection, and wireless sensor node configuration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT25DF041B-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, and IoT applications.
The AT25DF041B-MHN-Y belongs to Renesas' serial Flash memory product line, engineered specifically for reliable, low-voltage, dual-I/O code and data storage in space- and power-constrained embedded systems.
FAQ
What is the operating voltage range for the AT25DF041B-MHN-Y?
The AT25DF041B-MHN-Y operates from 1.65 V to 3.6 V across the full industrial temperature range (–40 °C to +85 °C). This wide supply range allows direct integration with both 1.8 V and 3.3 V microcontroller I/O domains without level-shifting circuitry. The device does not require separate programming or erase voltages - all internal high-voltage generation is handled on-chip.
Does the AT25DF041B-MHN-Y support Quad-SPI or only Dual-I/O?
The AT25DF041B-MHN-Y supports SPI Modes 0 and 3 with Dual-I/O Read capability - using both SI and SO pins as concurrent outputs during specific read commands. It does not support Quad-I/O or Quad-SPI modes. Dual-I/O delivers 2-bit-per-clock throughput, doubling read bandwidth versus standard single-I/O SPI at the same clock rate, but requires no additional pins beyond the standard 4-wire SPI interface.
How is hardware write protection implemented on the AT25DF041B-MHN-Y?
Hardware write protection on the AT25DF041B-MHN-Y is controlled by the WP (Write Protect) pin, which is active-low. When WP is driven low, all program and erase commands are disabled regardless of software status register settings. The WP pin is internally pulled high, so it may be left floating if hardware protection is unused - though Renesas recommends connecting it to VCC for noise immunity. This feature safeguards critical firmware regions like bootloaders from accidental overwrite during power transients.
What is the purpose and structure of the OTP security register in the AT25DF041B-MHN-Y?
The AT25DF041B-MHN-Y includes a 128-byte OTP (One-Time Programmable) security register: 64 bytes are factory-programmed with a unique device identifier, and 64 bytes are user-programmable once. This register supports secure device serialization, electronic serial number (ESN) storage, and locked key injection during manufacturing. Programming is irreversible and performed via dedicated SPI commands; the register is isolated from main array erase cycles, ensuring persistent identity even after full-chip erases.
What erase options are available on the AT25DF041B-MHN-Y and how do they impact system design?
The AT25DF041B-MHN-Y offers five erase granularities: 256-byte page, 4-kByte block, 32-kByte block, 64-kByte block, and full chip. This flexibility allows system designers to align firmware partitions and data logs with optimal erase boundaries - minimizing wasted space and avoiding unnecessary erases of unrelated code. For example, a 4-kByte bootloader can reside in its own protected block, while sensor calibration data fits cleanly in a 256-byte page, enabling independent updates without cross-contamination.
AT25DF041B-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:
- 104 MHz
- Write Cycle Time - Word, Page:
- 8µs, 2.5ms
- 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)
AT25DF041B-MHN-Y FAQ
1.How can I place an order for AT25DF041B-MHN-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF041B-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 AT25DF041B-MHN-Y reliable?
The price and inventory of AT25DF041B-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 AT25DF041B-MHN-Y is usually 5 days.
3.What payment methods are accepted for AT25DF041B-MHN-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF041B-MHN-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF041B-MHN-Y?
AT25DF041B-MHN-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF041B-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 AT25DF041B-MHN-Y?
For technical support, including AT25DF041B-MHN-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF041B-MHN-Y requirements.
6.How does Aetrix verify that AT25DF041B-MHN-Y is sourced from the original manufacturer or authorized distributors?
All AT25DF041B-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 AT25DF041B-MHN-Y meets industry standards.
7.What is the process for return or replacement of AT25DF041B-MHN-Y?
All AT25DF041B-MHN-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF041B-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 AT25DF041B-MHN-Y part is unused and in its original packaging.
Return procedure for AT25DF041B-MHN-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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