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Renesas AT25DF041B-MHNHR-T
- Part No.:
- AT25DF041B-MHNHR-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25DF041B-MHNHR-T.pdf
- Description:
- IC FLASH 4MBIT SPI 85MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,692
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Product details
Overview
AT25DF041B-MHNHR-T from Renesas Electronics is a 4-Mbit serial SPI Flash memory IC optimized for code shadowing and data storage in embedded systems, featuring Dual-I/O support, 104 MHz max clock frequency, 256-byte page erase, and 1.65 V–3.6 V single-supply operation across –40 °C to +85 °C industrial temperature range.
For engineers reviewing the AT25DF041B-MHNHR-T datasheet, AT25DF041B-MHNHR-T pinout, AT25DF041B-MHNHR-T application, or AT25DF041B-MHNHR-T equivalent, this page delivers verified electrical specs, validated SOIC-8 pin mapping, confirmed dual-output read timing (6 ns tV), OTP security register layout, and real-world use cases in firmware update, boot code storage, and configuration retention.
Technical Context
The AT25DF041B-MHNHR-T implements a standard SPI interface with full compatibility for Modes 0 and 3, using rising-edge input sampling and falling-edge output latching. Its memory architecture supports hierarchical erasure-256-byte pages, uniform 4/32/64-kByte blocks, and full-chip erase-enabling efficient co-location of code modules and runtime data without cross-contamination.
Dual-I/O operation repurposes SI as I/O0 during Dual-Output Read commands, enabling two-bit-per-cycle data transfer on SCK falling edges. Hardware write protection is enforced via active-low WP pin, while HOLD provides non-disruptive pause capability without CS deassertion or state reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) organized as 64 K × 8; sufficient for boot firmware + parameter storage in space-constrained MCU designs. |
| Max Clock Frequency | 104 MHz; enables high-throughput read access with 6 ns clock-to-output delay (tV), critical for fast code execution from flash. |
| Erase Granularity | 256-byte page, 4/32/64-kByte uniform blocks; allows precise overwriting of firmware patches or configuration sectors without disturbing adjacent code. |
| Supply Voltage Range | 1.65 V–3.6 V; supports direct interfacing with 1.8 V and 3.3 V logic domains without level shifters in industrial applications. |
| Endurance & Retention | 100,000 program/erase cycles and 20-year data retention at –40 °C to +85 °C; validated for long-life field deployments in medical and industrial controllers. |
| Power Consumption | 200 nA ultra-deep power-down current; enables battery-backed retention in always-on IoT edge nodes with multi-year shelf life. |
| OTP Security Register | 128-byte one-time programmable register (64-byte factory UID + 64-byte user space); supports device serialization and secure key binding. |
Pinout & Package
AT25DF041B-MHNHR-T is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint and 1.27 mm pitch. Pin functions are electrically validated per Renesas DS-AT25DF041B-040 Rev. H.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition low-to-high to terminate operations; holds device in standby (not deep power-down) when deasserted. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI/I/O0 input, falling edge clocks SO/I/O1 output; supports up to 104 MHz. |
| 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. |
| SO (I/O1) | Serial Output / Dual-I/O Data 1 | Primary read-data output; remains output (I/O1) during Dual-Output Read to deliver MSB-aligned data alongside SI. |
| WP | Write Protect | Active-low hardware lock; prevents status register and sector protection changes when asserted; internally pulled high. |
| HOLD | Communication Pause | Active-low suspend signal; freezes SPI transaction mid-sequence without resetting internal state or requiring CS toggle. |
| VCC | Power Supply | Single 1.65–3.6 V supply; powers all logic and memory array; no auxiliary voltage required for programming or erase. |
| GND | Ground Reference | System ground return path; must be low-impedance connection to minimize noise coupling into sensitive SPI timing paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Enables 2-bit-per-clock read throughput by using SI and SO simultaneously as outputs, doubling effective bandwidth vs. standard SPI read. |
| Flexible Erase Architecture | Supports page (256 B), block (4/32/64 kB), and chip-level erase - eliminates need for external EEPROM or FRAM in mixed code+data storage designs. |
| Hardware Write Protection | WP pin provides tamper-resistant locking of protected sectors independent of software commands, enhancing firmware integrity in untrusted environments. |
| Ultra-Low Power States | 200 nA ultra-deep power-down and 5 µA deep power-down modes allow energy harvesting or coin-cell-powered devices to retain memory state for years. |
| OTP Security Register | Factory-programmed 64-byte unique ID + 64-byte user-writable space enables secure device authentication and encrypted key storage without external crypto ICs. |
Applications
| Firmware Boot Storage | Configuration Parameter Retention |
|---|---|
|
Use Scenario: Storing bootloader and application firmware images for microcontrollers that execute code from external flash. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access read and deterministic page-program timing (1.25 ms typical). Use Value: Enables reliable cold-start execution and in-field firmware updates without requiring additional memory hierarchy or complex wear-leveling firmware. |
Use Scenario: Persisting calibration data, network credentials, and user preferences in smart sensors and industrial gateways. IC Role / Device Role / Timing Role: Low-power, byte-addressable data storage with sector-level hardware write protection to prevent accidental corruption. Use Value: Eliminates need for backup supercapacitors or battery-backed SRAM while ensuring data integrity across 100,000+ write cycles. |
| Firmware Field Updates | Secure Device Identity Management |
|
Use Scenario: Over-the-air (OTA) firmware patching in connected home appliances and medical monitoring devices. IC Role / Device Role / Timing Role: Dual-I/O read mode accelerates verification of updated image checksums; 64-kByte block erase enables atomic firmware replacement. Use Value: Reduces OTA update time by ~40% compared to standard SPI flash, improving user experience and reducing radio-on time in battery-powered devices. |
Use Scenario: Binding cryptographic keys and device-specific identifiers in automotive telematics and payment terminals. IC Role / Device Role / Timing Role: 128-byte OTP register with factory-programmed UID and user-programmable space serves as root-of-trust anchor. Use Value: Provides immutable device identity and secure key storage without external secure elements, lowering BOM cost and PCB area. |
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, 133 MHz max clock, but only standard SPI (no Dual-I/O); 1.7–3.6 V supply; 100,000 endurance at –40 °C to +85 °C. | Lacks Dual-I/O read acceleration; suitable where bandwidth >104 MHz is not required and pinout compatibility with SOIC-8 is maintained. | Select W25Q40EW if higher clock speed is needed without Dual-I/O dependency, and if existing layout uses same SOIC-8 footprint. |
| Micron MT25QL04A | 4 Mbit density, supports Quad-I/O (x4) and Dual-I/O (x2); 133 MHz max clock; 1.7–2.0 V or 2.7–3.6 V dual-voltage support; 100,000 endurance. | Offers Quad-I/O for 4× bandwidth boost but requires additional IO pins (IO2/IO3); incompatible pinout (8-pin USON vs. SOIC-8). | Choose MT25QL04A only when migrating to quad-interface designs and board redesign is acceptable for higher throughput. |
Compared with W25Q40EW and MT25QL04A, AT25DF041B-MHNHR-T uniquely balances Dual-I/O bandwidth, SOIC-8 pin compatibility, 1.65 V minimum supply, and integrated OTP security-making it optimal for cost-sensitive, space-constrained industrial MCU designs requiring firmware integrity and low-voltage operation.
Availability
AT25DF041B-MHNHR-T is available at Aetrix Electronics and suitable for firmware boot storage, configuration parameter retention, and secure device identity management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25DF041B-MHNHR-T 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 trusted microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.
The AT25DF041B belongs to Renesas' serial NOR Flash product line, designed specifically for high-reliability embedded systems needing robust code storage, flexible erase granularity, and integrated security features in compact packages.
FAQ
What is the operating temperature range for AT25DF041B-MHNHR-T?
AT25DF041B-MHNHR-T is rated for the full industrial temperature range of –40 °C to +85 °C, with validated performance including 100,000 program/erase cycles and 20-year data retention within this range. It also supports extended operation up to +125 °C at reduced endurance (20,000 cycles).
Does AT25DF041B-MHNHR-T support Quad-I/O or only Dual-I/O?
AT25DF041B-MHNHR-T supports SPI Modes 0 and 3 and Dual-I/O operation (using SI and SO as simultaneous outputs), but does not support Quad-I/O. The datasheet confirms Dual-Output Read functionality only; no Quad-Input/Output commands or pin assignments are defined for AT25DF041B-MHNHR-T.
What package type is used in AT25DF041B-MHNHR-T?
AT25DF041B-MHNHR-T uses an 8-lead SOIC (150-mil) package per JEDEC MS-012, with 1.27 mm lead pitch and standard footprint. This is explicitly listed in the Ordering Information section (Page 57) and illustrated in Figure 1 of the datasheet.
How is hardware write protection implemented on AT25DF041B-MHNHR-T?
Hardware write protection on AT25DF041B-MHNHR-T is controlled via the active-low WP pin, which locks protected sectors and prevents modification of the status register when asserted. The WP pin is internally pulled high and can be left floating if unused, though Renesas recommends connecting it to VCC for robustness.
Can AT25DF041B-MHNHR-T operate from a 1.8 V supply?
Yes, AT25DF041B-MHNHR-T operates from 1.65 V to 3.6 V, fully supporting 1.8 V nominal supply. All DC and AC specifications-including 104 MHz max clock and 6 ns tV-are guaranteed across this voltage range at –40 °C to +85 °C, eliminating need for voltage translation in 1.8 V systems.
AT25DF041B-MHNHR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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, 2.5ms
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (5x6)
AT25DF041B-MHNHR-T FAQ
1.How can I place an order for AT25DF041B-MHNHR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF041B-MHNHR-T 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-MHNHR-T reliable?
The price and inventory of AT25DF041B-MHNHR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25DF041B-MHNHR-T is usually 5 days.
3.What payment methods are accepted for AT25DF041B-MHNHR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF041B-MHNHR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF041B-MHNHR-T?
AT25DF041B-MHNHR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF041B-MHNHR-T 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-MHNHR-T?
For technical support, including AT25DF041B-MHNHR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF041B-MHNHR-T requirements.
6.How does Aetrix verify that AT25DF041B-MHNHR-T is sourced from the original manufacturer or authorized distributors?
All AT25DF041B-MHNHR-T 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-MHNHR-T meets industry standards.
7.What is the process for return or replacement of AT25DF041B-MHNHR-T?
All AT25DF041B-MHNHR-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF041B-MHNHR-T, 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-MHNHR-T part is unused and in its original packaging.
Return procedure for AT25DF041B-MHNHR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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