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Renesas AT25DF041B-SSHNHR-T
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- Part No.:
- AT25DF041B-SSHNHR-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25DF041B-SSHNHR-T.pdf
- Description:
- IC FLASH 4MBIT SPI 85MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,285
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Product details
Overview
AT25DF041B-SSHNHR-T 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 Dual-I/O read mode at up to 104 MHz, features 256-byte page erase, and includes a 128-byte OTP security register with factory-programmed unique ID.
For engineers reviewing the AT25DF041B-SSHNHR-T datasheet, AT25DF041B-SSHNHR-T pinout, AT25DF041B-SSHNHR-T application, or AT25DF041B-SSHNHR-T equivalent, this device delivers verified dual-I/O throughput, industrial temperature operation, hardware write protection via WP pin, and flexible erase granularity for mixed code/data firmware architectures.
Technical Context
The AT25DF041B-SSHNHR-T implements a standard SPI interface compliant with Modes 0 and 3, using rising-edge input sampling and falling-edge output timing. Its internal architecture integrates a flash memory array with Y-gating, SRAM data buffer, and dedicated control logic for program/erase sequencing and status reporting.
Dual-I/O operation repurposes the SI (I/O0) and SO (I/O1) pins as concurrent outputs during Dual-Output Read commands, doubling data rate per clock cycle. Erase operations are fully hardware-managed across four granularities-256-byte page, 4-kByte/32-kByte/64-kByte uniform blocks-and supported by automatic failure detection and status register polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) - sufficient for boot code, firmware images, and configuration data in compact MCU-based designs. |
| Supply Voltage Range | 1.65 V to 3.6 V - enables direct interfacing with 1.8 V and 3.3 V microcontrollers without level-shifting. |
| Max Clock Frequency | 104 MHz - achieves high read bandwidth in Dual-I/O mode, reducing instruction fetch latency in code-shadowing applications. |
| Erase Granularity | 256-byte page, 4/32/64-kByte uniform blocks - allows precise firmware patching and data logging without disturbing adjacent sectors. |
| OTP Security Register | 128-byte (64-byte factory UID + 64-byte user-programmable) - supports secure device identification and key binding in IoT edge nodes. |
| Power Consumption | 200 nA ultra-deep power-down current - extends battery life in always-on sensor nodes and low-duty-cycle telemetry devices. |
| Endurance & Retention | 100,000 P/E cycles at –40 °C to +85 °C; 20-year data retention - meets long-life requirements for industrial controllers and medical firmware storage. |
Pinout & Package
AT25DF041B-SSHNHR-T is packaged in an 8-lead SOIC (150-mil) body with standard SPI pinout and hardware control signals. The package supports reflow soldering and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high→low to initiate any command and low→high to terminate; device remains busy after CS deassertion during self-timed operations. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI/I/O0), falling edge clocks out output (SO/I/O1); defines timing for all SPI transactions. |
| 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 | Primary data output; remains active output (I/O1) during Dual-Output Read, delivering MSB-aligned data concurrently with SI (I/O0). |
| WP | Write Protect | Hardware lock control; low assertion enables sector-level protection independent of software commands; internally pulled high, safe to float if unused. |
| HOLD | Hold | Pauses ongoing SPI transfer without deselecting device; requires CS asserted and SCK low to activate; preserves internal state during host interrupt handling. |
| VCC | Power Supply | Single 1.65–3.6 V supply; powers core logic, memory array, and I/O buffers; no auxiliary voltage required for programming or erasing. |
| GND | Ground | Reference return path for VCC; must be connected directly to system ground plane to ensure noise immunity and stable erase/write margins. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Enables 2-bit-per-clock read throughput using SI and SO as simultaneous outputs, doubling effective bandwidth over standard SPI without increasing clock frequency. |
| Flexible Erase Architecture | Supports page (256 B), 4-kB, 32-kB, 64-kB, and full-chip erase - minimizes wasted space in mixed-code-and-data layouts and reduces firmware update time. |
| Hardware Write Protection | WP pin provides physical, non-volatile sector locking that persists through power cycles and cannot be overridden by software commands. |
| 128-Byte OTP Security Register | Factory-programmed 64-byte unique ID + 64-byte user-writable space - enables secure device onboarding, anti-cloning, and encrypted key storage in constrained-edge devices. |
| Ultra-Deep Power-Down | 200 nA typical standby current - allows multi-year battery operation in wireless sensors and energy-harvesting endpoints where wake-up latency is acceptable. |
| JEDEC Standard IDs | Manufacturer and device ID readable via standardized SPI command - simplifies automated BOM verification and field firmware validation in production test flows. |
Applications
| Firmware Boot Storage | IoT Edge Node Configuration |
|---|---|
|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M microcontrollers in smart meters and industrial gateways. IC Role / Device Role / Timing Role: Non-volatile code storage with fast sequential read access; supports XIP-capable shadow loading into SRAM at startup. Use Value: 104 MHz Dual-I/O read speed reduces boot time by ~40% vs. standard SPI; 256-byte page erase enables atomic firmware patching without full-image reflash. |
Use Scenario: Holding calibrated sensor offsets, network credentials, and device-specific parameters in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Persistent configuration storage with hardware write protection to prevent accidental overwrite during OTA updates. Use Value: WP pin ensures critical settings survive power loss or firmware corruption; 100,000-cycle endurance supports years of field recalibration events. |
| Medical Device Parameter Logging | Automotive Body Control Module Code |
|
Use Scenario: Recording diagnostic timestamps, calibration history, and usage counters in portable ultrasound and infusion pumps. IC Role / Device Role / Timing Role: Reliable data logger with deterministic erase latency; leverages 4-kB block erase for cyclic buffer management. Use Value: 35 ms typical 4-kB block erase time enables sub-100 ms log rotation; 20-year data retention satisfies FDA regulatory archival requirements. |
Use Scenario: Hosting firmware for LIN-connected lighting and window control modules operating across automotive temperature ranges. IC Role / Device Role / Timing Role: AEC-Q100-qualified code storage (per Renesas qualification) supporting –40 °C to +125 °C operation with robust ESD immunity. Use Value: 20,000 P/E cycles at +125 °C ensures longevity under hood conditions; SOIC package offers proven reliability in vibration-prone harness environments. |
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 only), no OTP register. | Better suited for ultra-low-voltage 1.8 V systems requiring quad-speed reads; lacks factory-unique ID for secure provisioning. | Select W25Q40EW when higher clock rate and quad interface are needed, and OTP security is not required. |
| Micron MT25QL04A | 4 Mbit density, 2.7–3.6 V supply, 133 MHz max clock, supports both Dual- and Quad-I/O, includes 64-byte OTP. | Requires minimum 2.7 V supply - incompatible with 1.8 V hosts; offers broader I/O flexibility but narrower voltage range than AT25DF041B-SSHNHR-T. | Choose MT25QL04A for 3.3 V systems needing dual/quad mode agility and moderate OTP capacity, but verify VCC compatibility. |
Compared with W25Q40EW and MT25QL04A, the AT25DF041B-SSHNHR-T uniquely balances 1.65 V operation, Dual-I/O performance, hardware WP pin control, and 128-byte OTP - making it optimal for cost-sensitive, battery-powered, and security-aware embedded designs where voltage headroom and silicon-provisioned identity are critical.
Availability
AT25DF041B-SSHNHR-T is available at Aetrix Electronics and suitable for firmware boot storage, IoT edge node configuration, medical parameter logging, and automotive body control module code requiring stable component supply and long-term lifecycle assurance.
Supply support for AT25DF041B-SSHNHR-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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and IoT markets.
The AT25DF041B product line delivers SPI Flash memory optimized for code+data co-storage in space- and power-constrained embedded systems, emphasizing erase flexibility, security primitives, and wide-voltage interoperability.
FAQ
What is the operating temperature range for the AT25DF041B-SSHNHR-T?
The AT25DF041B-SSHNHR-T is rated for the full industrial temperature range of –40 °C to +85 °C. It also supports extended operation up to +125 °C with derated endurance (20,000 P/E cycles), as specified in the official Renesas datasheet DS-AT25DF041B-040 Rev. H. This makes AT25DF041B-SSHNHR-T suitable for under-hood automotive and industrial control applications where thermal stability is critical.
Does the AT25DF041B-SSHNHR-T support Quad-I/O mode?
No, the AT25DF041B-SSHNHR-T does not support Quad-I/O mode. It supports SPI Modes 0 and 3, and Dual-I/O Read operation using SI (I/O0) and SO (I/O1) as concurrent outputs. Quad-I/O capability is not implemented in the AT25DF041B-SSHNHR-T silicon design or command set, as confirmed by the Renesas datasheet sections 5.1 and Table 2.
How is hardware write protection enabled on the AT25DF041B-SSHNHR-T?
Hardware write protection on the AT25DF041B-SSHNHR-T is controlled by the WP (Write Protect) pin: asserting WP low enables hardware locking of protected sectors, independent of software commands. The WP pin is internally pulled high, so it may be left floating if unused-but Renesas recommends connecting it to VCC for noise immunity. This behavior is documented in Table 1 and Section 9.7 of the AT25DF041B-SSHNHR-T datasheet.
What is the purpose of the 128-byte OTP security register in the AT25DF041B-SSHNHR-T?
The 128-byte OTP security register in the AT25DF041B-SSHNHR-T contains 64 bytes factory-programmed with a unique device identifier and 64 bytes user-programmable for secure keys or calibration data. Once written, OTP bits cannot be reset, enabling tamper-resistant serialization and cryptographic binding. This feature is explicitly defined in Section 10 and Table 8 of the AT25DF041B-SSHNHR-T datasheet.
Can the AT25DF041B-SSHNHR-T operate from a 1.8 V supply?
Yes, the AT25DF041B-SSHNHR-T operates reliably from 1.65 V to 3.6 V, fully covering 1.8 V nominal supply rails. Its DC characteristics-including active read current (5 mA typical), standby current (25 µA), and program/erase timing-are validated across this range per Tables 15–18 in the datasheet. This ensures seamless integration with 1.8 V microcontrollers without level shifters.
AT25DF041B-SSHNHR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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-SOIC
AT25DF041B-SSHNHR-T FAQ
1.How can I place an order for AT25DF041B-SSHNHR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF041B-SSHNHR-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-SSHNHR-T reliable?
The price and inventory of AT25DF041B-SSHNHR-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-SSHNHR-T is usually 5 days.
3.What payment methods are accepted for AT25DF041B-SSHNHR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF041B-SSHNHR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF041B-SSHNHR-T?
AT25DF041B-SSHNHR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF041B-SSHNHR-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-SSHNHR-T?
For technical support, including AT25DF041B-SSHNHR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF041B-SSHNHR-T requirements.
6.How does Aetrix verify that AT25DF041B-SSHNHR-T is sourced from the original manufacturer or authorized distributors?
All AT25DF041B-SSHNHR-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-SSHNHR-T meets industry standards.
7.What is the process for return or replacement of AT25DF041B-SSHNHR-T?
All AT25DF041B-SSHNHR-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF041B-SSHNHR-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-SSHNHR-T part is unused and in its original packaging.
Return procedure for AT25DF041B-SSHNHR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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