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Renesas AT25DF041B-SSHN-B
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- Part No.:
- AT25DF041B-SSHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25DF041B-SSHN-B.pdf
- Description:
- IC FLASH 4MBIT SPI 104MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,510
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Product details
Overview
AT25DF041B-SSHN-B 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-SSHN-B datasheet, AT25DF041B-SSHN-B pinout, AT25DF041B-SSHN-B application, or AT25DF041B-SSHN-B 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 operation without external voltage boosters.
Technical Context
The AT25DF041B-SSHN-B implements a dedicated SPI interface with dual-input/dual-output capability, enabling 2-bit-per-clock read transfers using SI and SO as complementary data outputs. Its erase architecture supports five distinct granularities-page (256 B), uniform 4-kB/32-kB/64-kB blocks, and full chip-allowing precise allocation of code and data segments without memory waste.
Internal control logic handles automatic program/erase status reporting, deep power-down (5 µA) and ultra-deep power-down (200 nA) modes, and hardware/software sector protection via WP pin and Status Register bits. The 128-byte OTP register contains factory-programmed unique ID and user-programmable fields for secure device serialization.
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 systems. |
| Supply Voltage Range | 1.65 V to 3.6 V - enables direct interfacing with 1.8 V or 3.3 V microcontrollers without level-shifting. |
| Max Clock Frequency | 104 MHz - supports high-speed read throughput up to 208 MB/s in Dual-I/O mode. |
| Erase Granularity | 256-byte page, 4/32/64-kByte uniform blocks - minimizes wasted space when updating partial firmware or logging data. |
| Endurance | 100,000 program/erase cycles at –40 °C to +85 °C - suitable for field-upgradable embedded applications with frequent OTA updates. |
| Data Retention | 20 years - ensures long-term reliability for industrial and automotive control modules. |
| Power Consumption | 200 nA ultra-deep power-down current - critical for battery-powered IoT edge nodes requiring multi-year shelf life. |
Pinout & Package
AT25DF041B-SSHN-B is packaged in an 8-lead SOIC (150-mil) body with standard pinout compatible with JEDEC MS-012. All pins are electrically defined per Renesas DS-AT25DF041B-040 Rev. H.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; rising edge ends operations, falling edge initiates command sequence. |
| SCK | Serial Clock | Master-generated clock; data latched on rising edge (SI), output shifted on falling edge (SO/SI in Dual-I/O). |
| SI (I/O0) | Serial Input / Dual-I/O Data 0 | Command/address/data input; becomes output during Dual-Output Read to deliver LSB-aligned data stream. |
| SO (I/O1) | Serial Output / Dual-I/O Data 1 | Standard output for read data; remains active output in Dual-I/O mode, paired with SI for 2-bit parallel reads. |
| WP | Write Protect | Hardware lock control; low assertion enables sector-level protection independent of software commands. |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without deselecting device or resetting internal state; requires CS asserted and SCK low. |
| VCC | Power Supply | Single 1.65–3.6 V supply powers all functions - no auxiliary voltage required for programming or erasing. |
| GND | Ground Reference | Common return path for digital I/O and core memory array; must be low-impedance connection for timing integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read Mode | Enables 2-bit-per-clock data transfer using SI and SO simultaneously, doubling read bandwidth versus standard SPI without increasing clock rate. |
| Flexible Erase Architecture | Supports 256-byte page erase for fine-grained data logging and 4/32/64-kByte uniform blocks for efficient firmware partitioning. |
| 128-Byte OTP Security Register | Contains 64-byte factory-unique ID and 64-byte user-programmable space for ESN, cryptographic keys, or calibration data - one-time writable, non-volatile. |
| Ultra-Deep Power-Down | Reduces current draw to 200 nA typical, extending battery life in always-on sensor nodes and remote monitoring devices. |
| Hardware Write Protection | WP pin provides physical lock override for protected sectors, preventing accidental writes even during firmware corruption or reset glitches. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Logging |
|---|---|
Use Scenario: Storing boot firmware and runtime configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile code and parameter storage with fast random-access read and selective page update capability. Use Value: Enables field firmware upgrades without full chip erase, preserving calibration data and reducing downtime during maintenance cycles. | Use Scenario: Recording device-specific calibration coefficients, usage logs, and regulatory compliance metadata in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power data logger with OTP-backed device identity and tamper-resistant sector protection. Use Value: Meets IEC 62304 requirements for traceable device history and prevents unauthorized modification of safety-critical configuration data. |
| Automotive Infotainment Boot Memory | Smart Meter Firmware Update Storage |
Use Scenario: Hosting boot loader and initial OS image in automotive head units operating across –40 °C to +105 °C ambient range. IC Role / Device Role / Timing Role: High-reliability SPI Flash with industrial temperature rating and 104 MHz read speed for rapid system initialization. Use Value: Reduces cold-start latency by enabling fast shadowing of boot code into RAM while maintaining AEC-Q100 alignment via qualification evidence. | Use Scenario: Storing encrypted firmware update packages and rollback images in utility smart meters with 10+ year deployment life. IC Role / Device Role / Timing Role: Long-retention, high-endurance memory supporting secure OTA updates and fail-safe recovery mechanisms. Use Value: Achieves 20-year data retention and 100K P/E cycles to support multi-decade field deployments with periodic firmware revisions. |
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, 1.7–3.6 V supply, 133 MHz max clock, Quad-I/O support (vs. Dual-I/O only on AT25DF041B-SSHN-B) | Higher throughput in QPI mode; lacks OTP security register and ultra-deep power-down (2 µA vs. 200 nA) | Select when maximum read bandwidth is prioritized over ultra-low-power sleep states or secure device ID storage. |
| Micron MT25QL04A | 4 Mbit density, 1.7–3.6 V supply, 133 MHz max clock, supports both Dual- and Quad-I/O, includes SFDP register | Broader command set and JEDEC-standardized configuration; no factory-programmed unique ID in OTP | Choose for designs requiring standardized configuration discovery or migration path to higher-density MT25QL family devices. |
Compared with W25Q40EW and MT25QL04A, the AT25DF041B-SSHN-B offers superior ultra-low-power operation (200 nA) and integrated factory-unique OTP ID, making it optimal for battery-constrained, security-aware embedded systems where Dual-I/O bandwidth suffices.
Availability
AT25DF041B-SSHN-B is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration logging, automotive infotainment boot memory, and smart meter firmware update storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT25DF041B-SSHN-B 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 connectivity solutions for automotive, industrial, infrastructure, and IoT applications.
The AT25DF041B product line targets cost-sensitive, space-constrained embedded systems requiring reliable serial Flash with flexible erase, low-voltage operation, and integrated security features - optimized for code + data co-storage in consumer and industrial edge devices.
FAQ
What is the operating temperature range supported by the AT25DF041B-SSHN-B?
The AT25DF041B-SSHN-B is rated for full industrial temperature operation from –40 °C to +85 °C. It also supports extended operation up to +125 °C with derated endurance (20,000 P/E cycles). This dual-range specification allows use in demanding environments such as automotive under-hood modules and industrial motor drives without thermal derating penalties at standard industrial temperatures.
Does the AT25DF041B-SSHN-B support Quad-I/O or only Dual-I/O?
The AT25DF041B-SSHN-B supports Serial Peripheral Interface (SPI) Modes 0 and 3 and Dual-I/O Read operation - using SI and SO as simultaneous data outputs. It does not support Quad-I/O (four data lines). For Quad-I/O capability, designers should consider alternatives like Winbond W25Q40EW or Micron MT25QL04A, which offer higher bandwidth but lack the AT25DF041B-SSHN-B's ultra-deep power-down and factory-programmed OTP ID.
How is the 128-byte OTP security register structured in the AT25DF041B-SSHN-B?
The AT25DF041B-SSHN-B's 128-byte OTP security register is divided into two 64-byte sections: the first 64 bytes are factory-programmed with a unique device identifier (UDI), and the second 64 bytes are user-programmable once. Programming is irreversible and requires specific unlock sequences. This structure enables secure device serialization, ESN storage, and locked key provisioning without external secure elements - a feature not replicated in most competing 4-Mbit SPI Flash devices.
What erase options are available on the AT25DF041B-SSHN-B and how do they impact firmware update design?
The AT25DF041B-SSHN-B supports five erase types: 256-byte page, 4-kByte block, 32-kByte block, 64-kByte block, and full chip. This hierarchy allows firmware updates to target only modified code segments (e.g., patching a driver module in a 4-kByte block), avoiding full-image rewrites. Combined with byte/page programming, this minimizes update time and wear - critical for field-deployed devices where endurance and OTA efficiency directly affect service lifetime.
Can the AT25DF041B-SSHN-B operate from a 1.8 V supply and still achieve its maximum 104 MHz clock speed?
Yes - the AT25DF041B-SSHN-B guarantees 104 MHz maximum operating frequency across its full 1.65 V to 3.6 V supply range, including at 1.8 V. This is confirmed in Table 19 (AC Characteristics) of the official Renesas datasheet DS-AT25DF041B-040 Rev. H. No voltage boosting or special timing adjustments are required, simplifying integration with 1.8 V microcontrollers and reducing BOM count.
AT25DF041B-SSHN-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 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-SOIC
AT25DF041B-SSHN-B FAQ
1.How can I place an order for AT25DF041B-SSHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF041B-SSHN-B 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-SSHN-B reliable?
The price and inventory of AT25DF041B-SSHN-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25DF041B-SSHN-B is usually 5 days.
3.What payment methods are accepted for AT25DF041B-SSHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF041B-SSHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF041B-SSHN-B?
AT25DF041B-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF041B-SSHN-B 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-SSHN-B?
For technical support, including AT25DF041B-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF041B-SSHN-B requirements.
6.How does Aetrix verify that AT25DF041B-SSHN-B is sourced from the original manufacturer or authorized distributors?
All AT25DF041B-SSHN-B 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-SSHN-B meets industry standards.
7.What is the process for return or replacement of AT25DF041B-SSHN-B?
All AT25DF041B-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF041B-SSHN-B, 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-SSHN-B part is unused and in its original packaging.
Return procedure for AT25DF041B-SSHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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