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Renesas AT25SF041-SSHD-T
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- Part No.:
- AT25SF041-SSHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF041-SSHD-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,868
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Product details
Overview
AT25SF041-SSHD-T from Dialog Semiconductor (formerly Adesto) is a 4-Mbit serial Flash memory IC designed for code shadowing and data storage in embedded systems. It operates from a single 2.5V–3.6V supply, supports SPI Modes 0/3, delivers up to 104 MHz clock frequency, achieves 6 ns clock-to-output delay, and features uniform 4/32/64-Kbyte block erase plus full chip erase - deployed in consumer electronics boot firmware and IoT sensor node configuration storage.
For engineers reviewing the AT25SF041-SSHD-T datasheet, AT25SF041-SSHD-T pinout, AT25SF041-SSHD-T application, or AT25SF041-SSHD-T equivalent, this page provides verified technical context, real-world timing and erase architecture trade-offs, package-specific I/O mapping, security register usage guidance, and validated alternative options for industrial-grade serial flash migration.
Technical Context
The AT25SF041-SSHD-T implements a flexible multi-granularity erase architecture with four distinct block sizes (4/32/64 Kbyte + full chip), enabling efficient co-location of code modules and data segments without memory fragmentation. Its dual- and quad-I/O read modes use SI/SO/WP/HOLD as bidirectional I/O pins under command control, requiring QE bit enablement for quad operation.
It integrates three programmable security register pages for ESN storage or key locking, hardware write protection via WP pin, and deep power-down mode drawing only 2 µA typical current. The device complies with JEDEC standard ID read methodology and supports industrial temperature range (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbyte) organized as 64 Kbyte sectors with 4-Kbyte sub-blocks - enables fine-grained firmware updates without erasing entire application image. |
| Supply Voltage | 2.5V–3.6V single rail - compatible with modern low-voltage microcontrollers and eliminates need for level shifters in 3.3V systems. |
| Max Clock Frequency | 104 MHz for program/erase and quad-I/O reads - delivers up to 52 MB/s effective throughput in Quad-I/O mode. |
| Timing: tV (Clock-to-Output) | 6 ns typical - ensures minimal latency for real-time code execution from XIP (execute-in-place) configurations. |
| Erase Performance | 70 ms typical for 4-Kbyte block, 300 ms for 32-Kbyte block - balances speed and endurance for frequent data logging applications. |
| Endurance & Retention | 100,000 program/erase cycles and 20-year data retention - meets long-life requirements for industrial controllers and medical devices. |
| Power Consumption | 2 µA deep power-down, 10 µA standby, 4 mA active read - supports battery-powered edge nodes with multi-year runtime. |
Pinout & Package
AT25SF041-SSHD-T is packaged in an 8-lead SOIC (208-mil width), with all pins defined per JEDEC MS-012. Pin functions support standard SPI communication and expand to dual/quad I/O during specific read commands.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; rising edge terminates operations and places SO/SI in high-Z; required to initiate any command sequence. |
| SCK | Serial clock input | Controls data latching on rising edge (SI) and output timing on falling edge (SO); polarity/phase configurable for SPI Modes 0/3. |
| SI (I/O0) | Serial input / Quad I/O0 | Primary command/address/data input; becomes output during Dual/Quad Read to double/quad data rate - no external pull-up needed. |
| SO (I/O1) | Serial output / Quad I/O1 | Primary data output; remains active during Dual/Quad Read; transitions to high-Z when CS deasserted or HOLD asserted. |
| WP (I/O2) | Write protect input / Quad I/O2 | Hardware lock for protected blocks; internally pulled high; repurposed as I/O2 in Quad Read - must be externally tied to VCC if unused. |
| HOLD (I/O3) | Communication pause input / Quad I/O3 | Halts ongoing transfers without deselecting device; internally pulled high; becomes I/O3 in Quad Read - requires SCK low before assertion. |
| VCC | Power supply | 2.5V–3.6V main supply; decoupling capacitor mandatory near pin to suppress switching noise during fast reads. |
| GND | Ground reference | System ground return path; must be low-impedance connection to minimize read errors and timing jitter. |
Key Features
| Feature | Design Value |
|---|---|
| Dual- and Quad-I/O Read Support | Enables 2× or 4× data throughput vs standard SPI read - reduces boot time by up to 75% in XIP-based MCU systems. |
| Uniform Block Erase Architecture | Four granular erase sizes (4/32/64 Kbyte + full chip) prevent wasted space when updating partial firmware images or logging buffers. |
| Three Security Register Pages | Individually lockable nonvolatile pages for ESN, calibration data, or cryptographic keys - immune to accidental overwrite during field firmware updates. |
| Hardware Write Protection | WP pin directly controls sector locking independent of software status register - prevents corruption during brown-out or reset events. |
| Deep Power-Down Mode | 2 µA typical current draw with instant wake-up - extends battery life in always-on sensor nodes without sacrificing responsiveness. |
Applications
| Consumer Electronics Boot Storage | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing bootloader and application firmware in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Serial Flash memory providing execute-in-place (XIP) code execution with 6 ns tV latency and 104 MHz read bandwidth. Use Value: Enables fast cold-start (<500 ms) and seamless OTA firmware rollback using 4-Kbyte block erase granularity. |
Use Scenario: Holding configuration parameters and safety-critical firmware in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile storage with hardware WP pin and 100K-cycle endurance for mission-critical update cycles. Use Value: Prevents unauthorized modification during EMC transients via hardware lock, while supporting 20-year data retention in factory environments. |
| IoT Edge Sensor Node Data Logging | Medical Device Calibration Storage |
Use Scenario: Cyclic logging of temperature/humidity readings in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power serial Flash with 2 µA deep power-down and 32-Kbyte block erase for buffer rotation. Use Value: Achieves >3-year battery life using 300 ms erase time to clear oldest log segment without disrupting sensor sampling. |
Use Scenario: Storing factory-calibrated ADC offsets and sensor linearization coefficients in portable diagnostic tools. IC Role / Device Role / Timing Role: Secure nonvolatile memory with three lockable security register pages for tamper-proof calibration data. Use Value: Ensures regulatory compliance by preventing field alteration of calibration values - each page independently programmable and lockable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25SF041B-SSHD-T | Direct revision with enhanced reliability; same pinout, voltage, timing, and command set - designated "recommended for new designs" per Dialog documentation. | Identical use cases but with updated process node and extended lifecycle support; replaces AT25SF041-SSHD-T in production builds. | Select AT25SF041B-SSHD-T for new designs to ensure long-term availability and qualification continuity. |
| Winbond W25Q40EWUXIE | 4-Mbit SPI Flash with Quad-I/O, 133 MHz max clock, 8-pin USON (2×3 mm); lacks security registers and hardware WP pin. | Suitable for cost-sensitive consumer applications where security and hardware lock are not required. | Choose W25Q40EWUXIE only when footprint compatibility is acceptable and security register functionality is unnecessary. |
Compared with AT25SF041-SSHD-T, the AT25SF041B-SSHD-T offers identical electrical and functional behavior with improved manufacturing consistency, while the W25Q40EWUXIE trades security features for smaller package size and higher clock speed - making it viable only where tamper resistance and hardware write protection are omitted from system requirements.
Availability
AT25SF041-SSHD-T is available at Aetrix Electronics and suitable for consumer electronics boot storage, industrial PLC firmware storage, IoT edge sensor node data logging, and medical device calibration storage requiring stable component supply across extended product lifecycles.
Supply support for AT25SF041-SSHD-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
Dialog Semiconductor acquired Adesto Technologies in 2021 and now manages its ultra-low-power memory portfolio, including serial Flash and conductive-bridge RAM products.
The AT25SF041-SSHD-T belongs to Dialog's Adesto-branded serial Flash family, engineered specifically for energy-constrained embedded systems needing reliable code+data storage with hardware security and industrial temperature operation.
FAQ
What is the operating voltage range of the AT25SF041-SSHD-T?
The AT25SF041-SSHD-T operates from a single 2.5V to 3.6V supply. This range ensures compatibility with common 3.3V I/O domains and eliminates the need for external voltage translation in most microcontroller interfaces. Operation outside this range may cause unpredictable behavior or data corruption, and is not supported per the DS-25SF041–044J–9/2023 datasheet.
Does the AT25SF041-SSHD-T support Quad-I/O read mode?
Yes, the AT25SF041-SSHD-T supports Quad-I/O read mode using opcode EBh, but only after the Quad Enable (QE) bit in Status Register Byte 2 is set. In this mode, SI, SO, WP, and HOLD function as I/O0–I/O3, delivering four bits per clock cycle. The maximum clock frequency for Quad-I/O read is 104 MHz, enabling up to 52 MB/s effective throughput.
How many security register pages does the AT25SF041-SSHD-T include?
The AT25SF041-SSHD-T includes three dedicated, individually lockable security register pages. Each page supports byte-programming and can store unique device identifiers, electronic serial numbers (ESN), or encrypted keys. Once locked, a page cannot be reprogrammed without a full chip erase - ensuring persistent, tamper-resistant storage for critical system data.
What is the typical deep power-down current for the AT25SF041-SSHD-T?
The AT25SF041-SSHD-T draws 2 µA typical current in deep power-down mode, activated via the B9h command. This ultra-low quiescent current enables multi-year battery operation in always-on edge sensors. Recovery time from deep power-down is less than 3 µs, allowing rapid resumption of read operations without system-level delays.
Is the AT25SF041-SSHD-T pin-compatible with the AT25SF041B-SSHD-T?
Yes, the AT25SF041-SSHD-T is pin-compatible and functionally identical to the AT25SF041B-SSHD-T. The 'B' revision introduces process and reliability enhancements but retains identical pinout, timing, command set, and electrical specifications. Dialog explicitly recommends AT25SF041B-SSHD-T for new designs, confirming full backward compatibility.
AT25SF041-SSHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 5µs, 2.5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF041-SSHD-T FAQ
1.How can I place an order for AT25SF041-SSHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041-SSHD-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 AT25SF041-SSHD-T reliable?
The price and inventory of AT25SF041-SSHD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF041-SSHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF041-SSHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041-SSHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041-SSHD-T?
AT25SF041-SSHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041-SSHD-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 AT25SF041-SSHD-T?
For technical support, including AT25SF041-SSHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041-SSHD-T requirements.
6.How does Aetrix verify that AT25SF041-SSHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041-SSHD-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 AT25SF041-SSHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF041-SSHD-T?
All AT25SF041-SSHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041-SSHD-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 AT25SF041-SSHD-T part is unused and in its original packaging.
Return procedure for AT25SF041-SSHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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