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Renesas AT25SF041-SSHDHR-T
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- Part No.:
- AT25SF041-SSHDHR-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF041-SSHDHR-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
AT25SF041-SSHDHR-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 104 MHz max 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 storage and firmware update modules.
For engineers reviewing the AT25SF041-SSHDHR-T datasheet, AT25SF041-SSHDHR-T pinout, AT25SF041-SSHDHR-T application, or AT25SF041-SSHDHR-T equivalent, this page provides verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts for industrial-grade serial flash selection - all grounded in the official DS-25SF041–044J–9/2023 specification.
Technical Context
The AT25SF041-SSHDHR-T implements a flexible SPI-based serial flash architecture with dual- and quad-I/O read modes enabled via status register configuration. Its memory array is partitioned into 4-Kbyte sectors, 32-Kbyte blocks, and 64-Kbyte blocks - enabling granular erasure for mixed code/data storage without over-erasing.
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. All operations - including 0.7 ms page program and 70 ms 4-Kbyte erase - are internally self-timed and controlled by standard SPI opcodes (e.g., 02h, 20h, 6Bh).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes) - sufficient for bootloader + firmware image in resource-constrained microcontrollers. |
| Supply Voltage | 2.5V–3.6V - compatible with modern low-voltage I/O domains and eliminates need for level shifters in 3.3V systems. |
| Max Clock Frequency | 104 MHz - enables high-throughput firmware reads; supports Quad-I/O mode for up to 416 Mbps effective data rate. |
| Read Latency | 6 ns tV (clock-to-output) - minimizes wait states during instruction fetch, critical for real-time code execution. |
| Erase Granularity | Uniform 4-Kbyte / 32-Kbyte / 64-Kbyte blocks + full chip - allows precise field updates without corrupting adjacent code or config data. |
| Endurance & Retention | 100,000 program/erase cycles and 20-year data retention - meets industrial lifecycle requirements for unattended devices. |
| Power Consumption | 2 µA deep power-down, 10 µA standby, 4 mA active read - enables battery-backed operation in always-on edge nodes. |
Pinout & Package
AT25SF041-SSHDHR-T uses an 8-lead SOIC (208-mil) package with industry-standard SPI pinout and dual/quad I/O reconfiguration capability. All pins support 3.6V-tolerant inputs and are specified across full industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high→low to initiate command, low→high to terminate - controls device selection and SO/SI tri-state behavior. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output - defines timing for all SPI transfers. |
| SI (I/O0) | Serial Input / Quad I/O Data Line 0 | Input for commands/addresses; becomes bidirectional I/O0 in Dual/Quad modes - enables 2-bit or 4-bit parallel data transfer per clock cycle. |
| SO (I/O1) | Serial Output / Quad I/O Data Line 1 | Primary output for standard reads; becomes I/O1 in Dual/Quad modes - shares clock domain with SI, WP, HOLD for high-speed burst reads. |
| WP (I/O2) | Write Protect / Quad I/O Data Line 2 | Hardware lock control for protected blocks; becomes I/O2 in Quad mode - eliminates software-only protection vulnerabilities in secure boot applications. |
| HOLD (I/O3) | Hold Input / Quad I/O Data Line 3 | Pauses ongoing SPI transfer without deselecting device; becomes I/O3 in Quad mode - preserves state during interrupt-driven host operations. |
| VCC | Power Supply | 2.5V–3.6V core and I/O supply - powers internal logic, charge pumps, and I/O buffers; requires local decoupling per datasheet layout guidelines. |
| GND | Ground Reference | Common return path for VCC and signal currents - must be low-impedance and separated from noisy digital ground planes in mixed-signal PCBs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual- and Quad-I/O Read Support | Enables 2× or 4× throughput vs standard SPI read - reduces firmware load time by up to 75% in boot-critical paths. |
| Flexible Erase Architecture | Independent 4/32/64-Kbyte erase blocks allow selective firmware patching without disturbing bootloader or calibration data. |
| Three Security Register Pages | Individually lockable nonvolatile pages for ESN, cryptographic keys, or device-specific credentials - hardened against unauthorized read/write. |
| Hardware Write Protection | WP pin asserts physical lock on protected memory regions - prevents accidental or malicious overwrite during system reset or brown-out events. |
| Deep Power-Down Mode | 2 µA typical current draw extends battery life in always-on IoT sensors - exit time is <5 µs, enabling rapid wake-and-read operation. |
Applications
| Consumer Electronics Boot Storage | Industrial Firmware Update Module |
|---|---|
|
Use Scenario: Storing boot code and OS kernel for smart TV SoCs requiring fast cold-start execution. IC Role / Device Role / Timing Role: Serial flash memory providing nonvolatile storage for executable code; accessed via SPI master during power-on reset sequence. Use Value: 6 ns tV and 104 MHz Quad-I/O mode reduce boot latency by >40% vs legacy 50 MHz SPI flash, meeting sub-500ms startup targets. |
Use Scenario: Field-upgradable firmware storage in programmable logic controllers (PLCs) with secure OTA update capability. IC Role / Device Role / Timing Role: Code+data flash with hardware write protection and security registers - stores signed firmware images and verification keys. Use Value: Uniform 4-Kbyte erase blocks enable atomic patch application; security pages store ECDSA public keys for signature validation. |
| Medical Device Configuration Storage | Automotive Infotainment Cache |
|
Use Scenario: Retaining calibrated sensor offsets and user preferences in portable ultrasound equipment with battery backup. IC Role / Device Role / Timing Role: Low-power serial flash operating in deep power-down between sessions; retains data for 20 years at 85°C. Use Value: 2 µA deep power-down current extends coin-cell life beyond 5 years; 100K endurance supports daily recalibration cycles. |
Use Scenario: Caching map tiles and voice recognition models in automotive head units where thermal cycling exceeds 1000 cycles. IC Role / Device Role / Timing Role: High-reliability flash memory qualified for automotive temp range; used as L2 cache between eMMC and application processor. Use Value: Full industrial temperature rating (–40°C to +85°C) and 20-year retention ensure consistent performance across vehicle lifetime. |
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-SSHDHR-T | Successor part with enhanced reliability, same pinout and command set; supports extended temperature range (–40°C to +105°C). | Required for new designs targeting automotive under-hood or industrial high-temp environments. | Select AT25SF041B-SSHDHR-T for production releases; AT25SF041-SSHDHR-T remains viable for legacy repair or existing board reuse. |
| Winbond W25Q40EWUXIE | 4-Mbit SPI flash with Quad-I/O, 133 MHz max clock, but no dedicated security register pages or hardware WP pin. | Suitable for cost-sensitive consumer applications where cryptographic key storage is handled externally. | Choose W25Q40EWUXIE when security register functionality is unnecessary and higher clock speed justifies minor footprint change (8-WSON vs 8-SOIC). |
Compared with AT25SF041-SSHDHR-T, the AT25SF041B-SSHDHR-T offers extended temperature qualification and improved data retention margins, while the W25Q40EWUXIE trades security features for higher bandwidth and lower unit cost - making each suitable for distinct design priorities: legacy compatibility, thermal robustness, or raw throughput/cost.
Availability
AT25SF041-SSHDHR-T is available at Aetrix Electronics and suitable for consumer electronics boot storage, industrial firmware update modules, medical device configuration storage, and automotive infotainment cache applications requiring stable component supply and long-term obsolescence management.
Supply support for AT25SF041-SSHDHR-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 delivers its ultra-low-power memory portfolio, including serial flash, for energy-efficient embedded systems.
The AT25SF041 product line was designed specifically for code shadowing and mixed-code/data storage in battery-powered and thermally constrained applications - emphasizing fast read access, flexible erase granularity, and integrated security primitives.
FAQ
What is the operating voltage range of the AT25SF041-SSHDHR-T?
The AT25SF041-SSHDHR-T operates from a single 2.5V to 3.6V supply. This range ensures compatibility with standard 3.3V I/O interfaces and eliminates the need for external voltage translation in most microcontroller-based designs. Operation outside this range may cause undefined behavior or data corruption, and is not supported per the DS-25SF041–044J–9/2023 specification.
Does the AT25SF041-SSHDHR-T support Quad-I/O read mode?
Yes, the AT25SF041-SSHDHR-T supports Quad-I/O read mode using opcode EBh, provided 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 and enabling up to 416 Mbps effective throughput at 104 MHz - confirmed in Section 6.5 of the official datasheet.
How many erase block sizes does the AT25SF041-SSHDHR-T support?
The AT25SF041-SSHDHR-T supports four erase granularities: uniform 4-Kbyte blocks, uniform 32-Kbyte blocks, uniform 64-Kbyte blocks, and full chip erase. This architecture allows precise firmware updates without over-erasing - for example, updating a 12-Kbyte application module requires erasing only three adjacent 4-Kbyte sectors, preserving bootloader and calibration data elsewhere.
Is the AT25SF041-SSHDHR-T still recommended for new designs?
No - the AT25SF041-SSHDHR-T is marked "Not recommended for new designs" in the official datasheet, with AT25SF041B-SSHDHR-T designated as its direct successor. The B-version adds extended temperature support (–40°C to +105°C), improved data retention, and enhanced reliability testing, while maintaining full pin, package, and command compatibility with the original AT25SF041-SSHDHR-T.
What security features does the AT25SF041-SSHDHR-T include?
The AT25SF041-SSHDHR-T includes three dedicated, individually lockable security register pages for storing electronic serial numbers, cryptographic keys, or system credentials. It also supports hardware write protection via the WP pin to prevent unintended modification of protected memory regions - both features are fully documented in Sections 1.1 and 9 of DS-25SF041–044J–9/2023.
AT25SF041-SSHDHR-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:
- Not 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 ~ 125°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF041-SSHDHR-T FAQ
1.How can I place an order for AT25SF041-SSHDHR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041-SSHDHR-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-SSHDHR-T reliable?
The price and inventory of AT25SF041-SSHDHR-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-SSHDHR-T is usually 5 days.
3.What payment methods are accepted for AT25SF041-SSHDHR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041-SSHDHR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041-SSHDHR-T?
AT25SF041-SSHDHR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041-SSHDHR-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-SSHDHR-T?
For technical support, including AT25SF041-SSHDHR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041-SSHDHR-T requirements.
6.How does Aetrix verify that AT25SF041-SSHDHR-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041-SSHDHR-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-SSHDHR-T meets industry standards.
7.What is the process for return or replacement of AT25SF041-SSHDHR-T?
All AT25SF041-SSHDHR-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041-SSHDHR-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-SSHDHR-T part is unused and in its original packaging.
Return procedure for AT25SF041-SSHDHR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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