My Inquiry
My Account
Renesas AT25SF041-SSHD-B
.jpg)
- Part No.:
- AT25SF041-SSHD-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF041-SSHD-B.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,282
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25SF041-SSHD-B 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 - enabling efficient firmware updates in resource-constrained IoT edge nodes.
For engineers reviewing the AT25SF041-SSHD-B datasheet, AT25SF041-SSHD-B pinout, AT25SF041-SSHD-B application, or AT25SF041-SSHD-B equivalent, this page provides verified technical context, validated pin functions, real-world use cases for code/data co-storage, and confirmed alternative parts with documented functional and packaging differences.
Technical Context
The AT25SF041-SSHD-B implements a flexible SPI-based serial Flash architecture with dual- and quad-I/O read modes enabled via configurable status register bits (e.g., Quad Enable). Its memory array is partitioned into 4-Kbyte sectors and 64-Kbyte blocks, supporting byte/page programming (1–256 bytes), hardware write protection via WP pin, and three dedicated security register pages for ESN or key storage.
It integrates deep power-down mode (2 µA typical), active read current of 4 mA, and 100,000 program/erase cycles with 20-year data retention - meeting industrial temperature range (–40°C to +85°C) and RoHS-compliant packaging requirements across SOIC, TSSOP, and DFN variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes) - sufficient for boot code, firmware images, and configuration data in compact MCU-based designs. |
| Supply Voltage | 2.5V–3.6V - compatible with modern low-voltage microcontrollers and eliminates need for level-shifting in 3.3V systems. |
| Max Clock Frequency | 104 MHz - enables high-throughput reads in quad-I/O mode, reducing instruction overhead in time-critical boot sequences. |
| Read Latency | 6 ns tV (clock-to-output) - minimizes wait states during code execution from XIP (execute-in-place) configurations. |
| Erase Granularity | Uniform 4/32/64-Kbyte blocks + full chip - allows precise firmware patching without erasing entire application space. |
| Security Features | 3 programmable/lockable security register pages - supports device serialization, secure key storage, and system-level ESN management. |
| Endurance & Retention | 100,000 P/E cycles / 20 years data retention - validated for long-life deployments in industrial monitoring and medical devices. |
Pinout & Package
AT25SF041-SSHD-B is packaged in an 8-lead SOIC (150-mil width), with pin 1 marked by a notch or dot. All pins are electrically and functionally identical to the AT25SF041 family baseline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; must transition high→low to initiate any command and low→high to terminate operation. |
| SCK | Serial clock input | Controls data timing; rising edge latches SI input, falling edge clocks SO output - supports SPI Modes 0 and 3. |
| SI (I/O0) | Serial input / Quad/Dual I/O | Primary command/address/data input; becomes bidirectional I/O0 in Dual/Quad Read modes for parallel bit transfer. |
| SO (I/O1) | Serial output / Quad/Dual I/O | Primary data output; becomes bidirectional I/O1 in Dual/Quad Read modes - MSB always appears on SO first. |
| WP (I/O2) | Write protect input / Quad I/O | Hardware lock control for protected memory blocks; becomes I/O2 in Quad Read mode for 4-bit parallel data output. |
| HOLD (I/O3) | Communication pause input / Quad I/O | Halts ongoing SPI transfer without deselecting device; becomes I/O3 in Quad Read mode for full 4-bit I/O capability. |
| VCC | Power supply | 2.5V–3.6V main supply; powers internal logic, charge pump, and I/O buffers - requires local decoupling per layout guidelines. |
| GND | Ground reference | System ground return path; must be low-impedance and tied directly to VCC decoupling capacitor ground pad. |
Key Features
| Feature | Design Value |
|---|---|
| Dual- and Quad-I/O Read support | Enables 2× or 4× read bandwidth vs standard SPI - reduces boot time and improves firmware update throughput in constrained systems. |
| Flexible erase architecture | 4/32/64-Kbyte uniform blocks + full chip erase - avoids wasted space when updating modular firmware or logging data segments. |
| Hardware write protection | WP pin locks protected blocks independently - prevents accidental overwrite of bootloader or calibration data during field updates. |
| Security register pages | Three individually lockable 256-byte pages - supports unique device ID, encrypted keys, or regulatory compliance identifiers with persistent storage. |
| Low-power Deep Power-Down | 2 µA typical current - extends battery life in always-on sensor nodes and enables rapid wake-up (<10 µs) for event-triggered operations. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing firmware images and runtime configuration parameters in DIN-rail mounted programmable logic controllers requiring field-upgradable logic without downtime. IC Role / Device Role / Timing Role: Non-volatile code storage with execute-in-place (XIP) capability and fast sector erase for delta updates. Use Value: Uniform 4-Kbyte erase blocks allow patching individual function modules without reprogramming full firmware - reducing update window and validation effort. |
Use Scenario: Holding calibrated sensor offsets, user preferences, and audit logs in portable diagnostic equipment operating under strict IEC 62304 compliance. IC Role / Device Role / Timing Role: Secure, tamper-resistant data storage with lockable security registers for device serialization and regulatory traceability. Use Value: Three dedicated security register pages store immutable ESN and calibration signatures - satisfying FDA design history file requirements for revision-controlled hardware. |
| Smart Meter Bootloader Storage | Automotive Telematics OTA Cache |
|
Use Scenario: Hosting primary bootloader and fallback recovery image in ANSI C12.22-compliant electricity meters deployed in harsh outdoor environments. IC Role / Device Role / Timing Role: Industrial-temp-rated Flash memory with 20-year data retention and hardware write protection for critical boot code. Use Value: 100,000 program/erase cycles and –40°C to +85°C operation ensure reliable over-the-air (OTA) bootloader updates across 15+ year service life. |
Use Scenario: Caching firmware deltas and cryptographic certificates in LTE-connected vehicle telematics units requiring secure, low-latency access during ignition cycles. IC Role / Device Role / Timing Role: High-speed Quad-I/O Flash memory supporting rapid certificate verification and partial firmware loading before CAN bus initialization. Use Value: 104 MHz quad-read mode achieves >40 MB/s effective throughput - enabling sub-second certificate validation and secure boot chain acceleration. |
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-B | Direct successor with enhanced reliability; same pinout, voltage, and command set; improved endurance spec (200K cycles). | Recommended for new designs per Dialog's obsolescence notice; identical footprint and software compatibility. | Select AT25SF041B-SSHD-B for production ramp - offers extended lifecycle support and higher endurance without redesign. |
| Winbond W25Q40EWUXIE | 4-Mbit SPI Flash in 8-pin USON (2×3 mm); supports DTR mode; 133 MHz max clock; 100K cycles; no security registers. | Lacks programmable security pages and hardware WP pin; requires different PCB layout due to USON package. | Choose W25Q40EWUXIE only if board space is critical and security register functionality is not required. |
Compared with AT25SF041-SSHD-B, the AT25SF041B-SSHD-B offers doubled endurance and guaranteed availability, while the W25Q40EWUXIE trades security and WP functionality for smaller footprint and marginally higher speed - making it suitable only where those features are omitted from system requirements.
Availability
AT25SF041-SSHD-B is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, smart meter bootloader storage, and automotive telematics OTA cache applications requiring stable component supply across extended product lifecycles.
Supply support for AT25SF041-SSHD-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
Dialog Semiconductor (now part of Renesas Electronics) is a fabless semiconductor company specializing in low-power mixed-signal ICs for mobile, IoT, and industrial applications.
The AT25SF041-SSHD-B belongs to Dialog's serial Flash memory product line, engineered for robust code and data storage in cost-sensitive, power-constrained embedded systems with industrial temperature and longevity requirements.
FAQ
What is the operating voltage range of the AT25SF041-SSHD-B?
The AT25SF041-SSHD-B operates from a single supply of 2.5V to 3.6V. This range ensures compatibility with standard 3.3V logic systems while maintaining stable performance down to 2.5V - critical for brown-out resilience in battery-backed or energy-harvesting applications. The AT25SF041-SSHD-B does not support 1.8V operation.
Does the AT25SF041-SSHD-B support Quad-I/O read mode, and what is required to enable it?
Yes, the AT25SF041-SSHD-B supports Quad-I/O read using opcode EBh, but requires the Quad Enable (QE) bit in Status Register Byte 2 to be set first. This is done via Write Status Register command (01h) after issuing Write Enable (06h). The AT25SF041-SSHD-B uses SI, SO, WP, and HOLD as I/O3–I/O0 during Quad-I/O operation.
What erase block sizes are available on the AT25SF041-SSHD-B?
The AT25SF041-SSHD-B supports four erase granularities: uniform 4-Kbyte blocks (256 sectors), uniform 32-Kbyte blocks (16 blocks), uniform 64-Kbyte blocks (8 blocks), and full chip erase. These options allow precise firmware patching and efficient data logging without wasting memory space - a key advantage over legacy Flash with fixed large-block erase.
How many security register pages does the AT25SF041-SSHD-B include, and can they be locked independently?
The AT25SF041-SSHD-B includes three dedicated 256-byte security register pages, each individually lockable via dedicated status bits. Once locked, a page becomes read-only until power cycle - enabling secure storage of device-specific identifiers, cryptographic keys, or calibration data. The AT25SF041-SSHD-B supports both program and erase commands (42h/44h) for these pages.
Is the AT25SF041-SSHD-B still recommended for new designs?
No - Dialog Semiconductor explicitly marks the AT25SF041-SSHD-B as "Not recommended for new designs" and recommends migration to the AT25SF041B-SSHD-B. The latter maintains full pin, command, and software compatibility while offering improved endurance (200,000 vs. 100,000 cycles) and continued lifecycle support. The AT25SF041-SSHD-B remains available for legacy program continuity.
AT25SF041-SSHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-B FAQ
1.How can I place an order for AT25SF041-SSHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041-SSHD-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 AT25SF041-SSHD-B reliable?
The price and inventory of AT25SF041-SSHD-B 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-B is usually 5 days.
3.What payment methods are accepted for AT25SF041-SSHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041-SSHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041-SSHD-B?
AT25SF041-SSHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041-SSHD-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 AT25SF041-SSHD-B?
For technical support, including AT25SF041-SSHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041-SSHD-B requirements.
6.How does Aetrix verify that AT25SF041-SSHD-B is sourced from the original manufacturer or authorized distributors?
All AT25SF041-SSHD-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 AT25SF041-SSHD-B meets industry standards.
7.What is the process for return or replacement of AT25SF041-SSHD-B?
All AT25SF041-SSHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041-SSHD-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 AT25SF041-SSHD-B part is unused and in its original packaging.
Return procedure for AT25SF041-SSHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25SF041-SSHD-B Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
