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Renesas AT25DL081-SSHN-B
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- Part No.:
- AT25DL081-SSHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25DL081-SSHN-B.pdf
- Description:
- IC FLASH 8MBIT SPI 100MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,829
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Product details
Overview
AT25DL081-SSHN-B from Renesas Electronics is an 8-Mbit serial Flash memory IC designed for code shadowing and secure data storage in 1.8 V embedded systems. It operates from 1.65 V to 1.95 V, supports SPI Modes 0/3 and RapidS™ up to 100 MHz, features 4-kB/32-kB/64-kB uniform block erase, and includes hardware write protection via WP pin.
For engineers reviewing the AT25DL081-SSHN-B datasheet, AT25DL081-SSHN-B pinout, AT25DL081-SSHN-B application, or AT25DL081-SSHN-B equivalent, this page delivers verified electrical specs, dual-I/O timing behavior, sector lockdown capability, OTP security register layout, and industrial-temperature SOIC package details - all critical for boot code integrity, firmware update resilience, and secure key storage design.
Technical Context
The AT25DL081-SSHN-B implements a flexible erase architecture with 16 × 64-kB sectors, enabling granular code/data partitioning without memory waste. Its Dual-Input Program and Dual-Output Read modes double effective I/O bandwidth by using SI/SO bidirectionally under RapidS™ protocol.
It integrates two independent protection layers: software-configurable sector protection (with Global Protect/Unprotect) and hardware-enforced sector lockdown - including permanent freeze option - plus a 128-byte OTP security register (64 B factory preprogrammed, 64 B user-programmable) for ESN or cryptographic key storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1 MByte), sufficient for boot firmware + configuration + small runtime data in space-constrained designs |
| Supply Voltage | 1.65 V – 1.95 V - compatible with 1.8 V core logic, eliminates level-shifting in modern low-voltage SoC interfaces |
| Max Clock Frequency | 100 MHz (RapidS™), 85 MHz (standard SPI) - enables sub-100 ns instruction fetch latency in code-execution-from-Flash scenarios |
| Read Latency | tV ≤ 5 ns clock-to-output - minimizes wait states during high-speed sequential reads |
| Erase Granularity | Uniform 4-kB, 32-kB, and 64-kB blocks - allows precise firmware patching without disturbing adjacent code or calibration data |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention - validated for field-updatable industrial controllers and medical devices |
| Power Consumption | 10 mA active read current (20 MHz); 8 µA deep power-down - supports battery-backed operation in always-on edge nodes |
Pinout & Package
AT25DL081-SSHN-B is packaged in an 8-lead, 150-mil narrow SOIC (Small Outline Integrated Circuit) with standard JEDEC footprint and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition low-to-high only after command completion to avoid premature standby entry during erase/program |
| SCK | Serial Clock | Controls data latching (rising edge on SI) and output timing (falling edge on SO); determines max interface speed and jitter tolerance |
| SI (SIO) | Serial Input / Dual-Output Data | Primary command/address/data input; becomes SIO output during Dual-Output Read to double throughput |
| SO (SOI) | Serial Output / Dual-Input Data | Primary data output; becomes SOI input during Dual-Input Program to accept parallel bitstream for faster programming |
| WP | Write Protect | Hardware lock for protected sectors; low-active; internally pulled high - requires external tie to VCC if unused to prevent floating-induced glitches |
| HOLD | Communication Pause | Temporarily suspends SPI transaction without resetting state machine; requires CS asserted and SCK low to activate |
| VCC | Power Supply | 1.65–1.95 V supply; powers all internal logic and charge pumps - no auxiliary voltage needed for programming/erasing |
| GND | Ground Reference | System ground return path; must be low-impedance and co-located with VCC decoupling to minimize noise on sensitive read paths |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O RapidS™ Interface | Enables 200 MB/s effective read bandwidth (100 MHz × 2 bits/cycle), reducing boot time and firmware load latency in resource-constrained hosts |
| Flexible Erase Architecture | Supports 4-kB, 32-kB, 64-kB, and full-chip erase - allows safe over-the-air updates of individual firmware modules without risking corruption of bootloader or calibration tables |
| Sector Lockdown with Freeze | Permits permanent read-only locking of any combination of 64-kB sectors - prevents tampering with immutable security keys, boot ROM, or regulatory compliance firmware |
| 128-byte OTP Security Register | 64 bytes factory-programmed (e.g., unique ID), 64 bytes user-programmable - provides trusted root-of-trust storage for device authentication and secure boot chain validation |
| Program/Erase Suspend & Resume | Allows interrupting long erase cycles (e.g., 550 ms 64-kB block erase) to service real-time interrupts, then resuming - essential for deterministic response in industrial PLCs |
Applications
| Secure Boot Firmware Storage | Firmware Over-the-Air (FOTA) Update Partition |
|---|---|
Use Scenario: Storing immutable bootloader and initial firmware image in embedded gateways requiring secure startup verification. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware write protection and sector lockdown to prevent unauthorized modification during power cycling or debug access. Use Value: Ensures boot integrity via permanently locked 64-kB sector containing signed bootloader and public key - resistant to physical or remote firmware rollback attacks. |
Use Scenario: Hosting field-upgradable application firmware in consumer IoT hubs where partial updates must avoid corrupting running services. IC Role / Device Role / Timing Role: Dual-I/O Flash memory supporting fast, atomic 32-kB block erases and byte/page programming for delta-patch deployment. Use Value: Enables sub-second firmware swap using 4-kB erase granularity and suspend/resume - maintains system responsiveness during background updates. |
| Calibration Data & Configuration Storage | Secure Key and Identity Storage |
Use Scenario: Retaining sensor calibration coefficients and user preferences in medical wearables operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade serial Flash with 20-year data retention and 100K-cycle endurance for infrequent but critical nonvolatile parameter writes. Use Value: Eliminates need for separate EEPROM; 64-kB sectors allow isolated, individually protected storage zones for calibration vs. settings - preventing accidental overwrite. |
Use Scenario: Storing device-specific cryptographic keys and Electronic Serial Numbers (ESN) in automotive telematics control units. IC Role / Device Role / Timing Role: OTP security register + sector lockdown used to store AES keys and certificate fingerprints with hardware-enforced read-only access post-programming. Use Value: Provides tamper-resistant key storage without external secure element - meets ISO/SAE 21434 requirements for key lifecycle management in connected vehicles. |
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 W25Q80DVSSIG | 8-Mbit SPI Flash, 1.65–1.95 V, 104 MHz max, but lacks Dual-I/O and sector lockdown; uses standard 8-pin SOIC | No hardware freeze capability or OTP register - unsuitable for secure boot or key storage requiring permanent read-only enforcement | Select when cost sensitivity outweighs security requirements and RapidS™ bandwidth is unnecessary |
| Macronix MX25L8006EM1I-12G | 8-Mbit SPI Flash, 2.7–3.6 V supply only; incompatible voltage range; supports 80 MHz, no Dual-I/O or OTP register | Requires level-shifting for 1.8 V systems; no sector lockdown or dedicated security register - limited to basic code storage | Choose only for legacy 3.3 V designs where AT25DL081-SSHN-B's 1.8 V operation is not required |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT25DL081-SSHN-B uniquely delivers 1.8 V operation with Dual-I/O bandwidth, hardware-frozen sector lockdown, and factory/user OTP space - making it the only option among the three that satisfies secure boot, FOTA resilience, and cryptographic key storage in compact industrial and automotive edge nodes.
Availability
AT25DL081-SSHN-B is available at Aetrix Electronics and suitable for industrial control panels, automotive telematics units, and medical wearable devices requiring stable component supply, long-term manufacturability, and guaranteed green (RoHS-compliant) packaging.
Supply support for AT25DL081-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 memory solutions for automotive, industrial, infrastructure, and IoT markets.
The AT25DL081-SSHN-B belongs to Renesas' serial Flash memory product line, engineered specifically for secure, low-voltage, high-reliability code and data storage in resource-constrained embedded systems demanding industrial temperature operation and robust protection features.
FAQ
What is the operating voltage range of the AT25DL081-SSHN-B?
The AT25DL081-SSHN-B operates from 1.65 V to 1.95 V, optimized for 1.8 V systems. This single-supply range eliminates the need for auxiliary voltages during program or erase operations, simplifying power design and ensuring compatibility with modern low-voltage SoCs and MCUs. The AT25DL081-SSHN-B maintains full functionality-including RapidS™ mode and sector lockdown-across this entire range.
Does the AT25DL081-SSHN-B support dual-line read and write operations?
Yes, the AT25DL081-SSHN-B supports Dual-Output Read (using SI and SO pins simultaneously) and Dual-Input Program (using SI and SO as inputs) under RapidS™ protocol. These modes double effective data throughput versus standard SPI, enabling faster boot sequences and firmware loads. The AT25DL081-SSHN-B achieves 100 MHz operation in RapidS™ mode, delivering up to 200 MB/s effective bandwidth.
How does sector lockdown work on the AT25DL081-SSHN-B?
The AT25DL081-SSHN-B allows any combination of its 16 × 64-kB sectors to be permanently locked down via software commands, with an optional freeze function that disables further lockdown changes. Once frozen, those sectors become read-only for life - even after power cycles or resets. This feature is implemented independently of standard sector protection and is critical for securing bootloader code or cryptographic keys. The AT25DL081-SSHN-B enforces this at the silicon level.
What is the purpose and structure of the OTP security register in the AT25DL081-SSHN-B?
The AT25DL081-SSHN-B includes a 128-byte One-Time Programmable (OTP) security register: 64 bytes are factory-preprogrammed (e.g., unique device ID), and 64 bytes are user-programmable once. It serves as a trusted location for Electronic Serial Numbers (ESN), cryptographic keys, or secure boot certificates. Programming is irreversible, and read access is unrestricted - making it ideal for root-of-trust initialization. The AT25DL081-SSHN-B guarantees OTP integrity across its full industrial temperature range.
Can the AT25DL081-SSHN-B suspend ongoing erase or program operations?
Yes, the AT25DL081-SSHN-B supports Program/Erase Suspend and Resume functions. When activated, it pauses long operations (e.g., 550 ms 64-kB block erase) to service time-critical host interrupts, then resumes from the exact point of suspension. This ensures deterministic real-time behavior in industrial PLCs or automotive ECUs. The AT25DL081-SSHN-B maintains internal state during suspend and requires no re-initialization upon resume.
AT25DL081-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:
- 8Mbit
- Memory Organization:
- 256 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 100 MHz
- Write Cycle Time - Word, Page:
- 8µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25DL081-SSHN-B FAQ
1.How can I place an order for AT25DL081-SSHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DL081-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 AT25DL081-SSHN-B reliable?
The price and inventory of AT25DL081-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 AT25DL081-SSHN-B is usually 5 days.
3.What payment methods are accepted for AT25DL081-SSHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DL081-SSHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DL081-SSHN-B?
AT25DL081-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DL081-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 AT25DL081-SSHN-B?
For technical support, including AT25DL081-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DL081-SSHN-B requirements.
6.How does Aetrix verify that AT25DL081-SSHN-B is sourced from the original manufacturer or authorized distributors?
All AT25DL081-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 AT25DL081-SSHN-B meets industry standards.
7.What is the process for return or replacement of AT25DL081-SSHN-B?
All AT25DL081-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25DL081-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 AT25DL081-SSHN-B part is unused and in its original packaging.
Return procedure for AT25DL081-SSHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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