My Inquiry
My Account
Renesas AT25DF081-SSHN-B
.jpg)
- Part No.:
- AT25DF081-SSHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25DF081-SSHN-B.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25DF081-SSHN-B from Adesto Technologies is an 8-Mbit SPI serial Flash memory IC designed for code shadowing and data storage in embedded systems. It operates from a single 2.7V–3.6V supply, supports SPI Modes 0/3 and RapidS™ up to 100MHz, delivers ≤5ns clock-to-output delay, and features uniform 4/32/64-Kbyte block erase plus full-chip erase.
For engineers reviewing the AT25DF081-SSHN-B datasheet, AT25DF081-SSHN-B pinout, AT25DF081-SSHN-B application, or AT25DF081-SSHN-B equivalent, this page provides verified electrical specs, SOIC-8 and DFN-8 package details, sector protection architecture, dual-input/dual-output programming/read modes, and validated alternative parts for industrial code+data storage designs.
Technical Context
The AT25DF081-SSHN-B implements a flexible erase hierarchy with four granularities (4/32/64-Kbyte blocks + full chip), enabling efficient co-location of firmware code and runtime data without wasted space. Its 16 × 64-Kbyte sectors support individual hardware write-protection via the WP pin and software-controlled global protect/unprotect.
It integrates dual-mode I/O: SI/SO operate as standard SPI inputs/outputs, but switch to SIO/SOI during Dual-Output Read (3Bh) and Dual-Input Program (A2h) commands-enabling 2-bit-per-clock transfer at up to 100MHz. The device includes a 128-byte OTP security register and sector lockdown for permanent read-only enforcement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1 Mbyte) organized as 16 × 64-Kbyte sectors |
| Supply Voltage | 2.7V–3.6V - single-rail operation compatible with 3.3V logic systems |
| Max Clock Frequency | 100MHz (RapidS™ mode) - enables 200 MB/s effective throughput with dual-output read |
| Read Latency | ≤5ns tV - minimal clock-to-output delay critical for real-time code execution |
| Erase Granularity | 4/32/64-Kbyte blocks + full chip - eliminates need for external EEPROM in mixed code/data applications |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - suitable for field-updatable firmware |
| Power Consumption | 5mA active read current (20MHz), 5µA deep power-down - optimized for battery-backed or low-power IoT nodes |
Pinout & Package
AT25DF081-SSHN-B is available in two RoHS-compliant packages: 8-lead SOIC (150-mil width) and 8-pad Ultra Thin DFN (5 × 6 × 0.6 mm). Both share identical pin functions and ordering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; rising edge terminates operations and places SO/SIO in high-Z state |
| SCK | Serial clock input | Controls data latching (rising edge) and output timing (falling edge); supports SPI Modes 0/3 |
| SI (SIO) | Serial input / dual-output data pin | Standard input for commands/addresses; becomes output during Dual-Output Read (3Bh) |
| SO (SOI) | Serial output / dual-input data pin | Standard output for read data; becomes input during Dual-Input Program (A2h) |
| WP | Hardware write-protect input | Low-active pin that locks protected sectors; internally pulled high; floatable if unused |
| HOLD | Communication pause input | Halts SPI transfer without deselecting device; requires CS asserted and SCK low to activate |
| VCC | Power supply | 2.7V–3.6V main supply; no auxiliary voltage required for programming/erasing |
| GND | Ground reference | System ground connection; required for stable operation and ESD immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Input/Dual-Output SPI | Enables 2× bandwidth vs standard SPI: A2h command writes 2 bits/clock; 3Bh reads 2 bits/clock |
| Fine-Granularity Erase | 4-Kbyte block erase allows patching small firmware modules without disturbing adjacent code or data |
| Hardware Sector Protection | WP pin physically disables write/erase to protected sectors - immune to software faults or malware |
| Sector Lockdown | Permanent read-only enforcement for 64-Kbyte sectors - prevents tampering with boot code or keys |
| OTP Security Register | 128-byte one-time programmable area for device serialization, ESN, or cryptographic key storage |
Applications
| Secure Boot Storage | Firmware Over-the-Air (FOTA) |
|---|---|
Use Scenario: Storing immutable bootloader and root-of-trust keys in embedded microcontrollers for secure startup validation. IC Role / Device Role / Timing Role: Non-volatile storage for authenticated boot images and cryptographic keys with hardware-enforced read-only lockdown. Use Value: Prevents unauthorized modification of boot code using sector lockdown and OTP register - meets IEC 62443 and Common Criteria requirements. | Use Scenario: Receiving and validating encrypted firmware updates in connected medical devices or industrial gateways. IC Role / Device Role / Timing Role: Dual-Output Read enables fast verification of update signatures; 4-Kbyte erase granularity permits atomic patching of firmware modules. Use Value: Reduces update time by 40% vs standard SPI Flash and eliminates risk of partial-write corruption during power loss. |
| Data Logging with Code Co-location | Consumer Electronics Code Shadowing |
Use Scenario: Recording sensor telemetry in smart meters while hosting application firmware on same die. IC Role / Device Role / Timing Role: Shared Flash array partitioned into protected code sectors and individually erasable data sectors. Use Value: Eliminates need for separate EEPROM/FRAM - reduces BOM cost and PCB footprint by 30%. | Use Scenario: Loading application code from Flash into RAM for execution in set-top boxes and digital TVs. IC Role / Device Role / Timing Role: High-speed 100MHz RapidS™ interface minimizes shadowing latency; ≤5ns tV ensures deterministic timing. Use Value: Enables sub-100ms boot time and seamless UI responsiveness in consumer AV systems. |
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 | Same density (8 Mbit), 3.3V supply, SPI Modes 0/3, but lacks RapidS™ and dual-I/O modes; max 80MHz clock | No dual-output read or dual-input program - lower bandwidth for FOTA or code shadowing | Select when RapidS™ compatibility or >80MHz throughput is not required; lower cost in high-volume consumer designs |
| Macronix MX25L8006EM1I-12G | 8 Mbit, 2.7–3.6V, supports 104MHz DTR mode; includes Quad SPI but no native dual-I/O; different sector protection scheme | Requires Quad SPI controller; no hardware WP pin - protection relies solely on status register bits | Choose for designs already using Quad SPI infrastructure; avoid if hardware write-protection or sector lockdown is mandatory |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT25DF081-SSHN-B uniquely delivers RapidS™-optimized 100MHz operation, dedicated hardware WP control, and permanent sector lockdown - making it the only option among the three qualified for secure boot and tamper-resistant data logging.
Availability
AT25DF081-SSHN-B is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, and automotive infotainment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT25DF081-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
Adesto Technologies (now part of Dialog Semiconductor, part of Renesas Electronics) specialized in low-power, high-performance non-volatile memory and analog solutions for IoT and industrial edge devices.
The AT25DF081-SSHN-B belongs to Adesto's AT25DF family of SPI Flash memories engineered for simultaneous code execution and data logging in resource-constrained embedded systems.
FAQ
What is the maximum operating frequency of the AT25DF081-SSHN-B in RapidS™ mode?
The AT25DF081-SSHN-B supports up to 100MHz in RapidS™ mode, enabling dual-output read operations with effective throughput exceeding 200 MB/s. This is confirmed in the official datasheet (8715F–SFLSH–02/2022, Table 6-1 and Section 7.2). Standard SPI read (0Bh opcode) is rated to 85MHz, and legacy 03h read to 50MHz. The AT25DF081-SSHN-B must be configured for RapidS™ protocol to achieve the 100MHz rating.
Does the AT25DF081-SSHN-B support hardware write protection via the WP pin?
Yes, the AT25DF081-SSHN-B includes a dedicated WP (Write Protect) pin that, when driven low, hardware-locks all protected sectors against program and erase operations - independent of software status register settings. The WP pin is internally pulled high and may be left floating if unused, though external connection to VCC is recommended per datasheet guidance. This feature is explicitly defined in Table 2-1 and Section 1 of the AT25DF081-SSHN-B datasheet.
How many sectors does the AT25DF081-SSHN-B have, and what is their size?
The AT25DF081-SSHN-B contains 16 uniform sectors, each 64 Kbytes in size, totaling 1 Mbyte (8 Mbit). This sectoring is fixed and used for individual protection, lockdown, and 64-Kbyte block erase operations. The memory architecture also supports finer 4-Kbyte and 32-Kbyte erase blocks within each sector, as shown in Figure 4-1 and described in Section 4 of the AT25DF081-SSHN-B datasheet.
Can the AT25DF081-SSHN-B be used in dual-input programming mode, and what command enables it?
Yes, the AT25DF081-SSHN-B supports dual-input programming using the A2h opcode, which repurposes the SO pin as SOI (Serial Output/Input) to accept 2 bits per clock cycle alongside SI. This mode reduces programming time by ~50% compared to standard byte/page program (02h). The feature is documented in Section 8.2 and Table 6-1 of the AT25DF081-SSHN-B datasheet, and requires prior issuance of the Write Enable (06h) command.
What is the purpose and capacity of the OTP security register in the AT25DF081-SSHN-B?
The AT25DF081-SSHN-B includes a 128-byte One-Time Programmable (OTP) security register used for immutable storage of device-unique identifiers, electronic serial numbers (ESN), cryptographic keys, or license tokens. Once programmed, OTP bytes cannot be erased or rewritten. This register is accessed via 9Bh (program) and 77h (read) commands, and is detailed in Section 6 (Security Commands) and Section 1 of the AT25DF081-SSHN-B datasheet.
AT25DF081-SSHN-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
- Memory Size:
- 8Mbit
- Memory Organization:
- 256 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 66 MHz
- Write Cycle Time - Word, Page:
- 15µs, 5ms
- 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
AT25DF081-SSHN-B FAQ
1.How can I place an order for AT25DF081-SSHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF081-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 AT25DF081-SSHN-B reliable?
The price and inventory of AT25DF081-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 AT25DF081-SSHN-B is usually 5 days.
3.What payment methods are accepted for AT25DF081-SSHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF081-SSHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF081-SSHN-B?
AT25DF081-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF081-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 AT25DF081-SSHN-B?
For technical support, including AT25DF081-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF081-SSHN-B requirements.
6.How does Aetrix verify that AT25DF081-SSHN-B is sourced from the original manufacturer or authorized distributors?
All AT25DF081-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 AT25DF081-SSHN-B meets industry standards.
7.What is the process for return or replacement of AT25DF081-SSHN-B?
All AT25DF081-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF081-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 AT25DF081-SSHN-B part is unused and in its original packaging.
Return procedure for AT25DF081-SSHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25DF081-SSHN-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…
