My Inquiry
My Account
Renesas AT45DB081D-SSU
.jpg)
- Part No.:
- AT45DB081D-SSU
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB081D-SSU.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,263
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT45DB081D-SSU from Adesto Technologies is an 8 Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface (up to 66 MHz), 4,096 pages × 256/264 bytes, dual 256-/264-byte SRAM buffers, and industrial temperature support. It enables code shadowing, EEPROM emulation, and in-system reprogramming in embedded controllers and voice/image storage systems.
For engineers reviewing the AT45DB081D-SSU datasheet, AT45DB081D-SSU pinout, AT45DB081D-SSU application, or AT45DB081D-SSU equivalent, key selection considerations include page-size configurability (256 vs. 264 bytes), continuous array read capability, sector lockdown security, and low-power operation (25 µA standby) in SOIC-8 and MLF-8 packages.
Technical Context
The AT45DB081D-SSU implements a sequential-access Flash architecture with two independent SRAM buffers that enable concurrent data reception and Flash reprogramming - eliminating write latency bottlenecks. Its RapidS interface supports SPI Modes 0 and 3 at up to 66 MHz, with three distinct read commands (E8H, 0BH, 03H) optimized for high-speed, dummy-byte, and low-frequency operation respectively.
Memory organization is hierarchical: 16 sectors (0a–15), each containing blocks of 8 pages; erase granularity spans page (256 B), block (2 KB), sector (64 KB), or chip (8 Mbit). Page programming includes built-in erase (83H/86H) or no-erase (88H/89H) variants, while hardware write protection (WP pin) operates independently of software sector locking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8,650,752 bits (8 Mbit), organized as 4,096 pages × 256 or 264 bytes |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (0BH/E8H), SPI Modes 0 and 3 compatible |
| Supply Voltage | 2.5 V or 2.7 V to 3.6 V single supply - enables direct interfacing with 2.5/3.3 V microcontrollers |
| Power Consumption | 7 mA typical active read current; 25 µA standby; 15 µA deep power-down - suitable for battery-backed systems |
| Erase/Program Endurance | ≥100,000 program/erase cycles per page - supports frequent firmware updates and logging |
| Data Retention | 20 years at +85°C - validated for long-life industrial deployments |
| Operating Temperature | −40°C to +85°C industrial grade - qualified for harsh environmental operation |
| Security Features | 128-byte security register (64-byte user-programmable + 64-byte unique device ID); sector lockdown and hardware WP pin |
Pinout & Package
AT45DB081D-SSU is supplied in an 8-pin SOIC package (SSU suffix), with pins arranged in standard dual-inline configuration. The package is RoHS-compliant, Pb/halide-free, and rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; falling edge initiates command sequence; rising edge terminates operation and places SO in high-Z |
| SCK | Serial Clock | Input clock controlling data timing; SI latched on rising edge, SO driven on falling edge |
| SI | Serial Input | Command, address, and data input path; MSB-first protocol; requires stable setup/hold relative to SCK |
| SO | Serial Output | Data output path for reads; tri-stated when CS is high; synchronized to SCK falling edge |
| WP | Write Protect | Hardware-level sector protection override; low assertion blocks all program/erase regardless of software settings |
| RESET | Reset Input | Active-low asynchronous reset; terminates ongoing operations and returns state machine to idle |
| VCC | Power Supply | 2.5 V or 2.7 V to 3.6 V supply; powers core logic, Flash array, and I/O buffers |
| GND | Ground Reference | System ground return; must be low-impedance connection to minimize noise coupling into sensitive analog circuits |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 256-/264-byte buffers allow simultaneous data streaming into one buffer while programming the other to Flash - enabling zero-latency continuous writes |
| Configurable Page Size | User-selectable 256-byte (power-of-2) or 264-byte (DataFlash standard) page format - simplifies alignment for legacy systems or optimizes density for new designs |
| Continuous Array Read | Single-command sequential read across full 8 Mbit array with automatic page-wrap and no inter-page delay - ideal for boot code shadowing and audio streaming |
| Flexible Erase Granularity | Four-tier erase (page/block/sector/chip) permits precise wear leveling and partial firmware updates without full chip erasure |
| Hardware + Software Protection | Independent WP pin control plus sector lockdown and 128-byte security register - meets basic secure storage requirements for firmware and calibration data |
| Low-Voltage Operation | Functional across 2.5 V to 3.6 V - eliminates need for level shifters when interfacing with modern ultra-low-voltage MCUs |
Applications
| Embedded Boot Code Storage | Voice/Data Logging |
|---|---|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M or RISC-V microcontrollers requiring fast, reliable startup. IC Role / Device Role / Timing Role: Nonvolatile code storage with continuous array read capability enabling direct XIP-like execution via shadowing into RAM. Use Value: Eliminates external parallel NOR Flash; reduces PCB footprint and BOM count while supporting 66 MHz read throughput for rapid boot sequences. |
Use Scenario: Recording sensor telemetry or voice snippets in battery-powered IoT nodes with infrequent but bursty write activity. IC Role / Device Role / Timing Role: High-endurance, low-power data sink using page-erase-and-program cycles with dual-buffer pipelining to avoid write stalls. Use Value: 100,000-cycle endurance and 15 µA deep power-down extend battery life beyond 5 years in maintenance-free deployments. |
| Firmware Over-the-Air (OTA) Updates | Secure Configuration Storage |
Use Scenario: Storing staged firmware images during wireless OTA updates in industrial gateways and smart meters. IC Role / Device Role / Timing Role: Dual-buffer architecture allows background download into one buffer while executing from Flash, then atomic swap via page program. Use Value: Enables fail-safe update rollback and eliminates risk of bricking due to power loss mid-update - no external ECC or redundant Flash required. |
Use Scenario: Storing calibrated sensor offsets, cryptographic keys, and device-specific identifiers in medical or automotive subsystems. IC Role / Device Role / Timing Role: Sector lockdown and 64-byte unique device ID provide tamper-resistant, factory-programmed identity and configuration binding. Use Value: Meets IEC 62304 and ISO 26262 traceability requirements by linking hardware identity to encrypted calibration data in protected sectors. |
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 Quad SPI (QSPI) interface; 104 MHz max clock; no SRAM buffers; 4 KB uniform erase sectors | Lacks continuous array read and dual-buffer pipelining; better suited for QSPI-capable hosts needing higher bandwidth | Select when host MCU supports QSPI and prioritizes raw speed over seamless streaming or EEPROM emulation |
| Macronix MX25L8006EM1I-12G | 8 Mbit standard SPI; 80 MHz max clock; no configurable page size; no security register or device ID | No hardware write protect pin or sector lockdown; minimal security features; simpler command set | Select for cost-sensitive, non-secure applications where page-size flexibility and identity binding are unnecessary |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT45DB081D-SSU uniquely delivers concurrent buffer+Flash operation, factory-configurable page size, and integrated device identity - making it optimal for resource-constrained, security-aware, or streaming-critical embedded systems where deterministic latency and data integrity are paramount.
Availability
AT45DB081D-SSU is available at Aetrix Electronics and suitable for embedded boot code storage, voice/data logging, and secure configuration storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB081D-SSU 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, a Renesas company) specialized in low-power, high-reliability serial Flash and nonvolatile memory solutions for industrial and IoT applications.
The AT45DB081D belongs to Adesto's DataFlash® family, designed specifically for systems needing seamless code shadowing, EEPROM emulation, and robust data retention - bridging the gap between traditional Flash and true byte-alterable memory.
FAQ
What is the maximum clock frequency supported by the AT45DB081D-SSU for continuous array read operations?
The AT45DB081D-SSU supports continuous array read at up to 66 MHz using opcodes E8H or 0BH, as specified by the fCAR1 parameter. This applies to both 256-byte and 264-byte page configurations. The 03H opcode supports lower-frequency reads up to 33 MHz without dummy bytes. All timing complies with SPI Modes 0 and 3, ensuring interoperability with standard microcontroller SPI peripherals.
Does the AT45DB081D-SSU require high-voltage programming or external circuitry for write operations?
No, the AT45DB081D-SSU performs all programming and erase operations using only its standard 2.5 V to 3.6 V supply - no high-voltage pump or external charge circuitry is needed. Internal charge pumps generate necessary voltages, enabling simple single-supply system design. This eliminates the need for dedicated programming hardware and simplifies in-system firmware updates.
How does the dual-buffer architecture of the AT45DB081D-SSU improve system performance?
The AT45DB081D-SSU's two independent 256-/264-byte SRAM buffers enable overlapping operations: while one buffer streams incoming data, the other can simultaneously program a full page to Flash memory. This pipelining eliminates write latency, supports uninterrupted data capture (e.g., sensor logging), and accelerates firmware updates - all without host CPU intervention or complex scheduling.
Can the AT45DB081D-SSU emulate EEPROM functionality for byte-level updates?
Yes, the AT45DB081D-SSU supports EEPROM emulation through a self-contained three-step read-modify-write operation managed entirely within the device. This avoids external wear-leveling firmware and enables reliable byte- or word-alterable storage using standard SPI commands - ideal for storing configuration parameters, counters, or calibration data subject to frequent small updates.
What security mechanisms does the AT45DB081D-SSU provide for protecting stored firmware or configuration data?
The AT45DB081D-SSU provides layered security: hardware write protection via the WP pin (independent of software), software-controlled sector lockdown, and a 128-byte security register containing 64 bytes of user-programmable space plus a factory-programmed 64-byte unique device identifier. These features collectively prevent unauthorized modification and enable device authentication and secure key binding.
AT45DB081D-SSU 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:
- 264 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 66 MHz
- Write Cycle Time - Word, Page:
- 4ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45DB081D-SSU FAQ
1.How can I place an order for AT45DB081D-SSU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-SSU 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 AT45DB081D-SSU reliable?
The price and inventory of AT45DB081D-SSU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB081D-SSU is usually 5 days.
3.What payment methods are accepted for AT45DB081D-SSU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-SSU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-SSU?
AT45DB081D-SSU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-SSU 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 AT45DB081D-SSU?
For technical support, including AT45DB081D-SSU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-SSU requirements.
6.How does Aetrix verify that AT45DB081D-SSU is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-SSU 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 AT45DB081D-SSU meets industry standards.
7.What is the process for return or replacement of AT45DB081D-SSU?
All AT45DB081D-SSU units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-SSU, 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 AT45DB081D-SSU part is unused and in its original packaging.
Return procedure for AT45DB081D-SSU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT45DB081D-SSU 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…
