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Microchip Technology AT45DB011D-MH-Y
- Part No.:
- AT45DB011D-MH-Y
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT45DB011D-MH-Y.pdf
- Description:
- IC FLASH 1MBIT SPI 66MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,868
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Product details
Overview
AT45DB011D-MH-Y from Adesto Technologies (acquired by Dialog Semiconductor, now part of Renesas) is a 1 Mbit serial DataFlash® memory IC with RapidS SPI interface, organized as 512 pages × 256/264 bytes, supporting up to 66 MHz clock frequency, 2.7–3.6 V single supply, and industrial temperature range. It integrates one 256/264-byte SRAM buffer and enables code shadowing in embedded boot systems.
For engineers reviewing the AT45DB011D-MH-Y datasheet, AT45DB011D-MH-Y pinout, AT45DB011D-MH-Y application, or AT45DB011D-MH-Y equivalent, key selection criteria include page-erase granularity, continuous array read capability, sector lockdown security, hardware write protection (WP), and Deep Power-down current (15 µA typical).
Technical Context
The AT45DB011D-MH-Y implements a dual-level memory architecture: main Flash array (512 pages) plus a dedicated 256/264-byte SRAM buffer for temporary data staging. Its RapidS interface supports SPI Modes 0 and 3 with full-duplex timing-data latched on SCK rising edge (SI), output shifted on falling edge (SO).
All program and erase operations are self-timed and require no external high-voltage programming. Page programming includes built-in erase (83H) or pre-erased-only (88H) modes, while flexible erase options span page (256 B), block (2 KB), sector (32 KB), and chip (1 Mbit) levels-enabling fine-grained firmware updates and secure data management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1,081,344 bits (512 pages × 256/264 bytes); supports both binary (256 B) and DataFlash-standard (264 B) page sizing. |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (0BH/E8H); enables real-time code execution from flash without CPU stalls. |
| Supply Voltage | 2.7 V to 3.6 V single supply; eliminates need for level shifters in 3.3 V microcontroller systems. |
| Power Consumption | 7 mA active read current; 25 µA standby; 15 µA Deep Power-down-supports battery-backed IoT nodes and portable devices. |
| Erase Endurance | 100,000 program/erase cycles per page; ensures long-term reliability in field-upgradable firmware storage. |
| Data Retention | 20 years at 85°C; validated for industrial control and automotive infotainment boot memory applications. |
| Security Features | 128-byte Security Register (64 B user-programmable + 64 B unique device ID); sector lockdown prevents unauthorized firmware modification. |
Pinout & Package
AT45DB011D-MH-Y is housed in an 8-pin SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch) with standard lead finish. Pin functions are fully compatible with SPI-based host controllers and require no external pull-ups except optional WP tie-high.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; falling edge initiates command sequence; must remain low during opcode/address/data transfer. |
| SCK | Serial Clock | Host-generated clock; rising edge latches SI input; falling edge clocks SO output-enables deterministic timing for real-time systems. |
| SI | Serial Input | Command, address, and data input path; MSB-first protocol ensures compatibility with ARM Cortex-M and RISC-V SPI peripherals. |
| SO | Serial Output | Read data output; tri-stated when CS is high-allows bus sharing with other SPI slaves without external logic. |
| WP | Write Protect | Hardware lockout; low state blocks all sector program/erase regardless of software protection status-critical for secure bootloader integrity. |
| RESET | Reset Input | Active-low asynchronous reset; terminates ongoing operations and returns state machine to idle-used for recovery after power brownout. |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage regulator ensures stable core operation across full voltage range. |
| GND | Ground Reference | System ground return; decoupling capacitor (0.1 µF) required within 5 mm of VCC/GND pins for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Array Read | Enables seamless code shadowing: no address retransmission across page boundaries or array wraparound-reduces CPU overhead in bootloaders. |
| User-configurable Page Size | Factory-set 256-byte (binary) or 264-byte (DataFlash) mode-optimizes alignment with MCU cache lines or legacy EEPROM emulation routines. |
| SRAM Data Buffer | 256/264-byte dual-purpose buffer supports simultaneous read-modify-write for byte-alterable EEPROM emulation without external RAM. |
| Sector Lockdown | Hardware-enforced write lock per sector-prevents accidental or malicious overwrite of critical boot code or calibration data. |
| JEDEC ID Support | Standard Manufacturer ID (1Fh) and Device ID (22h) allow automatic detection and configuration in multi-vendor BOMs. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Memory |
|---|---|
Use Scenario: Storing and updating firmware images in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing fast, reliable access to startup code and configuration tables via SPI interface. Use Value: 20-year data retention and 100K endurance ensure firmware integrity over 15+ year product lifecycles without field replacement. | Use Scenario: Secure boot storage in portable diagnostic equipment requiring FDA-compliant traceability and tamper resistance. IC Role / Device Role / Timing Role: Trusted code repository with sector lockdown and unique device ID for cryptographic binding to firmware signatures. Use Value: Hardware WP pin and 128-byte Security Register meet IEC 62304 requirements for protected medical software execution. |
| Automotive Infotainment UI Assets | Smart Meter Firmware Update Cache |
Use Scenario: Caching graphical assets (icons, fonts, animations) in head-unit displays where rapid sequential read performance reduces UI latency. IC Role / Device Role / Timing Role: High-speed serial flash delivering burst reads up to 66 MHz for smooth rendering of compressed UI resources. Use Value: Continuous Array Read (0BH) eliminates inter-page delays-enabling sub-100 µs frame load times for responsive HMI. | Use Scenario: Temporary storage of signed OTA firmware patches in utility meters before validation and atomic update to main application flash. IC Role / Device Role / Timing Role: Secure intermediate buffer with sector-lockdown protecting patch integrity during power-loss-prone update windows. Use Value: Deep Power-down (15 µA) extends battery life during multi-year meter deployments between updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q80DVSSIG | 8 Mbit capacity, Quad SPI support, no SRAM buffer, no sector lockdown, 3.3 V only | Larger code storage but lacks EEPROM emulation and hardware security features | Select when higher density and QSPI bandwidth outweigh need for byte-alterable emulation and secure lockdown. |
| MX25L1006EM1I-12G | 1 Mbit, standard SPI, no buffer, no security register, 2.7–3.6 V, 100K endurance | Lower cost but missing continuous read optimization, WP pin, and device ID | Choose for cost-sensitive consumer applications where security and code shadowing are not required. |
Compared with W25Q80DVSSIG and MX25L1006EM1I-12G, the AT45DB011D-MH-Y uniquely combines SRAM buffer-based EEPROM emulation, hardware sector lockdown, and continuous array read-making it optimal for secure, real-time embedded boot and update workflows rather than bulk storage or generic code storage.
Availability
AT45DB011D-MH-Y is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot memory, and automotive infotainment UI assets requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB011D-MH-Y 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 developed ultra-low-power, feature-rich serial flash memories before its acquisition by Dialog Semiconductor in 2020; Dialog was subsequently acquired by Renesas Electronics in 2021.
The AT45DB011D-MH-Y belongs to the DataFlash® family-designed specifically for embedded systems needing efficient code shadowing, secure firmware updates, and EEPROM-like byte-alterability without external RAM.
FAQ
What is the maximum clock frequency supported by AT45DB011D-MH-Y for continuous array read operations?
The AT45DB011D-MH-Y supports up to 66 MHz for Continuous Array Read using opcodes 0BH (High Frequency Mode) and E8H (Legacy Command). This is specified under fCAR1 in the datasheet and enables real-time streaming of boot code or UI assets without CPU intervention. The 66 MHz limit applies regardless of page size configuration (256 or 264 bytes) and requires proper PCB layout with controlled impedance and minimal trace length.
Does AT45DB011D-MH-Y support true byte-level writes like EEPROM?
The AT45DB011D-MH-Y does not support direct byte-level writes, but enables EEPROM emulation through its integrated 256/264-byte SRAM buffer and three-step read-modify-write operation. This allows byte or bit alteration in software without external RAM-by loading a page into the buffer, modifying target bytes, then programming back to Flash. The process is self-contained and requires no host-side buffering logic.
How does hardware write protection (WP pin) interact with software sector protection on AT45DB011D-MH-Y?
On the AT45DB011D-MH-Y, the WP pin provides unconditional hardware lockout: when asserted (low), it overrides all software-based protection-including Sector Protection Register settings and Sector Lockdown commands-and blocks all program/erase operations to protected sectors. However, Enable Sector Protection and Sector Lockdown commands themselves remain executable even with WP active, allowing dynamic configuration prior to final lockdown.
Can AT45DB011D-MH-Y be used in place of parallel NOR flash in existing designs?
The AT45DB011D-MH-Y is not a drop-in replacement for parallel NOR flash due to its serial RapidS interface, sequential access model, and lack of address/data bus pins. Migration requires firmware changes to use SPI drivers instead of memory-mapped reads, and hardware redesign to replace 44+ pin packages with 8-pin SOIC. However, its continuous array read and low pin count reduce layout complexity and EMI in new designs targeting similar density and voltage ranges.
What is the purpose of the 128-byte Security Register in AT45DB011D-MH-Y?
The 128-byte Security Register in AT45DB011D-MH-Y comprises two 64-byte fields: one user-programmable for keys, certificates, or calibration data; the other a factory-programmed unique device identifier. It supports cryptographic binding of firmware to hardware, enables secure boot verification, and provides tamper-resistant storage independent of main memory-accessible only via dedicated security commands and protected by sector lockdown.
AT45DB011D-MH-Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 1Mbit
- Memory Organization:
- 264 Bytes x 512 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-UDFN (5x6)
AT45DB011D-MH-Y FAQ
1.How can I place an order for AT45DB011D-MH-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB011D-MH-Y 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 AT45DB011D-MH-Y reliable?
The price and inventory of AT45DB011D-MH-Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB011D-MH-Y is usually 5 days.
3.What payment methods are accepted for AT45DB011D-MH-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB011D-MH-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB011D-MH-Y?
AT45DB011D-MH-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB011D-MH-Y 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 AT45DB011D-MH-Y?
For technical support, including AT45DB011D-MH-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB011D-MH-Y requirements.
6.How does Aetrix verify that AT45DB011D-MH-Y is sourced from the original manufacturer or authorized distributors?
All AT45DB011D-MH-Y 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 AT45DB011D-MH-Y meets industry standards.
7.What is the process for return or replacement of AT45DB011D-MH-Y?
All AT45DB011D-MH-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB011D-MH-Y, 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 AT45DB011D-MH-Y part is unused and in its original packaging.
Return procedure for AT45DB011D-MH-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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