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Renesas AT45DB161D-MU-2.5
- Part No.:
- AT45DB161D-MU-2.5
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB161D-MU-2.5.pdf
- Description:
- IC FLASH 16MBIT SPI 50MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,082
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Product details
Overview
AT45DB161D-MU-2.5 from Adesto Technologies is a 16-Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface (up to 66 MHz), dual 512/528-byte SRAM buffers, and flexible page/block/sector/chip erase architecture. It operates from a single 2.5V supply, supports continuous array read for code shadowing, and delivers 7 mA active read current with 25 µA standby - ideal for embedded firmware storage in space-constrained industrial controllers.
For engineers reviewing the AT45DB161D-MU-2.5 datasheet, AT45DB161D-MU-2.5 pinout, AT45DB161D-MU-2.5 application, or AT45DB161D-MU-2.5 equivalent, key selection criteria include its 2.5V-only operation, factory-configurable 512-byte page mode, hardware write protection (WP), RDY/BUSY open-drain signaling, and JEDEC-compliant manufacturer/device ID support.
Technical Context
The AT45DB161D-MU-2.5 implements a sequential-access Flash architecture with two independent 512-/528-byte SRAM buffers enabling concurrent data reception and Flash reprogramming. Its RapidS interface supports SPI Modes 0 and 3 at up to 66 MHz, using MSB-first 8-bit opcodes followed by 21–22-bit address sequences depending on configured page size.
Memory organization comprises 4,096 pages (512 or 528 bytes each), grouped into 16 sectors with hierarchical erasability: page (512 B), block (4 KB), sector (128 KB), or full chip (16 Mbit). All program/erase cycles are fully self-timed, with status indicated via RDY/BUSY pin and internal status register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 bytes) organized as 4,096 × 512-byte or 528-byte pages |
| Supply Voltage | 2.5 V only (2.5V ±10%); no 2.7V–3.6V dual-supply mode supported in -MU-2.5 variant |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (0BH/E8H) and Buffer Read commands |
| Page Size | Factory-configured to 512 bytes per page; not user-reconfigurable in this variant |
| Active Current | 7 mA typical during read operations - enables low-power firmware boot loading |
| Data Retention | 20 years at 85°C - validated for long-life industrial deployment without refresh |
| Endurance | 100,000 program/erase cycles per page - sufficient for frequent firmware update scenarios |
Pinout & Package
AT45DB161D-MU-2.5 uses an 8-pin SOIC package (3.9 mm × 4.9 mm) with standard SPI-compatible pin assignment and dedicated control signals for hardware write protection and ready/busy monitoring.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; falling edge initiates command sequence; high-impedance SO when deasserted |
| SCK | Serial Clock | Input clock; rising edge latches SI data, falling edge clocks SO data - defines timing for all transfers |
| SI | Serial Input | Command/opcode/address/data input path; MSB-first, synchronous to SCK rising edge |
| SO | Serial Output | Data/command response output; tri-stated when CS high; synchronized to SCK falling edge |
| WP | Write Protect | Hardware lockout: low state blocks all program/erase to protected sectors regardless of software settings |
| RDY/BUSY | Ready/Busy Indicator | Open-drain output pulled high externally; driven low during self-timed program/erase/page-to-buffer transfers |
| VCC | Power Supply | 2.5 V ±10% input; powers logic and Flash array; no internal voltage regulation required |
| GND | Ground Reference | System ground return; must be low-impedance connection to minimize noise coupling into SPI lines |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 512-byte buffers allow simultaneous host data streaming while Flash is being reprogrammed - eliminates write latency bottlenecks |
| Continuous Array Read | Single opcode + address initiates uninterrupted read across page boundaries at up to 66 MHz - enables direct XIP (execute-in-place) code shadowing |
| Flexible Erase Granularity | Four-level erase hierarchy (page/block/sector/chip) permits precise wear leveling and partial firmware updates without full chip erase |
| Hardware Sector Protection | WP pin enforces physical lockdown of protected sectors - immune to software corruption or accidental command execution |
| Security Register | 128-byte dedicated register with 64-byte user-programmable space and unique 64-byte device ID - supports secure boot key storage and device authentication |
Applications
| Firmware Storage | Industrial Data Logging |
|---|---|
Use Scenario: Storing boot firmware and field-upgradable application code in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Nonvolatile code storage with rapid sequential read capability for fast boot and runtime code fetch. Use Value: 66 MHz Continuous Array Read enables sub-100 ms firmware load times; 20-year retention ensures reliability over equipment lifetime. | Use Scenario: Capturing sensor readings and event logs in remote environmental monitoring stations powered by solar/battery. IC Role / Device Role / Timing Role: Low-power persistent data buffer supporting intermittent write bursts and long-term archival. Use Value: 25 µA standby current extends battery life; page/block erase minimizes write energy per kilobyte logged. |
| Secure Boot Configuration | Medical Device Parameter Storage |
Use Scenario: Storing cryptographic keys and signed firmware manifests in diagnostic imaging systems requiring FDA compliance. IC Role / Device Role / Timing Role: Tamper-resistant configuration storage with hardware write lock and unique device identifier. Use Value: WP pin + sector lockdown prevents unauthorized modification; 128-byte security register accommodates ECC keys and audit trails. | Use Scenario: Saving calibration coefficients, usage counters, and patient history in portable ultrasound probes. IC Role / Device Role / Timing Role: High-reliability parameter archive with guaranteed 100,000-cycle endurance and traceable device identity. Use Value: 20-year data retention meets medical device shelf-life requirements; JEDEC ID enables serialized field failure analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB161E-MU | Successor part with enhanced ESD rating (4 kV HBM), same pinout and command set; supports identical 2.5V operation and 512-byte page mode | Recommended for new designs per Adesto documentation; identical firmware compatibility but improved robustness in noisy industrial environments | Select AT45DB161E-MU for new designs requiring extended lifecycle support and higher ESD immunity. |
| W25Q16JVSSIQ | 16 Mbit Quad SPI Flash (Winbond); requires QSPI interface and different command set; no built-in SRAM buffers or continuous array read mode | Higher throughput possible with quad I/O, but lacks seamless code shadowing and concurrent buffer operation - demands host-side buffering logic | Choose W25Q16JVSSIQ only if system already uses QSPI controller and can implement software-managed buffering. |
Compared with AT45DB161D-MU-2.5, the AT45DB161E-MU offers drop-in replacement with improved ESD tolerance and ongoing production support, while the W25Q16JVSSIQ requires interface redesign and firmware adaptation due to absence of dual-buffer architecture and continuous read optimization.
Availability
AT45DB161D-MU-2.5 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, and battery-powered environmental sensors requiring stable component supply, long-term data retention, and 2.5V-only operation.
Supply support for AT45DB161D-MU-2.5 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 (acquired by Dialog Semiconductor in 2020, now part of Renesas) specialized in ultra-low-power nonvolatile memory and IoT connectivity solutions.
The AT45DB161D belongs to the DataFlash® family, designed specifically for embedded systems needing high-speed sequential access, integrated buffering, and hardware-based data protection - targeting firmware, code shadowing, and secure parameter storage.
FAQ
What is the operating voltage range for the AT45DB161D-MU-2.5?
The AT45DB161D-MU-2.5 is specified exclusively for 2.5 V ±10% operation (2.25 V to 2.75 V). Unlike broader variants, this -MU-2.5 suffix denotes factory-trimmed 2.5V-only functionality - it does not support 2.7V–3.6V operation. This ensures optimal power efficiency and timing stability in low-voltage embedded systems where rail consistency is critical.
Does the AT45DB161D-MU-2.5 support true SPI Mode 0 and Mode 3?
Yes, the AT45DB161D-MU-2.5 fully supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1) as defined in the RapidS™ specification. Data is latched on the rising edge of SCK and output on the falling edge, with CS active-low framing - enabling direct interoperability with standard SPI controllers without protocol translation.
Can the page size of the AT45DB161D-MU-2.5 be changed in-system?
No. The AT45DB161D-MU-2.5 is factory-configured for fixed 512-byte pages. While the broader AT45DB161D family supports user-selectable 512/528-byte modes via status register, the -MU-2.5 variant locks this configuration at manufacture. This guarantees deterministic addressing and eliminates runtime configuration overhead in safety-critical applications.
How does the RDY/BUSY pin behave during a page program operation on the AT45DB161D-MU-2.5?
During any self-timed operation - including page program with or without built-in erase - the RDY/BUSY pin on the AT45DB161D-MU-2.5 is actively driven low. It remains low until the operation completes, then returns high. This open-drain signal requires an external pull-up resistor and provides hardware-synchronized readiness indication without polling the status register.
Is the AT45DB161D-MU-2.5 RoHS compliant and halogen-free?
Yes, the AT45DB161D-MU-2.5 is Green (Pb/Halide-free/RoHS Compliant) per its official qualification. The SOIC package uses matte tin lead finish, and all materials meet JEDEC J-STD-609 Category 1 (halogen-free) and EU RoHS Directive 2011/65/EU requirements - verified in the original Adesto datasheet revision 3500O–DFLASH–11/2012.
AT45DB161D-MU-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 528 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 50 MHz
- Write Cycle Time - Word, Page:
- 6ms
- 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-VDFN (6x5)
AT45DB161D-MU-2.5 FAQ
1.How can I place an order for AT45DB161D-MU-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161D-MU-2.5 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 AT45DB161D-MU-2.5 reliable?
The price and inventory of AT45DB161D-MU-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB161D-MU-2.5 is usually 5 days.
3.What payment methods are accepted for AT45DB161D-MU-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161D-MU-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161D-MU-2.5?
AT45DB161D-MU-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161D-MU-2.5 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 AT45DB161D-MU-2.5?
For technical support, including AT45DB161D-MU-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161D-MU-2.5 requirements.
6.How does Aetrix verify that AT45DB161D-MU-2.5 is sourced from the original manufacturer or authorized distributors?
All AT45DB161D-MU-2.5 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 AT45DB161D-MU-2.5 meets industry standards.
7.What is the process for return or replacement of AT45DB161D-MU-2.5?
All AT45DB161D-MU-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161D-MU-2.5, 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 AT45DB161D-MU-2.5 part is unused and in its original packaging.
Return procedure for AT45DB161D-MU-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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