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Renesas AT45DB161D-TU-2.5
- Part No.:
- AT45DB161D-TU-2.5
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT45DB161D-TU-2.5.pdf
- Description:
- IC FLASH 16MBIT SPI 50MHZ 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,847
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Product details
Overview
AT45DB161D-TU-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–3.6V supply, supports continuous array read for code shadowing, and delivers 7 mA typical active read current and 15 µA deep power-down current. Used in embedded firmware storage, voice/image buffering, and secure boot applications.
For engineers reviewing the AT45DB161D-TU-2.5 datasheet, AT45DB161D-TU-2.5 pinout, AT45DB161D-TU-2.5 application, or AT45DB161D-TU-2.5 equivalent, key selection considerations include page size configurability (512 vs. 528 bytes), hardware write protection (WP pin), RDY/BUSY open-drain signaling, sector lockdown security, and industrial temperature operation (−40°C to +85°C).
Technical Context
The AT45DB161D-TU-2.5 implements a sequential-access Flash architecture with two independent 512-/528-byte SRAM buffers enabling simultaneous data reception and Flash reprogramming. Its RapidS interface supports SPI Modes 0 and 3 at up to 66 MHz, with command-driven operations including continuous array read (E8H/0BH/03H), buffer-to-page program (83H/86H), and multi-granularity erase (page/4-KB block/128-KB sector/16-Mbit chip).
Memory organization comprises 4,096 pages of 512 or 528 bytes each, mapped via 12-bit page address (PA11–PA0 or A20–A9) and 9-/10-bit byte offset (A8–A0 or BA9–BA0). Sector protection is enforced by both software-controlled registers and hardware WP pin assertion, while a 128-byte security register provides 64-byte user-programmable space and unique 64-byte device ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 bytes), organized as 4,096 × 512-byte or 4,096 × 528-byte pages |
| Supply Voltage | 2.5V–3.6V or 2.7V–3.6V single supply - enables direct interfacing with 2.5V/3.3V logic without level shifters |
| Interface Speed | Up to 66 MHz SCK - supports high-throughput firmware updates and real-time audio streaming |
| Active Read Current | 7 mA typical - minimizes system power budget during code execution or data retrieval |
| Deep Power-Down Current | 15 µA typical - extends battery life in always-on sensor nodes and portable devices |
| Erase Endurance | 100,000 program/erase cycles per page - ensures long-term reliability in field-upgradable systems |
| Data Retention | 20 years - guarantees nonvolatile storage integrity across product lifecycle without refresh |
Pinout & Package
AT45DB161D-TU-2.5 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard lead pitch and RoHS-compliant green finish. Pin functions are electrically defined and validated per Adesto's official datasheet revision 3500O–DFLASH–11/2012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; falling edge initiates command sequence, rising edge terminates self-timed operations |
| SCK | Serial Clock | Input clock synchronizing all SI/SO transfers; data latched on rising edge, output shifted on falling edge |
| SI | Serial Input | Command, address, and data input path; MSB-first protocol supports opcode + address + payload sequences |
| SO | Serial Output | Open-drain or push-pull output (configurable); delivers read data, status bits, or dummy bytes per command mode |
| WP | Write Protect | Hardware lockout: low state disables all protected-sector program/erase regardless of software register state |
| RESET | Reset | Active-low hard reset; terminates ongoing operation and returns internal state machine to idle condition |
| RDY/BUSY | Ready/Busy Indicator | Open-drain output pulled high externally; driven low during self-timed programming, erase, or buffer transfers |
| VCC / GND | Power Supply / Ground | Single 2.5V–3.6V supply rail; decoupling capacitor required near VCC pin for stable high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers (512/528 bytes) | Enables concurrent host data streaming into one buffer while Flash array is being reprogrammed from the other - eliminates write latency bottlenecks |
| Configurable Page Size | Factory-set 512-byte "power-of-two" mode simplifies address arithmetic in legacy systems; 528-byte mode supports ECC metadata storage |
| Continuous Array Read (E8H/0BH/03H) | Auto-incrementing internal address counter allows uninterrupted code shadowing from Flash to RAM without repeated addressing overhead |
| Sector Lockdown & Security Register | Immutable sector locking prevents runtime modification of boot code; 128-byte register includes 64-byte unique device ID for anti-cloning |
| Flexible Erase Granularity | Page (512B), block (4 KB), sector (128 KB), or full chip (16 Mbit) erase options optimize wear leveling and firmware update efficiency |
Applications
| Firmware Storage | Secure Boot Loader |
|---|---|
|
Use Scenario: Storing microcontroller firmware images in resource-constrained IoT edge nodes requiring field upgrades. IC Role / Device Role / Timing Role: Nonvolatile code repository accessed via SPI during boot or OTA update; supports rapid page program and sector erase. Use Value: Dual-buffer architecture enables background download into SRAM while executing current firmware - zero-downtime updates. |
Use Scenario: Hosting immutable bootloader code and cryptographic keys in medical or industrial control systems. IC Role / Device Role / Timing Role: Secure storage element with hardware WP pin and sector lockdown preventing unauthorized overwrite of critical boot sectors. Use Value: 128-byte security register provides tamper-resistant device identity and user-configurable key storage - meets IEC 62443 requirements. |
| Voice/Data Logging | Code Shadowing |
|
Use Scenario: Capturing sensor telemetry or voice snippets in battery-powered environmental monitors. IC Role / Device Role / Timing Role: High-endurance sequential write buffer with 100K cycle rating; low 15 µA deep power-down extends operational lifetime. Use Value: Page-erase granularity allows efficient overwriting of oldest log entries without erasing entire memory - optimal flash utilization. |
Use Scenario: Accelerating MCU execution speed by copying frequently accessed code from Flash to RAM at startup. IC Role / Device Role / Timing Role: High-speed continuous array read (66 MHz) delivers sustained throughput for linear instruction fetch. Use Value: No address retransmission across page boundaries - seamless wraparound eliminates timing gaps during shadowing. |
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-TU | Successor with enhanced reliability, same pinout and command set; supports extended voltage range (2.3V–3.6V) | Recommended for new designs requiring longer product lifecycle support and improved data retention margin | Select AT45DB161E-TU when designing new products; AT45DB161D-TU-2.5 remains viable for legacy BOM continuity |
| W25Q16JVSSIQ | Standard SPI NOR Flash (16 Mbit), no SRAM buffers, no continuous array read, higher 3.3V-only supply | Better suited for random-access code execution; lacks DataFlash-specific features like buffer streaming and sector lockdown | Choose W25Q16JVSSIQ only if system requires JEDEC-standard NOR behavior and does not rely on dual-buffer streaming or security register |
Compared with AT45DB161E-TU, the AT45DB161D-TU-2.5 offers identical functionality but lacks extended voltage tolerance and updated process node benefits; versus W25Q16JVSSIQ, it trades standard NOR compatibility for superior sequential throughput, lower power in deep sleep, and integrated security primitives - making it optimal for streaming-aware, security-sensitive embedded firmware storage.
Availability
AT45DB161D-TU-2.5 is available at Aetrix Electronics and suitable for firmware storage, secure boot loader implementation, and voice/data logging applications requiring stable component supply and long-term industrial-grade reliability.
Supply support for AT45DB161D-TU-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 (now part of Dialog Semiconductor, a Renesas company) specialized in low-power, high-reliability nonvolatile memory solutions for industrial and IoT applications.
The AT45DB161D-TU-2.5 belongs to the DataFlash® family, engineered specifically for systems needing fast sequential access, embedded security, and ultra-low-power operation - targeting medical devices, smart meters, and programmable logic controllers.
FAQ
What is the operating voltage range for the AT45DB161D-TU-2.5?
The AT45DB161D-TU-2.5 operates from a single supply of 2.5V to 3.6V or 2.7V to 3.6V. This dual-voltage capability allows direct integration with both 2.5V and 3.3V microcontroller interfaces without external level-shifting circuitry. The AT45DB161D-TU-2.5 maintains full functionality-including 66 MHz RapidS operation and all erase/program commands-across this entire range, with typical active current of 7 mA at 3.3V and 15 µA deep power-down current at 2.5V.
Does the AT45DB161D-TU-2.5 support true SPI Mode 0 and Mode 3?
Yes, the AT45DB161D-TU-2.5 explicitly supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1) as stated in its official datasheet. Data is latched on the rising edge of SCK and output on the falling edge, consistent with standard SPI timing. The AT45DB161D-TU-2.5 achieves up to 66 MHz clock frequency in both modes, enabling interoperability with common MCU SPI peripherals without custom timing adjustments.
How does the dual-buffer architecture of the AT45DB161D-TU-2.5 improve system performance?
The AT45DB161D-TU-2.5 integrates two independent 512-/528-byte SRAM buffers that operate asynchronously from the main Flash array. This allows a host processor to stream new data into one buffer while simultaneously programming the other buffer's contents into Flash - eliminating idle time during page writes. The AT45DB161D-TU-2.5 thus enables continuous data acquisition (e.g., sensor logs or audio samples) without interrupting Flash reprogramming, significantly improving real-time throughput.
Can the AT45DB161D-TU-2.5 be used for secure code storage?
Yes, the AT45DB161D-TU-2.5 provides multiple hardware-enforced security mechanisms: individual sector lock/unlock via software register, permanent sector lockdown (irreversible), and a dedicated 128-byte security register containing 64-byte user-programmable space plus a unique 64-byte device identifier. The AT45DB161D-TU-2.5 also supports hardware write protection via the WP pin, which overrides all software protections - making it suitable for storing cryptographic keys and boot code in regulated environments.
Is the AT45DB161D-TU-2.5 still recommended for new designs?
No - the AT45DB161D-TU-2.5 is marked "Not Recommended for New Designs" in its official datasheet, with the AT45DB161E-TU designated as its direct successor. While the AT45DB161D-TU-2.5 remains fully functional and supported for existing production, new designs should use the AT45DB161E-TU, which offers improved process reliability, extended voltage range (2.3V–3.6V), and continued long-term availability. Aetrix Electronics maintains inventory of AT45DB161D-TU-2.5 for legacy BOM fulfillment.
AT45DB161D-TU-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- 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:
- 28-TSOP
AT45DB161D-TU-2.5 FAQ
1.How can I place an order for AT45DB161D-TU-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161D-TU-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-TU-2.5 reliable?
The price and inventory of AT45DB161D-TU-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-TU-2.5 is usually 5 days.
3.What payment methods are accepted for AT45DB161D-TU-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161D-TU-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161D-TU-2.5?
AT45DB161D-TU-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161D-TU-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-TU-2.5?
For technical support, including AT45DB161D-TU-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161D-TU-2.5 requirements.
6.How does Aetrix verify that AT45DB161D-TU-2.5 is sourced from the original manufacturer or authorized distributors?
All AT45DB161D-TU-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-TU-2.5 meets industry standards.
7.What is the process for return or replacement of AT45DB161D-TU-2.5?
All AT45DB161D-TU-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161D-TU-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-TU-2.5 part is unused and in its original packaging.
Return procedure for AT45DB161D-TU-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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